BKDR_ANDROM.DEW
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
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
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 copies of itself into the affected system:
- %User Profile%\xoxugnirkean.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
xoxugnirkean = "%User Profile%\xoxugnirkean.exe"
Other System Modifications
This backdoor adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\WinRAR
HWID = "{random numbers}"
HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{random data}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
AppManagement = "{random data}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
xoxugnirkeanzap = "{random data}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
{random numbers} = "{random data}"
Other Details
This backdoor connects to the following possibly malicious URL:
- {BLOCKED}.227.233/gate.php
SOLUTION
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
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- xoxugnirkean = "%User Profile%\xoxugnirkean.exe"
- xoxugnirkean = "%User Profile%\xoxugnirkean.exe"
- In HKEY_CURRENT_USER\Software\WinRAR
- HWID = "{random numbers}"
- HWID = "{random numbers}"
- In HKEY_CURRENT_USER\Software\WinRAR
- Client Hash = "{random data}"
- Client Hash = "{random data}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- AppManagement ="{random data}"
- AppManagement ="{random data}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- xoxugnirkeanzap = "{random data}"
- xoxugnirkeanzap = "{random data}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- {random numbers} = "{random data}"
- {random numbers} = "{random data}"
Step 4
Search and delete this file
- %User Profile%\xoxugnirkean.exe
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_ANDROM.DEW. 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.
Did this description help? Tell us how we did.