TrojanDownloader:HTML/Chipow.A(Microsoft); Trojan-Downloader.HTML.Agent.abo(Kaspersky); HLP/Agent.XCS!tr.dldr(Fortinet)
This Trojan arrives as attachment to mass-mailed email messages. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This Trojan arrives as attachment to mass-mailed email messages.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This Trojan connects to the following website(s) to download and execute a malicious file:
It saves the files it downloads using the following names:
The help file showed when the chm file is opened:
While the message is shown, the malware runs the following commands in the background to download TROJ_UPATRE.HM:
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Search and delete these files
Scan your computer with your Trend Micro product to clean files detected as CHM_DLOADER.DBN. 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.