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WORM_WISBIPUF.J

June 13, 2018
 ALIASES:

Worm:MSIL/Wisbipuf.C (Microsoft); Worm.MSIL.Agent (Ikarus)

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Worm 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:

713,216 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Jun 2018

Arrival Details

This Worm 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 Worm adds the following folders:

  • %System Root%\Configration
  • %System Root%\Configration\data
  • %System Root%\Configration\icons
  • %System Root%\Configration\links
  • %System Root%\Configration\setting

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

It drops the following files:

  • %System Root%\Configration\w2.zip
  • %System Root%\Configration\wbs.txt
  • %System Root%\Configration\icons.zip
  • %System Root%\Configration\icons
  • %System Root%\Configration\icons\doc.ico
  • %System Root%\Configration\icons\folder1.ico
  • %System Root%\Configration\icons\folder2.ico
  • %System Root%\Configration\icons\pdf.ico
  • %System Root%\Configration\icons\pic.ico
  • %System Root%\Configration\icons\sound.ico
  • %System Root%\Configration\icons\txt.ico
  • %System Root%\Configration\icons\vid.ico
  • %System Root%\Configration\icons\xlsx.ico
  • %System Root%\Configration\data\184.exe
  • %System Root%\Configration\info.txt
  • %System Root%\Configration\update.txt
  • %System Root%\Configration\setting\guide.txt
  • %System Root%\Configration\setting\power.txt
  • %System Root%\Configration\setting\gap.txt
  • %System Root%\Configration\df-start.txt
  • %System Root%\Configration\wbs-start.txt
  • %System Root%\Configration\lastup.txt
  • %System Root%\Configration\sign231.txt
  • %System Root%\Configration\data\backup.txt
  • %System Root%\Configration\newupdate.txt
  • %System Root%\Configration\newwbs.txt
  • %System Root%\Configration\oldwbs.exe

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

It drops and executes the following files:

  • %System Root%\Configration\w2.exe

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

Autostart Technique

This Worm modifies the following registry entry(ies) to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
w2 = "%System Root%\Configration\w2.exe"

Other System Modifications

This Worm adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Discardable\PostSetup\Component Categories\
{56FFCC30-D398-11D0-B2AE-00A0C908FA49}\Enum
Implementing = {hex values}

Other Details

This Worm connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.198.195
  • {BLOCKED}.{BLOCKED}.197.110

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.302.07

FIRST VSAPI PATTERN DATE:

08 Jun 2018

VSAPI OPR PATTERN File:

14.303.00

VSAPI OPR PATTERN Date:

09 Jun 2018

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • w2 = "%System Root%\Configration\w2.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Discardable\PostSetup\Component Categories\{random values}\Enum
    • Implementing = {hex values}

Step 5

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.
  • %System Root%\Configration

Step 6

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