WORM_WALEDAC.ALS
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: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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 worm 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 worm drops the following copies of itself into the affected system and executes them:
- %Windows%\services.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It drops the following component file(s):
- %Windows%\adobe.bat
- %Windows%\file.bat
- %Windows%\_id.dat
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
services = "%Windows%\services.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
services = "%Windows%\services.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
services = "%Windows%\services.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
services = "%Windows%\services.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\services
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\WindowsFirewall
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\WindowsFirewall\DomainProfile
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\WindowsFirewall\StandardProfile
It adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\services
del = ""
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\WindowsFirewall\DomainProfile
EnableFirewall = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\WindowsFirewall\StandardProfile
EnableFirewall = "0"
Other Details
This worm connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.7.194/spm/s_config.php?ver=%7bvalues%7d&id=%7bvalues%7d
- http://{BLOCKED}.{BLOCKED}.7.194/spm/s_alive.php?id=%7bvalues%7d
- http://{BLOCKED}.{BLOCKED}.7.194/spm/get_id.php
- {BLOCKED}7.{BLOCKED}0.yahoodns.net
- aol.com
- {BLOCKED}-01.{BLOCKED}x.aol.com
- {BLOCKED}-02.{BLOCKED}x.aol.com
- {BLOCKED}-03.mx.aol.com
- {BLOCKED}-04.mx.aol com
- google.com
- {BLOCKED}1.{BLOCKED}x.l.google.com
- {BLOCKED}3.{BLOCKED}x.l.google.com
- {BLOCKED}2.{BLOCKED}x.l.google.com
- {BLOCKED}4.{BLOCKED}x.l.google.com
- {BLOCKED}x.{BLOCKED}.google.com
- mail.com
- {BLOCKED}0.{BLOCKED}x.com
- {BLOCKED}1.{BLOCKED}x.com