Backdoor.Win32.Cycbot_e6c3f6cd5d

by malwarelabrobot on January 25th, 2014 in Malware Descriptions.

Gen:Variant.Kazy.56036 (BitDefender), Backdoor:Win32/Cycbot.B (Microsoft), HEUR:Trojan.Win32.Generic (Kaspersky), Backdoor.Win32.Cycbot.G (v) (VIPRE), BackDoor.Gbot.2017 (DrWeb), Gen:Variant.Kazy.56036 (B) (Emsisoft), BackDoor-EXI.gen.ah (McAfee), Backdoor.Cycbot!gen10 (Symantec), Backdoor.Win32.Cycbot (Ikarus), Gen:Variant.Kazy.56036 (FSecure), Win32/Cryptor (AVG), Win32:Cycbot-SF [Trj] (Avast), TROJ_SPNR.11C112 (TrendMicro), Backdoor.Win32.Cycbot.FD, Trojan.Win32.Alureon.FD, Trojan.Win32.Swrort.3.FD, BackdoorCycbot.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor


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

Summary
Technical Details
Removal Recommendations

MD5: e6c3f6cd5dc04381b1b366b1f018d652
SHA1: 7af2a541fddef5b294a433d6da6fed5e717aa220
SHA256: 4a2cd2674d5f51c0bc64cb89ad591b236806742e47f77bed76a28e95db6d4f77
SSDeep: 6144:j9HzliC CCfFmNmthPnaj3CGRK55axRxPVyf66BzTH cxM:j9L 7f2mX/aj3hk5ebPEf66Bz7 c
Size: 282624 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: Rapiddown
Created at: 2005-09-03 23:03:44
Analyzed on: WindowsXP SP3 32-bit


Summary:

Backdoor. Malware that enables a remote control of victim's machine.

Payload

No specific payload has been found.

Process activity

The Backdoor creates the following process(es):

%original file name%.exe:444
%original file name%.exe:1736
msiexec.exe:1256

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

1.tmp:660
%original file name%.exe:384

File activity

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

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%System%\config\SOFTWARE.LOG (2467 bytes)
%System%\config\software (963 bytes)
%Program Files%\LP\D1F5\1.tmp (12588 bytes)
%Documents and Settings%\%current user%\Application Data\507CF\F2C6.07C (3946 bytes)
%Program Files%\LP\D1F5\C29.exe (270066 bytes)

Registry activity

The process 1.tmp:660 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BF 90 3E C5 83 3B A4 D6 C1 A4 F5 A2 C0 B9 BD 25"

[HKCR\TypeLib\{1EA4DBF0-3C3B-11CF-810C-00AA00389B71}\1.1\0\win32]
"(Default)" = "%System%\oleacc.dll"

[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" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[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" = "65452"
"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" = "65452"

[HKCU\Software\WinRAR]
"HWID" = "7B 44 35 44 30 31 35 31 35 2D 30 31 39 42 2D 34"

The process %original file name%.exe:444 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "48 11 24 8C 24 AA 98 37 77 B3 1F 3E 1D 31 03 49"

[HKCR\TypeLib\{1EA4DBF0-3C3B-11CF-810C-00AA00389B71}\1.1\0\win32]
"(Default)" = "%System%\oleacc.dll"

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

[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" = "65452"
"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 16 00 00 00 03 00 00 00 14 00 00 00"

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

"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\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

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

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

[HKCR\TypeLib\{1EA4DBF0-3C3B-11CF-810C-00AA00389B71}\1.1\0\win32]
"(Default)" = "%System%\oleacc.dll"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyServer" = "http=127.0.0.1:57333"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F4 37 6A F4 EC 91 D1 98 50 64 30 4F E0 F8 D4 35"

[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" = "65452"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"DefaultConnectionSettings" = "3C 00 00 00 03 00 00 00 03 00 00 00 14 00 00 00"

[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"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"C29.exe" = "%Program Files%\LP\D1F5\C29.exe"

Automatic startup of the following service is disabled:

[HKLM\System\CurrentControlSet\Services\wscsvc]
"Start" = "3"

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

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

The process %original file name%.exe:1736 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "53 32 F7 52 09 64 89 A1 B7 78 72 39 C2 B8 12 A6"

[HKCR\TypeLib\{1EA4DBF0-3C3B-11CF-810C-00AA00389B71}\1.1\0\win32]
"(Default)" = "%System%\oleacc.dll"

The process msiexec.exe:1256 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "CB 9A BC 40 D1 3A CE A6 4B 55 A7 97 C7 A1 65 E1"

Network activity (URLs)

URL IP
hxxp://0n9ye8mntm.datastoreplus.com/logo.png?sv=900&tq=gKZEtzoYwLzEvUb5dQzRsrCpBfUoTca3l74EgC5OjrPGpgfib1XFp5zpRPksUt+A/gSoSEU= 69.43.161.170
hxxp://23.60.133.163/pca3.crl
hxxp://e6845.ce.akamaiedge.net/CSC3-2009-2.crl
hxxp://TRANSERSDATAFORME.COM/gate.php (ET CNC Zeus/Spyeye/Palevo Tracker Reported CnC Server (group 6) , Malicious)
hxxp://a26.d.akamai.net/msdownload/update/v3/static/trustedr/en/authrootseq.txt
hxxp://a26.d.akamai.net/msdownload/update/v3/static/trustedr/en/authrootstl.cab
hxxp://23d.yourfreshstorage.com/logo.png?sv=248&tq=gKZEtzoYwLzEvUb5dQzRsrCpBfUoTca3l74EgC9OjrPGpgfib1XFp5zpRPksUt+A/gSoSEU= 50.116.35.251
www.download.windowsupdate.com 69.31.102.98
transersdataforme.com 192.155.89.148
csc3-2009-2-crl.verisign.com 23.61.181.163


HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation


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):

    %original file name%.exe:444
    %original file name%.exe:1736

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

    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %System%\config\SOFTWARE.LOG (2467 bytes)
    %System%\config\software (963 bytes)
    %Program Files%\LP\D1F5\1.tmp (12588 bytes)
    %Documents and Settings%\%current user%\Application Data\507CF\F2C6.07C (3946 bytes)
    %Program Files%\LP\D1F5\C29.exe (270066 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "C29.exe" = "%Program Files%\LP\D1F5\C29.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Reboot the computer.

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