Trojan.GenericKD.1441563_9a3490eb3f

by malwarelabrobot on March 3rd, 2014 in Malware Descriptions.

Trojan.GenericKD.1441563 (BitDefender), Backdoor:Win32/Rbot (Microsoft), Trojan.Win32.RBot.fw (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Trojan.DownLoader10.60317 (DrWeb), Trojan.GenericKD.1441563 (B) (Emsisoft), RDN/Sdbot.worm!bu (McAfee), WS.Reputation.1 (Symantec), Trojan.Win32.IRCBot (Ikarus), Trojan.GenericKD.1441563 (FSecure), Autoit_c.USH (AVG), AutoIt:Downloader-DM [Trj] (Avast), TROJ_NOTOOLS.BMC (TrendMicro), Trojan.GenericKD.1441563 (AdAware), GenericIRCBot.YR, GenericMSNWorm.YR, Rbot.YR, GenericAutorunWorm.YR, BackdoorIRC.YR, Blazebot.YR, GenericProxy.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor, Worm, WormAutorun, IRCBot, MSNWorm, Trojan-Proxy


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Static Analysis
Relationships
Map
Removal Recommendations

MD5: 9a3490eb3f1e7cc6badde2a680e5975e
SHA1: d20378c61e4a1e6b0e9d77d6d81258b38b45163c
SHA256: 31567fd639d7520f7402cd7f0542098cb8bca953837d343a9a2a4048a042a638
SSDeep: 12288:ehkDgouVA2nxKkorvdRgQriDwOIxmxiZnYQE7PJcE4ants0M0qFceibf4tnSXWTG:uRmJkcoQricOIQxiZY1iants0MpFtDG
Size: 850710 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2012-01-29 23:32:28
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

Behaviour Description
WormAutorun A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Trojan's file once a user opens a drive's folder in Windows Explorer.
IRCBot A bot can communicate with command and control servers via IRC channel.
MSNWorm A worm can spread its copies through the MSN Messanger.
Trojan-Proxy This program can launch a proxy server (SOCKS4) on a designated TCP port.


Process activity

The Trojan creates the following process(es):

rwlzsia.exe:848
msn.exe:612
msn.exe:260
%original file name%.exe:384
%original file name%.exe:912
ctfmon.exe:1224
skype.exe:156

The Trojan injects its code into the following process(es):

rwlzsia.exe:464

File activity

The process rwlzsia.exe:464 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\Cab4E.tmp (54009 bytes)
%WinDir%\skype.exe (495597 bytes)
%Documents and Settings%\%current user%\Cookies\test@dropbox[1].txt (87 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab4A.tmp (48483 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015 (54009 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4D.tmp (146652 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4B.tmp (146652 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015 (216 bytes)
%Documents and Settings%\%current user%\Cookies\test@www.dropbox[1].txt (74 bytes)
%Documents and Settings%\%current user%\Cookies\index.dat (36864 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\RTEJ67TP\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (216 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4F.tmp (160255 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab4C.tmp (48483 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004 (18 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\RTEJ67TP\ms[1].exe (495597 bytes)
%Documents and Settings%\%current user%\Cookies\test@www.dropbox[2].txt (195 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\Cab4A.tmp (0 bytes)
%Documents and Settings%\%current user%\Cookies\test@www.dropbox[1].txt (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4D.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4B.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar4F.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab4C.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab4E.tmp (0 bytes)

The process rwlzsia.exe:848 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut49.tmp (116736 bytes)
%Documents and Settings%\%current user%\B14U21.PZ3 (92160 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut49.tmp (0 bytes)
%Documents and Settings%\%current user%\B14U21.PZ3 (0 bytes)

The process msn.exe:612 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Q71A28.GP4 (67072 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut50.tmp (68608 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Q71A28.GP4 (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut50.tmp (0 bytes)

The process msn.exe:260 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%WinDir%\csrss.exe (743966 bytes)

