Where to Buy Trend Micro Products

For Home

For Small Business

1-888-762-8736
(M-F 8:00am-5:00pm CST)

For Enterprise

1-877-218-7353
(M-F 8:00am-5:00pm CST)

Not in the United States?
Select the country/language of your choice:

Asia Pacific Region

Europe

The Americas

Not in the United States?
Select the country/language of your choice:

Asia/Pacific

Europe

America

Login

For Home

For Business

For Partners

Threat Encyclopedia

PE_QUERVAR.D-O

ANALYSIS BY

Jasen Sumalapao


ALIASES:

Trojan.Exprez.B (Symatec), Mal/Behav-104 (Sophos)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type:File infector

  • Destructiveness:No

  • Encrypted:

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.354.01

FIRST VSAPI PATTERN DATE:

28 Aug 2012

VSAPI OPR PATTERN File:

9.355.00

VSAPI OPR PATTERN Date:

28 Aug 2012

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

Scan your computer with your Trend Micro product and note files detected as PE_QUERVAR.D-O

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete these folders

[ 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.
  • %User Profile%\Application Data\{Random Folder}

Step 5

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_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows
    • From: Load = "%User Profile%\Application Data\{Random Folder}\{Random File name}.EXE.LNK"
      To: Load = ""

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as PE_QUERVAR.D-O. 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.


Did this description help? Tell us how we did.

Featured Stories

Connect with us on