Analysis by: Sabrina Lei Sioting
ALIASES:

Trojan-Downloader.Win32.Agent.gxld (Kaspersky), Trojan:Win32/Sluegot.C (Microsoft)

 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 is capable of exhibiting certain behaviors based on commands received from a remote malicious user.

This backdoor may be downloaded by other malware/grayware from remote sites.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size: 33,829 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 02 Jul 2011
Payload: Executes certain behaviors

Arrival Details

This backdoor may be downloaded by the following malware/grayware from remote sites:

  • TROJ_DLOADR.LGO

Installation

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

  • letusgohtppmmv2.0.0.1

Backdoor Routine

This backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:

  • http://{BLOCKED}5.39.39/safe/1.asp?rands=A{random}&acc=&str=select%20id%20from%20tab_online

However, as of this writing, the said sites are inaccessible.

As of this writing, the said sites are inaccessible.

NOTES:

It is capable of exhibiting the following behaviors based on commands received from a remote malicious user:

  • Download a file
  • Upload a file
  • Delete a file
  • Put the system to sleep
  • Execute a file
  • Kill a process
  • List all running processes
  • Uninstall a program

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 8.262.01
FIRST VSAPI PATTERN DATE: 02 Jul 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

Remove malware files dropped/downloaded by BKDR_SLUEGOT.A

Step 3

Terminate a malware/grayware process

[ Learn More ]

*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.

    update.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_SLUEGOT.A. 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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