TROJ_BANLOAD.YWNFC
TrojanDownloader:Win32/Banload.BAL (Microsoft); Downloader (Symantec); Trojan-Downloader.Win32.VB.hlya (Kaspersky); Mal/VB-YZ (Sophos); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Downloader.Banload2.YNB (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
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:
- %User Profile%\Application Data/Microsoft/toulouse
- %User Profile%\Application Data/Microsoft/getafeshell
- %System Root%/foldext
- %System Root%/foldext/e1052e3d51
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
Dropping Routine
This Trojan drops the following files:
- %User Profile%\toulouse\k1.bin
- %User Startup%\1b525eac45a31b16c0.lnk
- %System Root%\foldext\e1052e3d51\id.html
- %User Startup%\ddea04ca4a.lnk
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.{BLOCKED}k.com.br/petrol/upf5.txt
- http://www.{BLOCKED}k.com.br/petrol/sh.txt
- http://www.{BLOCKED}2.com/petrolavisos.php?IDMAQ=CWS09D003&DATA=Wilbert
- http://www.{BLOCKED}k.com.br/petrol/jquery.min.txt
- http://www.{BLOCKED}k.com.br/petrol/manifest.txt
- http://www.{BLOCKED}k.com.br/petrol/bg.txt
- http://www.{BLOCKED}k.com.br/petrol/explain.txt
- http://www.{BLOCKED}k.com.br/petrol/manifest.php
- {BLOCKED}.237.104
- {BLOCKED}.17.5
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 these components
- %User Profile%\toulouse\k1.bin
- %User Startup%\1b525eac45a31b16c0.lnk
- %System Root%\foldext\e1052e3d51\id.html
- %User Startup%\ddea04ca4a.lnk
Step 3
Search and delete these folders
- %User Profile%\Application Data/Microsoft/toulouse
- %User Profile%\Application Data/Microsoft/getafeshell
- %System Root%/foldext
- %System Root%/foldext/e1052e3d51
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_BANLOAD.YWNFC. 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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