Backdoor.Win32.Kelihos_06174d98e0

by malwarelabrobot on August 22nd, 2013 in Malware Descriptions.

Trojan-Downloader.Win32.Genome.ekbd (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Backdoor.Win32.Kelihos.FD, mzpefinder_pcap_file.YR (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: 06174d98e0a436a673784ead664ccefe
SHA1: 7c99d26cf8f62b6f674a77e9e64c9781cf6c7c40
SHA256: 507f90d4d73c1b3aa9bfd7f292ad0787dc1f7dfff7abaa1b2d816d2d80a7f23b
SSDeep: 3072:awSHfP486g3PwR3s92OQqdgh9QFcnGDl2iW8ws:al4MPC3sRJgTQFBlL7v
Size: 162782 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2005-09-13 06:35:49


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):

06174d98e0a436a673784ead664ccefe.exe:548

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

temp00.exe:1560

File activity

The process 06174d98e0a436a673784ead664ccefe.exe:548 makes changes in a file system.
The Backdoor creates and/or writes to the following file(s):

%WinDir%\Temp\temp00.exe (7386 bytes)

The process temp00.exe:1560 makes changes in a file system.
The Backdoor deletes the following file(s):

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

Registry activity

The process 06174d98e0a436a673784ead664ccefe.exe:548 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "30 7B BE E4 47 65 52 53 F7 01 D1 98 DC 1B A6 40"

The process temp00.exe:1560 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "20 7D 7C 00 3B EE 1C C5 7D 10 F4 8C D3 D7 14 4E"

[HKCU\Software\Microsoft\Notepad]
"sizeCompletedValid" = "DL6JqqEOd7WQxhRnjIMhROLNaPnyBqW6MvyJ24Z4qsF5yV2ZvIAUlsAl3qaqSv0drg=="

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

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

[HKLM\System\CurrentControlSet\Services\nm\Parameters]
"ComputerName" = "XP10"

[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" = "F7 80 F9 7F 7A 7A F8 76 54 2A A5 18 E7 4E DC 5B"

[HKCU\Software\Sysinternals\Process Monitor]
"DefaultCompressedRecord" = "F7 80 F9 7F 73 4E 23 FF B3 5D 14 08 09 6A 5E 73"

[HKCU\Software\Microsoft\Notepad]
"activeModifiedTheme" = "F7 80 F9 7F 87 D7 82 09 DD 13 9D 2B 44 75 88 D1"

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

[HKCU\Software\Sysinternals\Process Monitor]
"RecordModifiedMax" = "DL6JqqEOd7WQxhRnjIMhROLNaPnyBqW6MvyJ24Z4qsF5yV2ZvIAUlsAl3qaqSv0drg=="

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

[HKCU\Software\Microsoft\Internet Explorer\Main]
"LineLoadedQuick" = "DL6JqqEOd7WQxhRnjIMhROLNaPnyBqW6MvyJ24Z4qsF5yV2ZvIAUlsAl3qaqSv0drg=="

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\temp00.exe"

Network activity (URLs)

URL IP
hxxp://fokgiiqh.nl/angrim2.exe (Malicious) 93.77.181.128


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):

    06174d98e0a436a673784ead664ccefe.exe:548

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

    %WinDir%\Temp\temp00.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\temp00.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.