WORM_OTORUN.HZR
Windows 2000, XP, Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This worm drops copies of itself in all 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
28,160 bytes
PE
Yes
26 Feb 2009
Installation
This worm drops the following copies of itself into the affected system:
- %System Root%\RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
(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\k-1-3542-4232123213-7676767-8888886
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
It is injected into the following processes running in memory:
- explorer.exe
Other System Modifications
This worm adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{67KLN5J0-4OPM-00WE-AAX5-77EF1D187563}
StubPath = %System Root%\RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
Propagation
This worm drops copies of itself in all 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.
The said .INF file contains the following strings:
[AutoRun]
open=RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
icon=%SystemRoot%\system32\SHELL32.dll,4
action=Open folder to view files
shell\open=Open
shell\open\command=RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
shell\open\default=1
SOLUTION
8.900
05.868.03
26 Feb 2009
2/26/2009 12:00:00 AM
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 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\SOFTWARE\Microsoft\Active Setup\Installed Components\{67KLN5J0-4OPM-00WE-AAX5-77EF1D187563}
- StubPath = %System Root%\RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
- StubPath = %System Root%\RESTORE\k-1-3542-4232123213-7676767-8888886\SysBsm.exe
Step 4
Search and delete AUTORUN.INF files created by WORM_OTORUN.HZR that contain these strings
Step 5
Search and delete these folders
Step 6
Scan your computer with your Trend Micro product to delete files detected as WORM_OTORUN.HZR. 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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