- Threat Encyclopedia
- Malware
- TROJ64_VBUZKY.A
Trojan-Dropper.Win64.Vabushky.a (Kaspersky), Trojan.Ransomcrypt.E (Symantec), Win64/Vabushky.A trojan (ESET), Troj/Vabshky-A (Sophos)
Windows XP (64-bit), Windows Vista (64-bit), Windows 7 (64-bit)
Downloaded from the Internet, Dropped by other malware
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 injects its dropped file/component to specific processes.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Varies
EXE, DLL, SYS
Yes
08 Oct 2013
Steals information, Connects to URLs/IPs, Displays graphics/image
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 drops the following component file(s):
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
It injects its dropped file/component to the following processes:
Autostart Technique
This Trojan registers its dropped component as a system service to ensure its automatic execution at every system startup. It does this by creating the following registry entries:
HKEY_LOCAL_MACHINEsystem\currentcontrolset\services\
vBszKyhV
ImagePath = "%system%\drivers\vBszKyhV2.sys"
Other System Modifications
This Trojan modifies the following file(s):
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\vBszKyhV
Download Routine
This Trojan accesses the following websites to download files:
It saves the files it downloads using the following names:
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Information Theft
This Trojan gathers the following data:
Stolen Information
This Trojan sends the gathered information via HTTP POST to the following URL:
Other Details
This Trojan encrypts files with the following extensions:
NOTES:
This Trojan downloads the lock screen image from any of the following URLs depending on the system's screen resolution:
It attempts to use Shell_TrayWnd injection. It enables TESTSIGNING option of Windows 7. It then restarts the system after execution of all routines.
It displays the following lock screen image:
9.300
10.328.05
08 Oct 2013
10.329.00
08 Oct 2013
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
Identify and delete files detected as TROJ64_VBUZKY.A using either the Startup Disk or Recovery Console
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ64_VBUZKY.A. 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.