TROJ_ZEGOST.USVV
TrojanDownloader:Win32/Farfli!rfn (Microsoft); RDN/Generic Downloader.x (McAfee); Trojan.Gen (Symantec); Trojan-Downloader.Win32.Dupzom.amo (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Generic14.BNJL (AVG)
Windows
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.
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.
Installation
This Trojan creates the following folders:
- %Program Files%\AppPatch
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Dropping Routine
This Trojan drops the following files:
- %Program Files%\AppPatch\Syst.dll
(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.99.245:9292/Syst.jpg
This report is generated via an automated analysis system.
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
Search and delete this file
- %Program Files%\AppPatch\Syst.dll
Step 3
Search and delete this folder
- %Program Files%\AppPatch
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_ZEGOST.USVV. 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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