Analysis by: Michael Cabel
 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.

It opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system. It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size: 24,576 bytes
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 14 Sep 2011
Payload: Steals information

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.

Backdoor Routine

This backdoor opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

It connects to the following websites to send and receive information:

  • {BLOCKED}.64.79
  • *.bestdeals.at

NOTES:

This backdoor Gathers the following system information from the affected system:

  • Computer Name
  • Date and time of infection
  • IP Address
  • OS Version and Build
  • System's Language

It may perform the following actions to the affected:

  • Delete files and folders
  • Download and execute files
  • List files and folders
  • List installed drives
  • Terminate process

  SOLUTION

Minimum Scan Engine: 9.200
FIRST VSAPI PATTERN FILE: 8.426.01
FIRST VSAPI PATTERN DATE: 14 Sep 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

Terminate a process file/s detected as BKDR_HUPIGON.ZUY

[ Learn More ]

*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as BKDR_HUPIGON.ZUY. 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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