TrojanSpy.Win32.KRACHULKA.BYY
GenericRXHB-OW!B3DA25A25775 (McAfee); Trojan.Gen.2 (Symantec); LooksLike.Win32.InfectedFile!B (v) (Sunbelt)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan Spy 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
6,746,784 bytes
DLL
Yes
07 Apr 2020
Arrival Details
This Trojan Spy 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 Spy creates the following folders:
- %Windows%\SysWOW64\LOG
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Other System Modifications
This Trojan Spy adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Direct3D\MostRecentApplication
Name = "rundll32.exe"
Dropping Routine
This Trojan Spy drops the following files:
- %Windows%\SysWOW64\LOG\rundll32.exe.DEBUG.log
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
This report is generated via an automated analysis system.
SOLUTION
9.850
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 2
Delete this registry value
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.
- In HKEY_CURRENT_USER\Software\Microsoft\Direct3D\MostRecentApplication
- Name = "rundll32.exe"
Step 3
Search and delete this file
- %Windows%\SysWOW64\LOG\rundll32.exe.DEBUG.log
Step 4
Search and delete this folder
- %Windows%\SysWOW64\LOG
Step 5
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.KRACHULKA.BYY. 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 the following Trend Micro Support pages for more information:
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