BKDR_POISON.TM
WS.Reputation.1 (Symantec)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Via email, Downloaded from the Internet, Dropped by other malware
This backdoor monitors user activities and records messages posted to the system message queue which may include keystrokes to steal user information such as username and password.
This backdoor arrives as attachment to mass-mailed email messages. It may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.
It opens a hidden Internet Explorer window. It connects to a website to send and receive information.
TECHNICAL DETAILS
356,352 bytes
PE
Yes
08 Aug 2012
Steals information
Arrival Details
This backdoor arrives as attachment to mass-mailed email messages.
It may be dropped by other malware.
It may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This backdoor drops the following copies of itself into the affected system:
- %System%\ViewScript.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It injects threads into the following normal process(es):
- EXPLORER.EXE
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Adobe ViewScript = "%System%\ViewScript.exe"
Backdoor Routine
This backdoor opens a hidden Internet Explorer window.
It connects to the following websites to send and receive information:
- abcd120807.{BLOCKED}2.org
NOTES:
This backdoor monitors user activities and records messages posted to the system message queue which may include keystrokes to steal user information such as username and password.
SOLUTION
8.900
9.312.03
09 Aug 2012
9.313.00
10 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
Restart in Safe Mode
Step 3
Delete this registry key
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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Adobe ViewScript = "%System%\ViewScript.exe"
- Adobe ViewScript = "%System%\ViewScript.exe"
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_POISON.TM. 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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