WORM_ZEROLL.AY
Win32/VBInject.gen!GN (Microsoft), Backdoor.Win32.LolBot.buxz (Kaspersky), Win32/Injector.GSH (ESET)
Windows
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
47,104 bytes
EXE
23 Sep 2013
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:
- %Application Data%\HEX-5823-6393-6818\jusched.exe
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
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\Run
Java Update Manager = “%Application Data%\HEX-5823-6393-6818\jusched.exe”
Other System Modifications
This worm adds the following registry entries:
HKEY_LOCAL_MACHINE\System\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Application Data%\HEX-5823-6393-6818\jusched.exe = “%Application Data%\HEX-5823-6393-6818\jusched.exe:*: Enabled:Jave Update Manager”
Propagation
This worm creates the following folders in all removable drives:
- {removable drive letter}:\8585485
It drops the following copy(ies) of itself in all removable drives:
- {removable drive letter}:\8585485\{folder name}.exe
Dropping Routine
This worm drops the following files:
- %System%\winrtsnr.txt
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Other Details
This worm connects to the following possibly malicious URL:
- http://updates.{BLOCKED}ks.co.in