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PE_VIRUT.BO
Aliases: Virus:Win32/Virut.BL (Microsoft); W32/Virut.j (McAfee); W32.Virut!gen (Symantec); Virus.Win32.Virut.cd (Kaspersky); Win32.Virut.cd (v) (Sunbelt); Backdoor.Generic.696128 (FSecure)
Malware type: File infector
Destructive: No
Platform: Windows 2000, Windows XP, Windows Server 2003
In the wild: Yes

Overview


This file infector 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: 35,840 bytes
File type: EXE
Memory resident: No
Initial samples received date: 04 May 2012

Arrival Details

This file infector arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This file infector modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\SecurityProviders
SecurityProviders = "msapsspc.dll, schannel.dll, digest.dll, msnsspc.dll, OnrijleyRaqw.dll"

(Note: The default value data of the said registry entry is msapsspc.dll, schannel.dll, digest.dll, msnsspc.dll.)

Dropping Routine

This file infector drops the following files:

  • %System%\OnrijleyRaqw.dll

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.

Solution


Minimum scan engine: 9.200

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

Restore these modified registry values

[ Learn more ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.


  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SecurityProviders
    • From: SecurityProviders = "msapsspc.dll, schannel.dll, digest.dll, msnsspc.dll, OnrijleyRaqw.dll"
      To: SecurityProviders = ""msapsspc.dll, schannel.dll, digest.dll, msnsspc.dll""

Step 3

Search and delete this file

[ Learn more ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %System%\OnrijleyRaqw.dll

Step 4

Scan your computer with your Trend Micro product to clean files detected as PE_VIRUT.BO. 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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Analysis By: Automation

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