Analysis by: Anthony Joe Melgarejo
ALIASES:

VirTool:Win32/CeeInject (Microsoft), Win32.Malware!Drop (Sunbelt), W32/Injector.AFKG (Fortinet), Trojan.SuspectCRC (Ikarus), Win32/Injector.AFKG trojan (ESET)

 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: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

This Trojan executes then deletes itself afterward.

As of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 40,968 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 18 Apr 2013
Payload: Downloads files

Arrival Details

This Trojan may be unknowingly downloaded by a user while visiting the following malicious websites:

  • http://{BLOCKED}.{BLOCKED}.123.44/news.html

Installation

This Trojan executes then deletes itself afterward.

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • Xi3FVneIx

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}dgemarathon.com/z.htm?qxH5FATQhit2PzMD9U2vdeD7mEplE
  • http://{BLOCKED}kfatcatclassic.com/j.htm?zEwt7oQAM6GxrAWDwEnlp1MMjr
  • http://{BLOCKED}erryonthe.net/j.htm?gJhlRcwdShaLpxHgZKhje3biMeiWXi1
  • http://{BLOCKED}i.com/n.htm?DedORNjwGH5xYyhqSMqebHkaXLhakJruUu KY1j
  • http://{BLOCKED}nrecordings.com/i.htm?1wDg6bS8MzvoprjDTFHphg7wwLPVZ

As of this writing, the said sites are inaccessible.

NOTES:
It pings the host 192.168.123.254.

  SOLUTION

Minimum Scan Engine: 9.300

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 delete files detected as TROJ_DLDR.USR. 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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