Analysis by: Anthony Joe Melgarejo
 ALIASES:

Troj/Agent-YZC (Sophos), W32/ATRAPS.DSA!tr (Fortinet), Trojan.ATRAPS (Ikarus)

 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

Tipo de compactação: 73,728 bytes
Tipo de arquivo: EXE
Residente na memória: Yes
Data de recebimento das amostras iniciais: 05 Oct 2012

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.

NOTES:

Once executed, this malware checks for command line arguments:

  • Ntvdm.exe {URL1} {Port1} {URL2} {Port2}
Where:
  • {URL1} and {URL2} = sites where the malware will connect
  • {Port1} and {Port2} = ports that will be used for connecting

It may require other components to properly execute.

  SOLUTION

Mecanismo de varredura mínima: 9.300
Primeiro arquivo padrão VSAPI: 9.576.02
Data do lançamento do primeiro padrão VSAPI: 06 Dec 2012
VSAPI OPR Pattern Version: 9.577.00
VSAPI OPR Pattern veröffentlicht am: 06 Dec 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

Scan your computer with your Trend Micro product and note files detected as BKDR_ATRAPS.DSA

Step 3

Identify and terminate files detected as BKDR_ATRAPS.DSA

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. 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.
  3. 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_ATRAPS.DSA. 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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