The process %original file name%.exe:384 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\desktop.ini (67 bytes)
%System%\rwlzsia.exe (850710 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)

The process %original file name%.exe:912 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut48.tmp (116736 bytes)
%Documents and Settings%\%current user%\B14U21.PZ3 (92160 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut48.tmp (0 bytes)
%Documents and Settings%\%current user%\B14U21.PZ3 (0 bytes)

The process skype.exe:156 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\W80P\msn.exe (870460 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\W80P\__tmp_rar_sfx_access_check_1740187 (0 bytes)

Registry activity

The process rwlzsia.exe:464 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\43DDB1FFF3B49B73831407F6BC8B975023D07C50]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 00 53 1D 1D"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\40E78C1D523D1CD9954FAC1A1AB3BD3CBAA15BFC]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 E6 0B D2 C9"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4B421F7515F6AE8A6ECEF97F6982A400A4D9224E]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 5A 11 B9 22"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4072BA31FEC351438480F62E6CB95508461EAB2F]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 70 B5 7C 48"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKCU\Software\Microsoft\yOLE]
"Supports RAS Connections" = "rwlzsia.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 2F 00 00 00 01 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\24A40A1F573643A67F0A4B0749F6A22BF28ABB6B]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 DD 75 3F 56"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4C95A9902ABE0777CED18D6ACCC3372D2748381E]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 4B 1C 56 8C"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\23E594945195F2414803B4D564D2A3A3F5D88B8C]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 C5 70 C4 A2"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\3F85F2BB4A62B0B58BE1614ABB0D4631B4BEF8BA]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 2A 5D 00 37"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\209900B63D955728140CD13622D8C687A4EB0085]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 1E 74 C3 86"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\24BA6D6C8A5B5837A48DB5FAE919EA675C94D217]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 7B B5 08 99"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4BA7B9DDD68788E12FF852E1A024204BF286A8F6]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 18 AE 69 5D"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\394FF6850B06BE52E51856CC10E180E882B385CC]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 AA BF BF 64"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\00EA522C8A9C06AA3ECCE0B4FA6CDC21D92E8099]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 3E 80 17 5B"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\0048F8D37B153F6EA2798C323EF4F318A5624A9E]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 15 B2 98 A3"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\SYSTEM\CurrentControlSet\Control\Lsa]
"Supports RAS Connections" = "rwlzsia.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\yOLE]
"Supports RAS Connections" = "rwlzsia.exe"

[HKLM\System\CurrentControlSet\Control\Lsa]
"Supports RAS Connections" = "rwlzsia.exe"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4463C531D7CCC1006794612BB656D3BF8257846F]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 74 7B 82 03"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\216B2A29E62A00CE820146D8244141B92511B279]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 E1 4B 52 73"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\284F55C41A1A7A3F8328D4C262FB376ED6096F24]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 01 1A 3F 4D"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\049811056AFE9FD0F5BE01685AACE6A5D1C4454C]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 F2 7D E9 54"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2F173F7DE99667AFA57AF80AA2D1B12FAC830338]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 AB BF EA E3"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4EFCED9C6BDD0C985CA3C7D253063C5BE6FC620C]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 85 2F F4 76"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%WinDir%]
"Skype.exe" = "skype"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 A9 23 75 9B"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\36863563FD5128C7BEA6F005CFE9B43668086CCE]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 3A B2 DE 22"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "70 34 C9 EC B3 BD 80 5D C9 92 D1 19 81 39 95 3A"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\273EE12457FDC4F90C55E82B56167F62F532E547]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 DB 23 3D F9"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2796BAE63F1801E277261BA0D77770028F20EEE4]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 91 DE 06 25"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\1331F48A5DA8E01DAACA1BB0C17044ACFEF755BB]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 50 E1 41 9D"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\43F9B110D5BAFD48225231B0D0082B372FEF9A54]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 25 9D CF 5E"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\0B77BEBBCB7AA24705DECC0FBD6A02FC7ABD9B52]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 26 6D 2C 19"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\0483ED3399AC3608058722EDBC5E4600E3BEF9D7]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 4C 56 41 E5"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\47AFB915CDA26D82467B97FA42914468726138DD]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 50 19 3E 2F"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\4EF2E6670AC9B5091FE06BE0E5483EAAD6BA32D9]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 03 42 87 D7"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\1F55E8839BAC30728BE7108EDE7B0BB0D3298224]
"Blob" = "04 00 00 00 01 00 00 00 10 00 00 00 8C D7 9F EB"

