Analysis by: Cris Nowell Pantanilla
 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

It connects to a specific site to send the system information.

It connects to the following site to receive commands from a remote user.

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 17,920 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 23 Feb 2012

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_DROPR.TYGS

NOTES:

It connects to the following site to send the following system information:

  • http://{BLOCKED}.{BLOCKED}.202.198/jp/log2.asp?flag:{data} host:{hostname} ip:{IP address} os:{OS name}sp{Service Pack} vm:{data} proxy:{Proxy Server} pro:{Running Process}

It connects to the following site to receive commands from a remote user:

  • {BLOCKED}ek.myfw.us

It is performs the following commands:

  • Create files
  • Disconnect from server
  • Execute Files
  • List All Running processes
  • Remote Command Prompt
  • Uninstall
Write to File

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.796.02
FIRST VSAPI PATTERN DATE: 23 Feb 2012
VSAPI OPR PATTERN File: 8.797.00
VSAPI OPR PATTERN Date: 24 Feb 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

Remove malware files dropped/downloaded by BKDR_AGENT.TYGS

     TROJ_DROPR.TYGS

Step 3

Identify and terminate files detected as BKDR_AGENT.TYGS

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_AGENT.TYGS. 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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