WORM_HUPIGON.ZXX

October 08, 2012
 Analysis by: Sabrina Lei Sioting
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This worm drops copies of itself in all physical drives. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

It opens a hidden Internet Explorer window.

  TECHNICAL DETAILS

File Size:

778356 bytes

File Type:

PE

Memory Resident:

No

Initial Samples Received Date:

05 Jun 2010

Installation

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

  • %Program Files%\_windows.exe
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\windows.exe
  • [drive letter]:\windows.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

Propagation

This worm drops copies of itself in all physical drives.

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

[AutoRun]
open=windows.exe
shellexecute=windows.exe
shell\Auto\command=windows.exe

Backdoor Routine

This worm opens a hidden Internet Explorer window.

  SOLUTION

Minimum Scan Engine:

8.900

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 WORM_HUPIGON.ZXX

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
    • Windows

Step 4

Scan your computer with your Trend Micro product to delete files detected as WORM_HUPIGON.ZXX. 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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