ALIASES:

Backdoor:Win32/Delf.DU (Microsoft); Exploit-Mydoom (McAfee); Virus.Win32.Lamer.k (Kaspersky); Troj/ZXC-P (Sophos); Backdoor.Win32.Delf.DU (v) (Sunbelt); Trojan horse BackDoor.Generic2.XKW (AVG)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • 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: 99,031 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 11 Jul 2015

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.

Installation

This backdoor drops the following copies of itself into the affected system:

  • %Windows%\win32dc\Counter-Strike_crack.exe
  • %Windows%\win32dc\Half-Life 2_serial.exe
  • %Windows%\win32dc\Doom 3(cdfix).exe
  • %Windows%\win32dc\Quake3 + patch.exe
  • %Windows%\win32dc\Sims 2 + trainer.exe
  • %Windows%\win32dc\BattleField 1942 hack.exe
  • %Windows%\win32dc\Half-Life 2(cdfix).exe
  • %Windows%\win32dc\Quake3_hack.exe
  • %Windows%\win32dc\Doom 3_trainer.exe
  • %Windows%\win32dc\DAoC(cdfix).exe

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It creates the following folders:

  • %Windows%\win32dc

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • {BLOCKED}.182.1

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.750

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

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Windows%\win32dc

Step 3

Scan your computer with your Trend Micro product to delete files detected as BKDR_IRCBOT.WPIA. 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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