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Threat Encyclopedia

BKDR_POISON.BLW

ANALYSIS BY

Jasen Sumalapao


ALIASES:

Backdoor:Win32/Poison.E (Microsoft), Trojan.Win32.Agent.tkql (Kaspersky), Generic PWS.y!1ij (NAI), Troj/Agent-XNE (Sophos), Trojan.Win32.Generic!BT (Sunbelt), TR/Spy.16896.281 (Antivir), Gen:Trojan.Heur.FU.bqW@a4uT4@bb (Bitdefender), W32/Agent.TKQL!tr (Fortinet), Virus.Worm.Koobface (Ikarus), Win32/Poison.NHM trojan (NOD32), Trj/StartPage.DAW (Panda), Trojan-PSW.Win32.Nilage (VBA32)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type:Backdoor

  • Destructiveness:No

  • Encrypted: Yes

  • In the wild: Yes

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.352.06

FIRST VSAPI PATTERN DATE:

28 Aug 2012

VSAPI OPR PATTERN File:

9.353.00

VSAPI OPR PATTERN Date:

28 Aug 2012

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

Scan your computer with your Trend Micro product and note files detected as BKDR_POISON.BLW

Step 3

Remove malware/grayware files that dropped/downloaded BKDR_POISON.BLW

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Delete the registry entry with an unknown data value

[ 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\Control\Session Manager
    • PendingFileRenameOperations = "%User Temp%\{random file name}.dat"

Step 6

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