The Trojan modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices]
"Supports RAS Connections" = "rwlzsia.exe"

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Supports RAS Connections" = "rwlzsia.exe"

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Supports RAS Connections" = "rwlzsia.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Runservices]
"Supports RAS Connections" = "rwlzsia.exe"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

The Trojan deletes the following value(s) in system registry:

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates]
"43F9B110D5BAFD48225231B0D0082B372FEF9A54"
"4C95A9902ABE0777CED18D6ACCC3372D2748381E"
"0048F8D37B153F6EA2798C323EF4F318A5624A9E"
"3F85F2BB4A62B0B58BE1614ABB0D4631B4BEF8BA"
"273EE12457FDC4F90C55E82B56167F62F532E547"
"209900B63D955728140CD13622D8C687A4EB0085"
"4BA7B9DDD68788E12FF852E1A024204BF286A8F6"
"0B77BEBBCB7AA24705DECC0FBD6A02FC7ABD9B52"
"2796BAE63F1801E277261BA0D77770028F20EEE4"
"1F55E8839BAC30728BE7108EDE7B0BB0D3298224"
"049811056AFE9FD0F5BE01685AACE6A5D1C4454C"
"4463C531D7CCC1006794612BB656D3BF8257846F"
"40E78C1D523D1CD9954FAC1A1AB3BD3CBAA15BFC"
"24A40A1F573643A67F0A4B0749F6A22BF28ABB6B"
"4EFCED9C6BDD0C985CA3C7D253063C5BE6FC620C"
"36863563FD5128C7BEA6F005CFE9B43668086CCE"
"4B421F7515F6AE8A6ECEF97F6982A400A4D9224E"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyOverride"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates]
"216B2A29E62A00CE820146D8244141B92511B279"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyServer"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates]
"23E594945195F2414803B4D564D2A3A3F5D88B8C"
"47AFB915CDA26D82467B97FA42914468726138DD"
"317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6"
"00EA522C8A9C06AA3ECCE0B4FA6CDC21D92E8099"
"24BA6D6C8A5B5837A48DB5FAE919EA675C94D217"
"2F173F7DE99667AFA57AF80AA2D1B12FAC830338"
"43DDB1FFF3B49B73831407F6BC8B975023D07C50"
"284F55C41A1A7A3F8328D4C262FB376ED6096F24"
"1331F48A5DA8E01DAACA1BB0C17044ACFEF755BB"
"4072BA31FEC351438480F62E6CB95508461EAB2F"
"394FF6850B06BE52E51856CC10E180E882B385CC"
"4EF2E6670AC9B5091FE06BE0E5483EAAD6BA32D9"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"

[HKLM\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates]
"0483ED3399AC3608058722EDBC5E4600E3BEF9D7"

The process rwlzsia.exe:848 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E1 23 6E 07 9F 73 83 0E 8E F1 9F B9 E4 BD A7 9F"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

Task Manager is disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr" = "1"

The process msn.exe:612 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "18 3E C7 05 FC 9E 9E BC 8F EA 18 2D 0A CA DC FD"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

The process msn.exe:260 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "08 84 F9 5D AF 21 74 2A 23 88 FE 62 40 4F 85 BF"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Remote Registry Service" = "csrss.exe"

The process %original file name%.exe:384 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "B9 3E F7 FF A9 8A 81 1A EB CD C8 72 1B 22 23 C4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"

