Analysis by: Roland Marco Dela Paz
ALIASES:

Trj/Hrup.J (Panda); Backdoor.Win32.Protux.qr (Kaspersky)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 311,808 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 05 Nov 2010
Payload: Connects to URLs/Ips

Arrival Details

This Trojan may be dropped by the following malware:

  • TROJ_MDROPPR.AH

Installation

This Trojan drops and executes the following files:

  • %System%\wuausrv.dll - also detected as TROJ_DINGU.B

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

NOTES:
This Trojan connects to the following website to send and receive information:

  • jap.{BLOCKED}sky.com

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.597.00
VSAPI OPR PATTERN Date: 05 Nov 2010

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 TROJ_DINGU.B

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DINGU.B. 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.

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_DINGU.B. 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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