Analysis by: Mark Joseph Manahan
ALIASES:

Trojan horse Generic35.CHLZ (AVG) ,[Vault8WebServices.exe]:W32/Inject.JSRV!tr (Fortinet) ,Virus.Win32.CeeInject, Virus.Win32.CeeInject (Ikarus) ,Trojan.Win32.Inject.jsrv (Kaspersky) ,Trojan:Win32/Remhead (Microsoft) ,[2.nsis]:Downloader-FYH!B7248C89BE6A (McAfee) ,a variant of Win32/Injector.AZZA trojan, a variant of Win32/Injector.AZZA trojan (Eset) ,Trojan.Win32.Generic!BT (Sunbelt)

 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 may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 128,665 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 01 Apr 2014

Arrival Details

This Trojan may be dropped by other malware.

Installation

This Trojan drops the following files:

  • %User Temp%\setup.dat
  • %User Temp%\Vault8WebServices.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.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
{GUID} = "%User Temp%\Vault8WebServices.exe"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.17.32