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BKDR_AGENTT.GAT

October 08, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Backdoor.Win32.Agent.bfwi (Kaspersky); BDS/Agent.bfwi.1 (AntiVir); Backdoor.Agent.bfwi (Vba32)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This backdoor 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:

72,192 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

16 Feb 2011

Arrival Details

This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This backdoor does the following:

  • Sends information about the computer to the address specified in the first command-line parameter through the port specified in the second command-line parameter. If a third and fourth command-line parameter were specified, it connects via a proxy server specified in the third command-line parameter through the port specified in the fourth command-line parameter.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

7.840.05

FIRST VSAPI PATTERN DATE:

16 Feb 2011

VSAPI OPR PATTERN File:

7.841.00

VSAPI OPR PATTERN Date:

17 Feb 2011

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

Identify and terminate files detected as BKDR_AGENTT.GAT

[ 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 3

Scan your computer with your Trend Micro product to delete files detected as BKDR_AGENTT.GAT. 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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