Ransom.Win64.IRONLOCKER.A.go
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
2,078,720 bytes
EXE
UPX
Yes
29 Mar 2023
Connects to URLs/IPs, Drops files, Modifies system registry
Arrival Details
This Ransomware 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 Ransomware drops the following files:
- %Windows%\Help\list.log
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It adds the following processes:
- bcdedit /set {current} safeboot minimal <- boots Windows into safe mode
- shutdown -f -r -t 0 <- forced shutdown and restart
Other System Modifications
This Ransomware adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
MSlogon
CustomSource = 1
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
MSlogon
EventMessageFile = %SystemRoot%\System32\EventCreate.exe
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\eventlog\Application\
MSlogon
TypesSupported = 7
Download Routine
This Ransomware connects to the following URL(s) to download its component file(s):
- http://cgh8mfervgto8tr8q9egpdwrqii45tmjb.{BLOCKED}t.me/hh.aspx?h={random incrementing number)
Other Details
This Ransomware adds and runs the following services:
MSlogon
MSlogon = {Malware file path}\{Malware file name}.exe
However, as of this writing, the said sites are inaccessible.
SOLUTION
9.800
18.378.02
12 Apr 2023
18.379.00
13 Apr 2023
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
-
Troj.Win32.TRX.XXPE50FFF067
Step 2
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 3
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 4
Disable this malware service
- MSlogon
Step 5
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_LOCAL_MACHINE\SYSTEM\ControlSet001\services\eventlog
- Application = MSlogon
- Application = MSlogon
Step 6
Search and delete this file
Step 7
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.IRONLOCKER.A.go. 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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