BKDR_HUPIGON.ASF
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This backdoor 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
2,846,208 bytes
PE
Yes
17 Jan 2011
Arrival Details
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This backdoor drops the following component file(s):
- %System%\drivers\oreans32.sys
(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.)
Autostart Technique
This backdoor registers its dropped component as a system service to ensure its automatic execution at every system startup. It does this by creating the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\oreans32
ImagePath = %System%\drivers\oreans32.sys
Backdoor Routine
This backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:
- ttos{random numbers}.okebox.com
As of this writing, the said sites are inaccessible.
SOLUTION
8.900
7.774.09
17 Jan 2011
1/17/2011 12:00:00 AM
Step 1
Restart in Safe Mode
Step 2
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\SYSTEM\CurrentControlSet\Services\
- oreans32
- oreans32
Step 3
Search and delete this file
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_HUPIGON.ASF. 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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