Analysis by: Anthony Joe Melgarejo
ALIASES:

Trojan:Win32/Trufip!rts (Microsoft), Trojan.Win32.Inject.alte (Kaspersky), Win32/LockScreen.FF trojan (NOD32)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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: 367,616 bytes
File Type: , EXE
Memory Resident: Yes
Initial Samples Received Date: 04 Sep 2011

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 and executes them:

  • %System%\csrsvc.exe
  • %System%\svccsr.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

NOTES:

It displays pornographic images whenever you attempt to terminate its process, blocking the view of your desktop.

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 7.154.04
FIRST VSAPI PATTERN DATE: 08 May 2010
VSAPI OPR PATTERN File: 7.155.00
VSAPI OPR PATTERN Date: 09 May 2010

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Scan your computer with your Trend Micro product and note files detected as TROJ_INJECT.ASY

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_INJECT.ASY. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


Did this description help? Tell us how we did.