BKDR_POISON.BII
Backdoor:Win32/Poison.E (Microsoft)
Windows 2000, Windows, XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor connects to a website to send and receive information.
TECHNICAL DETAILS
Arrival Details
This backdoor may be downloaded from the following remote sites:
- http://b.{BLOCKED}24.net/download/Flash_update.exe
Installation
This backdoor drops the following copies of itself into the affected system:
- %Windows%\svchost.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{D7D5C4D2-2F41-E5E7-276F-CB99B06A7E58}
StubPath = %Windows%\svchost.exe
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- {BLOCKED}a.{BLOCKED}24.net
SOLUTION
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 value
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\SOFTWARE\Microsoft\Active Setup\Installed Components\{D7D5C4D2-2F41-E5E7-276F-CB99B06A7E58}
- StubPath = %Windows%\svchost.exe
- StubPath = %Windows%\svchost.exe
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_POISON.BII. 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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