Backdoor.Win32.Kelihos_c65cca5266

by malwarelabrobot on July 29th, 2013 in Malware Descriptions.

Trojan-Downloader.Win32.Agent.yecs (Kaspersky), Trojan.Win32.Generic!SB.0 (VIPRE), Trojan-Downloader.Agent!IK (Emsisoft), Backdoor.Win32.Kelihos.FD, (Lavasoft MAS)
Behaviour: Trojan-Downloader, 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: c65cca52661ecb12f61250507c735972
SHA1: d3f4e660af648064e2039d0f09e220f0a193148d
SHA256: cd47893d77139a0edf67aa5be5e49bbbb42001daab5529687e05e018507b4476
SSDeep: 1536:p4LDow55ltJSOaPwt/lWzfr2DYTK35Lq:4jaPgAzCDYT6m
Size: 64000 bytes
File type: PE32
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2005-01-31 23:01:08


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):

c65cca52661ecb12f61250507c735972.exe:520

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

temp03.exe:608

File activity

The process c65cca52661ecb12f61250507c735972.exe:520 makes changes in a file system.
The Backdoor creates and/or writes to the following file(s):

%WinDir%\Temp\temp03.exe (1728512 bytes)

The process temp03.exe:608 makes changes in a file system.
The Backdoor deletes the following file(s):

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

Registry activity

The process c65cca52661ecb12f61250507c735972.exe:520 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "ED 34 23 05 90 92 D8 EF 8A 26 4C B2 11 91 CD 3A"

The process temp03.exe:608 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "83 7F 04 96 A6 79 65 A2 E1 B8 C8 4E 56 B8 4E 93"

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

[HKCU\Software\Sysinternals\Process Monitor]
"LineLoadedQuick" = "DA/YR5Vbsg9W8MlMlZLVu3z pz124Db6FZUtYMJJYqbq2zu7h/W/x5pzq40johk4JQ=="

[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]
"InfoPlayedCurrent" = "00 00 00 00 00 00 00 00"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"FlagsModifiedValid" = "00 00 00 00 00 00 00 00"

[HKCU\Software\Sysinternals\Process Monitor]
"DBSavedUse" = "A2 49 4D F3 D9 1E 9F 88 01 01 08 61 00 02 01 10"

[HKCU\Software\Microsoft\Internet Explorer\Main]
"SizeCompletedValid" = "DA/YR5Vbsg9W8MlMlZLVu3z pz124Db6FZUtYMJJYqbq2zu7h/W/x5pzq40johk4JQ=="

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"RecordModifiedMax" = "DA/YR5Vbsg9W8MlMlZLVu3z pz124Db6FZUtYMJJYqbq2zu7h/W/x5pzq40johk4JQ=="

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

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

[HKCU\Software\Microsoft\Internet Explorer\Main]
"ActiveModifiedTheme" = "E9 80 F9 7F 87 E2 EE B1 43 09 39 35 C3 05 ED 96"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"DefaultCompressedRecord" = "E9 80 F9 7F 73 70 60 26 B3 1E 6F F7 D0 11 E7 16"

[HKCU\Software\Sysinternals\Process Monitor]
"PersistentLocalizedName" = "E9 80 F9 7F 7A AC 92 56 1C CD 0B 32 72 49 48 91"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"UrlEnabledUse" = "80"

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\temp03.exe"

Network activity (URLs)

URL IP
hxxp://tovledif.ru/angrim2.exe (Malicious)
hxxp://37.229.247.49/login.htm (Malicious)
hxxp://37.229.247.49/welcome.htm (Malicious)
hxxp://95.211.192.204/XUDLGY
hxxp://54.228.191.146/XUDLGY
hxxp://89.45.14.31/XUDLGY
hxxp://103.31.186.21/XUDLGY
hxxp://141.101.121.191/XUDLGY


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):

    c65cca52661ecb12f61250507c735972.exe:520

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

    %WinDir%\Temp\temp03.exe (1728512 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\temp03.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.