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TROJ_DLOADER.ANK

January 10, 2014
 Analysis by: Ardin Christopher Maglalang
 ALIASES:

Troj/Agent-AFLI(Sophos), Trojan horse Generic35.BCUC(AVG), HEUR:Trojan.Win32.Generic(Kaspersky), a variant of Win32/Injector.AUTJ trojan(ESET)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan 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:

98105 bytes

File Type:

EXE

Initial Samples Received Date:

08 Jan 2014

Arrival Details

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

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\{Random Letters}
License = "{Value}"

HKEY_LOCAL_MACHINE\Software\{Random Letters}
License = "{Value}"

Download Routine

This Trojan saves the files it downloads using the following names:

  • %User Temp%\Java_Update_{Value}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}warding.com/b/shoe/{number}

It attempts to access the following websites to download files, which are possibly malicious:

  • http://{BLOCKED}ay.com/jquery/ajax/
  • http://{BLOCKED}ay.com/jquery/animate/