TROJ_DOFOIL.KW
Mal/Zbot-LB (Sophos), W32/Yakes.B!tr (Fortinet), W32/Yakes.K2.gen!Eldorado (FProt), Trojan-Downloader.Win32.Dofoil (Ikarus), TrojanDownloader:Win32/Dofoil.R (Microsoft), a variant of Win32/Kryptik.AVAW trojan (NOD32), Trojan-Downloader.Win32.Dofoil (Sunbelt)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 attempts to access certain websites. However, the websites are inaccessible as of this writing. It deletes the initially executed copy of itself.
TECHNICAL DETAILS
Arrival Details
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.
Other Details
This Trojan attempts to access certain websites. However, the websites are inaccessible as of this writing.
It connects to the following URL(s) to check for an Internet connection:
- www.update.microsoft.com.nsatc.net
It connects to the following possibly malicious URL:
- http://{BLOCKED}okucall2.org/tmp2/index.php
It deletes the initially executed copy of itself
SOLUTION
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DOFOIL.KW. 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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