Backdoor.Win32.Kelihos_d5a59963b7

by malwarelabrobot on September 16th, 2013 in Malware Descriptions.

Trojan.Sinowal.Gen.1 (BitDefender), HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Waledac.r (v) (VIPRE), Trojan.DownLoader6ENT.380 (DrWeb), Trojan.Sinowal.Gen.1 (B) (Emsisoft), GenericATG-FGF!D5A59963B7BC (McAfee), Crypt_s.DEP (AVG), Backdoor.Win32.Kelihos.FD, mzpefinder_pcap_file.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: d5a59963b7bcc4a6dc363b034eac94e6
SHA1: f60922d90e9f4e200b720ac21e46e752f50c2b5d
SHA256: 19a81f5a8ec141d9a9a20cc88bcdb187f44eca7f625fb73f9c2cfe4a61cad4ad
SSDeep: 3072:MBvRIxbjtW 5 eO1qxXDODvyYIDseYgmkdLdRYSadT:2Gx5O1qxXDODvyYIDseYgmk/RH
Size: 224222 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: SummerSoft
Created at: 2004-01-23 21:57:52


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):

d5a59963b7bcc4a6dc363b034eac94e6.exe:832

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

temp15.exe:1932

File activity

The process temp15.exe:1932 makes changes in a file system.
The Backdoor deletes the following file(s):

%WinDir%\Temp\tmp.exe (0 bytes)

The process d5a59963b7bcc4a6dc363b034eac94e6.exe:832 makes changes in a file system.
The Backdoor creates and/or writes to the following file(s):

%WinDir%\Temp\temp15.exe (7386 bytes)

Registry activity

The process temp15.exe:1932 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AF B7 2F A7 F3 A8 12 8A 95 9D 82 37 07 33 0F A3"

[HKCU\Software\Microsoft\Notepad]
"sizeCompletedValid" = "DOx5UStRkNzVPwHJtTgL5hl0SiGQKs/dJ8QOfSCi4KV024E/cHAvJOHPGIQ/SH1XLg=="

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"RecordModifiedMax" = "DOx5UStRkNzVPwHJtTgL5hl0SiGQKs/dJ8QOfSCi4KV024E/cHAvJOHPGIQ/SH1XLg=="

[HKCU\Software\Microsoft\Internet Explorer\Main]
"PlatformCompressedValid" = "00 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"UrlEnabledUse" = "80"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"FlagsModifiedValid" = "00 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Notepad]
"infoPlayedCurrent" = "00 00 00 00 00 00 00 00"

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

[HKCU\Software\Microsoft\Internet Explorer\Main]
"DBSavedUse" = "A2 49 4D F3 D9 1E 9F 88 01 01 08 61 00 02 01 10"

[HKLM\System\CurrentControlSet\Services\nm\Parameters]
"ComputerName" = "XP1"

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

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

[HKCU\Software\Microsoft\Notepad]
"styleModifiedPrev" = "80"

[HKLM\System\CurrentControlSet\Services\nm\Parameters]
"EnableStationQueries" = "1"

[HKCU\Software\Microsoft\Internet Explorer\Main]
"PersistentLocalizedName" = "D6 80 F9 7F 7A FB A0 5F 1F 11 E4 0D B6 CD 59 8C"

[HKCU\Software\Microsoft\Internet Explorer\Main]
"LineLoadedQuick" = "DOx5UStRkNzVPwHJtTgL5hl0SiGQKs/dJ8QOfSCi4KV024E/cHAvJOHPGIQ/SH1XLg=="

[HKCU\Software\Microsoft\Notepad]
"activeModifiedTheme" = "D6 80 F9 7F 87 DD 6E 67 51 6B 02 6B E0 BF A4 53"

[HKCU\Software\Microsoft\Internet Explorer\Main]
"RecordEnabledCheck" = "80"

[HKLM\System\CurrentControlSet\Services\nm\Parameters]
"UserName" = "%CurrentUserName%"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"DefaultCompressedRecord" = "D6 80 F9 7F 73 29 57 65 30 27 C1 0F D0 59 2A 0F"

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]
"NetworkSaver" = "%WinDir%\Temp\temp15.exe"

The process d5a59963b7bcc4a6dc363b034eac94e6.exe:832 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4F E0 91 D9 AA 7A 43 AA 66 6C 3F 35 88 A0 D8 2B"

Network activity (URLs)

URL IP
hxxp://ivynvov.net/keybex4.exe (Malicious)
hxxp://37.229.57.246/index.htm (Malicious)
hxxp://37.229.57.246/login.htm (Malicious)
hxxp://54.246.84.147/PZONXX
hxxp://54.228.191.146/PZONXX


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):

    d5a59963b7bcc4a6dc363b034eac94e6.exe:832

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

    %WinDir%\Temp\temp15.exe (7386 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "NetworkSaver" = "%WinDir%\Temp\temp15.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.