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This Trojan connects to certain URLs to send and receive commands from a remote malicious user. It terminates processes, some of which are related to system security.
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
This Trojan injects itself into the following processes running in the affected system's memory:
It creates the following folders:
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other System Modifications
This Trojan deletes the following registry keys:
This Trojan drops the following files:
This Trojan deletes itself after execution.
It accesses the following site to know its location:
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.
Remove malware files dropped/downloaded by TROJ_SIREFEF.SZP
Restart in Safe Mode
To restart in Safe Mode:
• For Windows 2000 users
• For Windows XP users
• For Windows Server 2003 users
Search and delete these folders
To delete malware/grayware folders:
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SIREFEF.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.
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
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