TROJ_RENOS.ZL
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan may be unknowingly downloaded by a user while visiting malicious websites.
It uses the Windows Task Scheduler to add a scheduled task that executes the copies it drops.
It may create registry entries under a certain registry key.
TECHNICAL DETAILS
Arrival Details
This Trojan may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This Trojan drops the following files:
- %WINDOWS%\Tasks\{BBAEAEAF-1275-40e2-BD6C-BC8F88BD114A}.job
It uses the Windows Task Scheduler to add a scheduled task that executes the copies it drops.
Other System Modifications
This Trojan adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\NtWqIVLZEWZU
Cja{number} = "{dword value}"
HKEY_CURRENT_USER\Software\NtWqIVLZEWZU
Cmo1 = "{base64 encoded}"
It may create registry entries under the following registry key:
HKEY_CURRENT_USER\Software\NtWqIVLZEWZU
NOTES:
Other Details
It attempts to access the following URLs to possibly download other malicious files into the system:
- {BLOCKED}eh.com
- {BLOCKED}s.com
- {BLOCKED}nline.com
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
Terminate the malware/grayware/spyware process:
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_CURRENT_USER\Software\
- NtWqIVLZEWZU
Step 4
Search and delete this file
- %WINDOWS%\Tasks\{BBAEAEAF-1275-40e2-BD6C-BC8F88BD114A}.job
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_RENOS.ZL. 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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