BKDR_FARFLI.ABH

October 09, 2012
 Modified by: Sabrina Lei Sioting
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

262,144 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

24 Feb 2012

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This backdoor drops the following files:

  • %System Root%\Game.exe
  • %System Root%\Common\Utility.dll
  • %Program Files%\Jpxv\Hhafqonho.jpg

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

It creates the following folders:

  • %System Root%\Common
  • %Program Files%\Jpxv

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

Other System Modifications

This backdoor adds the following registry entries as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
sougou = Otklkp Pqumryac Jlb

HKEY_LOCAL_MACHINE\SOFTWARE\281052745
ImagePath = "%System%\svchost.exe -k sougou"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_OTKLKP_PQUMRYAC_JLB\
0000
Service = "Otklkp Pqumryac Jlb"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
sougou = "Otklkp Pqumryac Jlb"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Otklkp Pqumryac Jlb
ImagePath = "%System%\svchost.exe -k sougou"

It adds the following registry keys as part of its installation routine:

HKEY_LOCAL_MACHINE\SOFTWARE\281052745

HKEY_LOCAL_MACHINE\SOFTWARE\323830095

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Enum\Root\LEGACY_OTKLKP_PQUMRYAC_JLB

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Otklkp Pqumryac Jlb

Other Details

This backdoor connects to the following possibly malicious URL:

  • {BLOCKED}22.org