TROJ_ALUREON.WXA
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
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.
TECHNICAL DETAILS
114,176 bytes
EXE
Yes
25 Apr 2014
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 the following files:
- %User Temp%\{random folder name 1}\{random folder name 2}\wow.dll
- %User Temp%\{random folder name 1}\{random folder name 2}\wow.ini
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It creates the following folders:
- %User Temp%\{random folder name 1}
- %User Temp%\{random folder name 1}\{random folder name 2}
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Other System Modifications
This Trojan adds the following registry entries as part of its installation routine:
KEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\EFS\
CurrentKeys
numbackupattempts = "4294967295"
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}c.com:81
- http://{BLOCKED}5.com:81
- http://{BLOCKED}.{BLOCKED}.192.215:81
- http://{BLOCKED}.{BLOCKED}.174.45:81
SOLUTION
9.700
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
Search and delete these folders
- %User Temp%\{random folder name 1}
- %User Temp%\{random folder name 1}\{random folder name 2}
Step 4
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 KEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\EFS\CurrentKeys
- numbackupattempts = "4294967295"
- numbackupattempts = "4294967295"
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