BKDR_HUPIGON.MPE
Backdoor.Win32.Hupigon.axor (Kaspersky), Backdoor.Hupigon.AXRD (BitDefender)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
However, as of this writing, the said sites are inaccessible. It deletes the initially executed copy of itself.
TECHNICAL DETAILS
655,872 bytes
EXE
No
28 Nov 2012
Arrival Details
This Trojan 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 Trojan drops a copy of itself in the following folders using different file names:
- %System%\_svrhost.exe
- %Program Files%\Common Files\Microsoft Shared\MSINFO\svrhost.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Autostart Technique
This Trojan adds and runs the following services:
- svrhost
Other System Modifications
This Trojan adds the following registry keys:
HKLM\SYSTEM\CurrentControlSet\
services\svrhost
It adds the following registry entries:
HKLM\SYSTEM\CurrentControlSet\
services\svrhost
Description = "Windows WorkGroup"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
(Default) = ""
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
Description = "Windows WorkGroup"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
DisplayName = "Windows WorkGroup"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
ImagePath = "%Program Files%\Common Files\microsoft shared\MSInfo\svrhost.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\svrhost
Type = "272"
Propagation
This Trojan drops the following copy of itself in all physical and removable drives:
- {Drive Letter}:\svrhost.exe
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
Other Details
This Trojan connects to the following possibly malicious URL:
- http://quiniao.{BLOCKED}p.net
However, as of this writing, the said sites are inaccessible.
It deletes the initially executed copy of itself
SOLUTION
9.800
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Disable this malware service
- svrhost
Step 4
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.
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
- svrhost
- svrhost
Step 5
Search and delete this file
- {Drive Letter}:\AutoRun.inf
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_HUPIGON.MPE. 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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