Analysis by: Abraham Latimer Camba
ALIASES:

Trojan:ALisp/Gofas.C (Microsoft), Trojan.Acad.Qfas.b (Kaspersky), ACAD/Qfas.B trojan (ESET), AL/Logo-A (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This is Trend Micro's detection for AutoCAD LISP (list processing language) files distributed as an AutoCad FAS file exhibiting malicious behavior.

This behavior may include the following:

  • Drop a copy of itself
  • Drop other files
  • Search and modify certain files

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: 3,000 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 26 Jun 2012

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.

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 9.220.05
FIRST VSAPI PATTERN DATE: 27 Jun 2012
VSAPI OPR PATTERN File: 9.221.00
VSAPI OPR PATTERN Date: 28 Jun 2012

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 to delete files detected as ACM_QFAS.ERO. 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.