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:
- %User Temp%\{random}\{random}.0.cs
- %User Temp%\{random}\{random}.dll
- %User Temp%\{random}\{random}.cmdline
- %User Temp%\{random}\{random}.out
- %User Temp%\{random}\{random}.err
- %User Temp%\mn.exe
- %User Temp%\kk4.log
- %User Temp%\{random numbers}.bat
- %User Temp%\aio.EXE
(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.)
It adds the following processes:
- "%Windows%\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"%User Temp%\{random}\{random}.cmdline"
- %System%\whoami.exe" /user
- %System%\getmac.exe" /FO CSV
- %System%\cmd.exe" /c "schtasks /query /tn "\Microsoft\windows\00-0C-29-93-5D-CF" || schtasks /create /ru system /sc MINUTE /mo 45 /st 07:00:00 /tn "\Microsoft\windows\00-0C-29-93-5D-CF" /tr "powershell -nop -ep bypass -e {Base-64 encoded}" /F"
- %System%\ipconfig.exe" /all
- %System%\ipconfig.exe" /displaydns
- %System%\NETSTAT.EXE" -ano
(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.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://p.{BLOCKED}h.com/upgrade.php?ver=3&mac=00-0C-29-93-5D-CF&av=&ver=6.1.7601&bit=32-bit
- http://v.{BLOCKED}h.net/g?h190322
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
Identify and terminate files detected as Trojan.PS1.LUDICROUZ.A
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- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
To terminate the malware/grayware/spyware process:
- Scan your computer with your Trend Micro product and take note of the name of the malware/grayware/spyware detected.
- Open Windows Task Manager. To do this, press CTRL+SHIFT+ESC.
- View the list of all running programs. To do this:
• For Windows 2000, XP, Server 2003, Vista, 7 and Server 2008 users, click the Processes tab.
• For Windows 8, 8.1 and Server 2012 users, click the Details tab. - In the list of running programs, locate a malware/grayware/spyware file detected earlier.
- Select the detected files, then press either the End Task or the End Process button, depending on the version of Windows you are using.
- Do the same for the remaining detected malware/grayware/spyware files in the list of running programs.
- To check if the malware/grayware/spyware process has been terminated, close Task Manager, and then open it again.
- Close Task Manager.
Step 4
Search and delete this file
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There may be some files that are hidden. Please make sure you check the
Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
- %User Temp%\{random}\{random}.0.cs
- %User Temp%\{random}\{random}.dll
- %User Temp%\{random}\{random}.cmdline
- %User Temp%\{random}\{random}.out
- %User Temp%\{random}\{random}.err
- %User Temp%\mn.exe
- %User Temp%\kk4.log
- %User Temp%\{random numbers}.bat
- %User Temp%\aio.EXE
To manually delete a malware/grayware file from an affected system:
• For Windows 2000, Windows XP, and Windows Server 2003:
- Right-click Start then click Search....
- In the File name* input box, type the following:
- %User Temp%\{random}\{random}.0.cs
- %User Temp%\{random}\{random}.dll
- %User Temp%\{random}\{random}.cmdline
- %User Temp%\{random}\{random}.out
- %User Temp%\{random}\{random}.err
- %User Temp%\mn.exe
- %User Temp%\kk4.log
- %User Temp%\{random numbers}.bat
- %User Temp%\aio.EXE
- In the Look In drop-down list, select My Computer then press Enter.
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).
• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
- In the Search Computer/This PC input box, type:
- %User Temp%\{random}\{random}.0.cs
- %User Temp%\{random}\{random}.dll
- %User Temp%\{random}\{random}.cmdline
- %User Temp%\{random}\{random}.out
- %User Temp%\{random}\{random}.err
- %User Temp%\mn.exe
- %User Temp%\kk4.log
- %User Temp%\{random numbers}.bat
- %User Temp%\aio.EXE
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 5
Scan your computer with your Trend Micro product to delete files detected as Trojan.PS1.LUDICROUZ.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:
