WORM_IRCBOT.SZP
Worm:Win32/Hamweq.A (Microsoft), Spyware.ADH (Symantec), W32/Sdbot.worm.gen.cr (McAfee), Trojan-Dropper.Win32.Champ.alo (Kaspersky)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm arrives via removable drives.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
TECHNICAL DETAILS
Arrival Details
This worm arrives via removable drives.
Installation
This worm drops the following copies of itself into the affected system:
- %System Root%\Restore\{random SID}\Ogard.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It drops the following files:
- %System Root%\Restore\{random SID}\Desktop.ini
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It creates the following folders:
- %System Root%\Restore\{random SID}
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{67KLN5J0-4OPM-00WE-AAX5-77EF1D187322}
StubPath = "%System Root%\RESTORE\k-1-3542-4232123213-7676767-8888886\Ogard.exe"
Other System Modifications
This worm adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{67KLN5J0-4OPM-00WE-AAX5-77EF1D187322}
Propagation
This worm drops the following copy(ies) of itself in all removable drives:
- {removable drive letter}:\RESTORE\{random SID}\Ogard.exe
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
open=RESTORE\{random SID}\Ogard.exe
icon=%SystemRoot%\system32\SHELL32.dll,4
action=Open folder to view files
shell\open=Open
shell\open\command=RESTORE\{random SID}\Ogard.exe
shell\open\default=1
SOLUTION
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
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.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components
- {67KLN5J0-4OPM-00WE-AAX5-77EF1D187322}
- {67KLN5J0-4OPM-00WE-AAX5-77EF1D187322}
Step 4
Search and delete this folder
Step 5
Search and delete AUTORUN.INF files created by WORM_IRCBOT.SZP that contain these strings
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as WORM_IRCBOT.SZP. 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.
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