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This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This backdoor creates the following folders:
This backdoor opens the following ports:
It connects to the following URL(s) to send and receive commands from a remote malicious user:
This backdoor connects to the following URL(s) to download its component file(s):
It saves the files it downloads using the following names:
This backdoor drops the following file(s)/component(s):
This backdoor requires the application Windows PowerShell to execute properly.
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Restart in Safe Mode
To restart in Safe Mode:
• For Windows 2000 users
• For Windows XP users
• For Windows Server 2003 users
• For Windows Vista and Windows 7 users
Search and delete these files
To delete malware/grayware files:
Restart in normal mode and scan your computer with your Trend Micro product for files detected as VBS_CRIGENT.LK. 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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