Analysis by: Nikko Tamana
 Modified by: Jennifer Gumban
 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: 3,870 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 17 Dec 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.

Download Routine

This Trojan downloads the file from the following URL and renames the file when stored in the affected system:

  • http://{BLOCKED}b.{BLOCKED}n.com/jbbgxf/?f=xcxg

It saves the files it downloads using the following names:

  • {Malware Path}\draw.fas

NOTES:

It deletes {Malware Path}\draw.fas after execution.

Using AutoCADs search path, it first reads the file ACAD.DCL. It then uses the said file to search for another file named ACAD.FAS in the AutoCAD support folder.

It searches for Errors.Err in the current folder and deletes it.

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.478.07
FIRST VSAPI PATTERN DATE: 17 Dec 2013
VSAPI OPR PATTERN File: 10.479.00
VSAPI OPR PATTERN Date: 18 Dec 2013

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to clean files detected as ACM_NEYER.NIL. 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.


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