The process %original file name%.exe:912 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 69 CB CB 80 3F 5D 8E 38 B9 E1 D7 66 27 92 53"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

Task Manager is disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr" = "1"

The process ctfmon.exe:1224 makes changes in the system registry.
The Trojan deletes the following value(s) in system registry:
The Trojan disables automatic startup of the application by deleting the following autorun value:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"internat.exe"

The process skype.exe:156 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "75 34 7B 63 45 13 C4 7E 23 D8 69 26 BC A5 1A 99"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Документы"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Рабочий стол"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Рабочий стол"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\W80P]
"msn.exe" = "msn"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\Мои документы"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The Trojan modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

"UNCAsIntranet" = "1"

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

"ProxyBypass" = "1"

Network activity (URLs)

URL IP
hxxp://www.v.dropbox.com/s/b5ne62m4z1f3n0e/ms.exe?dl=1 (Malicious)
hxxp://a26.ms.akamai.net/msdownload/update/v3/static/trustedr/en/authrootseq.txt
hxxp://a26.ms.akamai.net/msdownload/update/v3/static/trustedr/en/authrootstl.cab
hxxp://a26.ms.akamai.net/msdownload/update/v3/static/trustedr/en/5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25.crt
hxxp://www.whatismyip.com/ 141.101.120.14
hxxp://checkip.dyndns.com/
checkip.dyndns.org 216.146.39.70
videos.p0rn-lover.us 176.31.75.42
www.download.windowsupdate.com 92.123.155.155
www.dropbox.com 108.160.166.142
dl.dropboxusercontent.com 107.21.221.217
vids.p0rn-lover.us 82.145.57.209


HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Trojan's file once a user opens a drive's folder in Windows Explorer.

A worm can spread its copies through the MSN Messanger.

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 525852 526336 4.63347 61ffce4768976fa0dd2a8f6a97b1417a
.rdata 532480 57280 57344 3.32693 0354bc5f2376b5e9a4a3ba38b682dff1
.data 589824 108376 26624 1.49032 8033f5a38941b4685bc2299e78f31221
.rsrc 700416 97456 97792 3.6072 f42b9c478a895498f7afeebc719b484d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    rwlzsia.exe:848
    msn.exe:612
    msn.exe:260
    %original file name%.exe:384
    %original file name%.exe:912
    skype.exe:156

  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Local Settings\Temp\Cab4E.tmp (54009 bytes)
    %WinDir%\skype.exe (495597 bytes)
    %Documents and Settings%\%current user%\Cookies\test@dropbox[1].txt (87 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Cab4A.tmp (48483 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015 (54009 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Tar4D.tmp (146652 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Tar4B.tmp (146652 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015 (216 bytes)
    %Documents and Settings%\%current user%\Cookies\test@www.dropbox[1].txt (74 bytes)
    %Documents and Settings%\%current user%\Cookies\index.dat (36864 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\RTEJ67TP\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (216 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Tar4F.tmp (160255 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Cab4C.tmp (48483 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004 (18 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\RTEJ67TP\ms[1].exe (495597 bytes)
    %Documents and Settings%\%current user%\Cookies\test@www.dropbox[2].txt (195 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\aut49.tmp (116736 bytes)
    %Documents and Settings%\%current user%\B14U21.PZ3 (92160 bytes)
    %Documents and Settings%\%current user%\Q71A28.GP4 (67072 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\aut50.tmp (68608 bytes)
    %WinDir%\csrss.exe (743966 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\desktop.ini (67 bytes)
    %System%\rwlzsia.exe (850710 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\aut48.tmp (116736 bytes)
    %Documents and Settings%\%current user%\W80P\msn.exe (870460 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices]
    "Supports RAS Connections" = "rwlzsia.exe"

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "Supports RAS Connections" = "rwlzsia.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "Supports RAS Connections" = "rwlzsia.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Runservices]
    "Supports RAS Connections" = "rwlzsia.exe"

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "Remote Registry Service" = "csrss.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
  7. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.