Analysis by: Nikko Tamana
ALIASES:

W32/FakeAV.KLA!tr (Fortinet), Trojan.Win32.FakeAV (Ikarus), Rogue:Win32/Winwebsec (Microsoft)

 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:

  • 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: 462,848 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 25 Feb 2013

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.

Installation

This Trojan drops the following copies of itself into the affected system:

  • {All User's Profile}\Application Data\{random folder name}\{random file name}.exe

It drops the following files:

  • {All User's Profile}\Application Data\{random folder name}\{random file name}.ico
  • %Desktop%\Disk Antivirus Professional.lnk
  • %Start Menu%\Programs\Disk Antivirus Professional\Disk Antivirus Professional.lnk

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

It creates the following folders:

  • %Start Menu%\Programs\Disk Antivirus Professional
  • {All User's Profile}\Application Data\{random folder name}

(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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
{random file name} = "{All User's Profile}\Application Data\{random folder name}\{random file name}.exe"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}payme.com/p/?
  • http://{BLOCKED}w-safe.com/p/?
  • http://{BLOCKED}rketpay.com/p/?
  • http://{BLOCKED}lingpay.com/p/?
  • http://{BLOCKED}ysafe.com/p/?
  • http://{BLOCKED}e-bill.com/p/?
  • http://{BLOCKED}utbiz.com/p/?
  • http://{BLOCKED}ersec.com/p/?
  • http://{BLOCKED}me.com/p/?
  • http://{BLOCKED}s.{BLOCKED}support.net/?
  • http://{BLOCKED}.{BLOCKED}.225.41/api/urls/?ts=3d8e232030b4873d37fbbb5241ee51d91d0afe8c
  • http://{BLOCKED}.{BLOCEKD}.225.41/api/urls/?ts=3d8e232030b4873d37fbbb5241ee51d91d0afe8c&affid=51800
  • http://{BLOCKED}.{BLOCKED}.225.41/api/stats/install/?ts=3d8e232030b4873d37fbbb5241ee51d91d0afe8c&affid=51800&ver=3070025&group=dap
  • http://{BLOCKED}.{BLOCKED}.225.41/api/stats/install/?ts=3d8e232030b4873d37fbbb5241ee51d91d0afe8c