Windows
This Coinminer arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency.
Arrival Details
This Coinminer arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Autostart Technique
This Coinminer adds and runs the following services:
Other System Modifications
This Coinminer deletes the following files:
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\SasaiKudasai
Content = {Base64 encoded string}
HKEY_LOCAL_MACHINE\SOFTWARE\SasaiKudasai
Vendor = {Base64 encoded string}
HKEY_LOCAL_MACHINE\SOFTWARE\SasaiKudasai
Version = {contents of xm64.txt/xm86.txt which are encrypted coin mining component}
Other Details
This Coinminer does the following:
It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency. This behavior makes the system run abnormally slow.
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
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
Restart in Safe Mode
Step 4
Disable this malware service
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.
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Coinminer_MALXMR.DB-PS. 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.
