Backdoor.Win32.Kelihos_dbd2f07a60

by malwarelabrobot on August 2nd, 2013 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Backdoor.Win32.Kelihos.FD, (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: dbd2f07a60392d2d3ed68c368212ecd4
SHA1: 1678d26b188c8e40a2d171400a1562df06d7dc9f
SHA256: 5244411c81af8d129665c82b4507b5b1cf8c9f25cbf830c909c25f8c1ca670df
SSDeep: 768:LV20m82QQfnu3e4DwHQGX6pDleRIfYypZ2 M lJ1nrbx0OhIy re3C:LVufxDHkPeRyJe3 v13x9h1 cC
Size: 78336 bytes
File type: PE32
Platform: WIN32
Entropy: Not Packed
PEID: BorlandDelphi30; UPolyXv05_v6
Company: AirInstaller Inc.
Created at: 2004-09-24 10:13:27


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):

dbd2f07a60392d2d3ed68c368212ecd4.exe:1792

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

temp63.exe:1040

File activity

The process dbd2f07a60392d2d3ed68c368212ecd4.exe:1792 makes changes in a file system.
The Backdoor creates and/or writes to the following file(s):

%WinDir%\Temp\temp63.exe (6407 bytes)

The process temp63.exe:1040 makes changes in a file system.
The Backdoor deletes the following file(s):

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

Registry activity

The process dbd2f07a60392d2d3ed68c368212ecd4.exe:1792 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8A 41 60 35 91 9B 7A 42 57 2A C5 2E B7 57 8C 1F"

The process temp63.exe:1040 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "78 07 83 95 31 85 3C 11 0A 62 05 E9 16 7D 34 32"

[HKCU\Software\Microsoft\Notepad]
"sizeCompletedValid" = "DHglXAk0FP7 zBsLPnMqgLpA0Vh0QYNgzDTIztrJbrnFYBlg9F56Dkak8RumGB9qow=="

[HKCU\Software\Sysinternals\Process Monitor]
"UrlEnabledUse" = "80"

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

[HKLM\System\CurrentControlSet\Services\nm\Parameters]
"ComputerName" = "XP9"

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

[HKCU\Software\Sysinternals\Process Monitor]
"FlagsModifiedValid" = "00 00 00 00 00 00 00 00"

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

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

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

[HKCU\Software\Microsoft\Internet Explorer\Main]
"PersistentLocalizedName" = "E9 80 F9 7F 7A 3F BA 73 A5 39 CE 22 25 D9 24 6D"

[HKCU\Software\Sysinternals\Process Monitor]
"DefaultCompressedRecord" = "E9 80 F9 7F 73 7F 53 9B 3A B4 BF 13 A8 71 62 9D"

[HKCU\Software\Microsoft\Notepad]
"activeModifiedTheme" = "E9 80 F9 7F 87 A0 C2 60 53 50 2E 02 89 0E 8A 3F"

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

[HKCU\Software\Sysinternals\Process Monitor]
"RecordModifiedMax" = "DHglXAk0FP7 zBsLPnMqgLpA0Vh0QYNgzDTIztrJbrnFYBlg9F56Dkak8RumGB9qow=="

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

[HKCU\Software\Microsoft\Internet Explorer\Main]
"LineLoadedQuick" = "DHglXAk0FP7 zBsLPnMqgLpA0Vh0QYNgzDTIztrJbrnFYBlg9F56Dkak8RumGB9qow=="

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\temp63.exe"

Network activity (URLs)

URL IP
hxxp://ditojtap.ru/moon004.exe (Malicious)
hxxp://116.83.30.109/login.htm
hxxp://116.83.30.109/main.htm
hxxp://54.228.197.200/


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):

    dbd2f07a60392d2d3ed68c368212ecd4.exe:1792

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

    %WinDir%\Temp\temp63.exe (6407 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\temp63.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.