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WORM_GANIPIN.AA

October 08, 2012
 Analysis by: kathleenno
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

57,344 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 Jun 2009

Installation

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

  • %Windows%\system\smss.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Autostart Technique

This worm registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\NTService
ImagePath = %Windows%\system\smss.exe

Propagation

This worm drops copies of itself in all removable 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=Important.FILES.EXE
shell\open=´ò¿ª(&O)
shell\open\Command=Important.FILES.EXE
shell\open\Default=1
shell\explore=×ÊÔ´¹ÜÀíÆ÷(&X)
shell\explore\Command=Important.FILES.EXE

  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

Restart in Safe Mode

[ Learn More ]

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
    • NTService

Step 4

Search and delete AUTORUN.INF files created by WORM_GANIPIN.AA that contain these strings

[ Learn More ]
[autorun]
OPEN=Important.FILES.EXE
shell\open=´ò¿ª(&O)
shell\open\Command=Important.FILES.EXE
shell\open\Default=1
shell\explore=×ÊÔ´¹ÜÀíÆ÷(&X)
shell\explore\Command=Important.FILES.EXE

Step 5

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