WORM_AUTORUN.ZBB
Worm:Win32/Autorun.gen!BS (Microsoft); W32/IRCbot.gen.aq (McAfee); Backdoor.Graybird (Symantec); PAK:UPX, Backdoor.Win32.Iroffer.fj (Kaspersky); Trojan.Win32.Ircbot!cobra (v) (Sunbelt); Trojan:W32/Agent.FJR (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
231,768 bytes
EXE
No
05 Aug 2012
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:
- %System Root%\explore.exe
- %System%\svchost.exe
- %System%\Panel sterowania.{21EC2020-3AEA-1069-A2DD-08002B30309D}\winlogon.dll
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
It creates the following folders:
- %System%\Panel sterowania.{21EC2020-3AEA-1069-A2DD-08002B30309D}
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This worm modifies the following file(s):
- %System%\wupdmgr.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\CreateProcess
Description = "CreateProcess win32 API call"
Dropping Routine
This worm drops the following files:
- %System Root%\autorun.inf
- %System%\explorxp.exe
- %System%\settings.dll
- %System%\svchost.exe
- %System%\Panel sterowania.{21EC2020-3AEA-1069-A2DD-08002B30309D}\winlogon.dll
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
This report is generated via an automated analysis system.
SOLUTION
9.200
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 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_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\CreateProcess
- Description = "CreateProcess win32 API call"
Step 3
Search and delete these components
- %System Root%\autorun.inf
- %System%\explorxp.exe
- %System%\settings.dll
- %System%\svchost.exe
- %System%\Panel sterowania.{21EC2020-3AEA-1069-A2DD-08002B30309D}\winlogon.dll
Step 4
Search and delete this folder
- %System%\Panel sterowania.{21EC2020-3AEA-1069-A2DD-08002B30309D}
Step 5
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.ZBB. 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.
Step 6
Restore deleted/modified files and/or registry entries from backup
*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- %System%\wupdmgr.exe
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