Virus:Win32/Valla.2048 (Microsoft); W32/Valla.a (McAfee); W32.Valla.2048 (Symantec); Virus.Win32.Xorala (Kaspersky); Valla.a (v) (Sunbelt); Win32/Valla.2048 (AVG)
Windows 2000, Windows XP, Windows Server 2003
This file infector arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Arrival Details
This file infector arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Other System Modifications
This file infector adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
winmine
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Difficulty = "0"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Height = "9"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Width = "9"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Mines = "a"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Mark = "1"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
AlreadyPlayed = "1"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Color = "1"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Sound = "0"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Xpos = "5"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Ypos = "5"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Time1 = "3e7"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Time2 = "3e7"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Time3 = "3e7"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Name1 = "Anonymous"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Name2 = "Anonymous"
HKEY_CURRENT_USER\Software\Microsoft\
winmine
Name3 = "Anonymous"
This report is generated via an automated analysis system.
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
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.
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.
Step 4
Scan your computer with your Trend Micro product to clean files detected as PE_VALLA.A. 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.