Trojan.Win64.KILLAV.AB
HEUR:Trojan.Win64.Miner.vho (Kaspersky)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet
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.
It deletes registry keys related to antivirus programs. Doing this allows this malware to execute its routines without being detected by installed antivirus programs.
It disables antivirus services. This is done to allow this malware to perform its routines, avoiding removal from the system.
It deletes itself after execution.
TECHNICAL DETAILS
31,232 bytes
EXE
Yes
24 Jul 2020
Terminates processes
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 copies of itself into the affected system:
- %System%\__{Random Numbers}_{Random Numbers}.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Other System Modifications
This Trojan deletes the following registry keys related to antivirus and security applications:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{Service Name}
Where {Service Name} can be:
- KAVFS
- ksnproxy
- KAVFSGT
- kavfsslp
- klnagent
- SAVService
- KAVFS
- kavfsslp
- klnagent
- KAVFSGT
- epag
- EPIntegrationService
- EPProtectedService
- EPRedline
- EPSecurityService
- EPUpdateService
Process Termination
This Trojan terminates the following processes if found running in the affected system's memory:
- Using the following commands:
- taskkill /f /im {Process Name}
Process Name:- macompatsvc.exe
- mfemactl.exe
- shstat.exe
- mcconsol.exe
- macmnsvc.exe
- masvc.exe
- mcshield.exe
- mfemms.exe
- AgentSvc.exe
- PccNt.exe
- PccNTMon.exe
- NTRTScan.exe
- kavtray.exe
- kavfswp.exe
- kavfswh.exe
- kavfs.exe
- ksnproxy.exe
- kavfsgt.exe
- klnagent.exe
It disables antivirus services by terminating the following services if found on the affected system:
- KAVFS
- ksnproxy
- KAVFSGT
- kavfsslp
- klnagent
- SAVService
- KAVFS
- kavfsslp
- klnagent
- KAVFSGT
- epag
- EPIntegrationService
- EPProtectedService
- EPRedline
- EPSecurityService
- EPUpdateService
Other Details
This Trojan does the following:
- It adds the following Image File Execution Options to prevent certain files from executing:
Registry Entry:- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
- Debugger = "%System%\svchost.exe"
- Debugger = "%System%\svchost.exe"
Where {Application Name} is:- 360bdoctor.exe
- 360EntClient.exe
- 360rp.exe
- 360Safe.exe
- 360sd.exe
- 360tray.exe
- AgentSvc.exe
- ARWSRVC.EXE
- ASDSvc.exe
- aswEngSrv.exe
- aswidsagent.exe
- AvastSvc.exe
- AvastUI.exe
- avgsvca.exe
- avgui.exe
- avguix.exe
- avgwdsvca.exe
- avp.exe
- avpmapp.exe
- avpsus.exe
- avpui.exe
- bdredline.exe
- ccSvcHst.exe
- coreFrameworkHost.exe
- coreServiceShell.exe
- cyserver.exe
- CyveraService.exe
- ds_monitor.exe
- dsa.exe
- EconSer.exe
- egui.exe
- eguiProxy.exe
- ekrn.exe
- EMLPROXY.EXE
- epag.exe
- EPIntegrationService.exe
- EPProtectedService.exe
- EPSecurityService.exe
- EPUpdateService.exe
- ERAAgent.exe
- hmpalert.exe
- iVPAgent.exe
- K7CrvSvc.exe
- k7emlpxy.exe
- k7fwsrvc.exe
- k7rtscan.exe
- k7tsecurity.exe
- k7tsmngr.exe
- k7twp.exe
- kavfs.exe
- kavfsgt.exe
- kavfswh.exe
- kavfswp.exe
- kavtray.exe
- klnagent.exe
- klserver.exe
- ksnproxy.exe
- kwmusic.exe
- macmnsvc.exe
- macompatsvc.exe
- masvc.exe
- MBAMService.exe
- mcconsol.exe
- mcshield.exe
- mfemactl.exe
- mfemms.exe
- MpCmdRun.exe
- MsMpEng.exe
- msseces.exe
- NortonSecurity.exe
- Notifier.exe
- nsWscSvc.exe
- NTRTScan.exe
- onlinent.exe
- opssvc.exe
- PccNt.exe
- PccNTMon.exe
- PSANHost.exe
- PSUAMain.exe
- PSUAService.exe
- QQPCRealTimeSpeedup.exe
- QQPCRTP.exe
- QQPCTray.exe
- quhlpsvc.exe
- qvod.exe
- RAYCSER.EXE
- RouterNT.exe
- SAPISSVC.EXE
- SavService.exe
- SEDService.exe
- sepWscSvc64.exe
- shstat.exe
- Sophos UI.exe
- SophosFileScanner.exe
- SophosFIMService.exe
- SophosFS.exe
- SophosNtpService.exe
- SSPService.exe
- SVRTgui.exe
- SVRTservice.exe
- tlaservice.exe
- TMBMSRV.exe
- TmCCSF.exe
- TmListen.exe
- TmPfw.exe
- vapm.exe
- winword.exe
- ZhuDongFangYu.exe
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It deletes itself after execution.
SOLUTION
9.850
16.122.08
24 Jul 2020
16.123.00
25 Jul 2020
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
-
TROJ.Win32.TRX.XXPE50FFF036E0002 (GENERIC: Hit Bad Auto Shield)
Step 2
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 3
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 4
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.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
- Debugger = "%System%\svchost.exe"
- Debugger = "%System%\svchost.exe"
Where {Application Name} is:
- 360bdoctor.exe
- 360EntClient.exe
- 360rp.exe
- 360Safe.exe
- 360sd.exe
- 360tray.exe
- AgentSvc.exe
- ARWSRVC.EXE
- ASDSvc.exe
- aswEngSrv.exe
- aswidsagent.exe
- AvastSvc.exe
- AvastUI.exe
- avgsvca.exe
- avgui.exe
- avguix.exe
- avgwdsvca.exe
- avp.exe
- avpmapp.exe
- avpsus.exe
- avpui.exe
- bdredline.exe
- ccSvcHst.exe
- coreFrameworkHost.exe
- coreServiceShell.exe
- cyserver.exe
- CyveraService.exe
- ds_monitor.exe
- dsa.exe
- EconSer.exe
- egui.exe
- eguiProxy.exe
- ekrn.exe
- EMLPROXY.EXE
- epag.exe
- EPIntegrationService.exe
- EPProtectedService.exe
- EPSecurityService.exe
- EPUpdateService.exe
- ERAAgent.exe
- hmpalert.exe
- iVPAgent.exe
- K7CrvSvc.exe
- k7emlpxy.exe
- k7fwsrvc.exe
- k7rtscan.exe
- k7tsecurity.exe
- k7tsmngr.exe
- k7twp.exe
- kavfs.exe
- kavfsgt.exe
- kavfswh.exe
- kavfswp.exe
- kavtray.exe
- klnagent.exe
- klserver.exe
- ksnproxy.exe
- kwmusic.exe
- macmnsvc.exe
- macompatsvc.exe
- masvc.exe
- MBAMService.exe
- mcconsol.exe
- mcshield.exe
- mfemactl.exe
- mfemms.exe
- MpCmdRun.exe
- MsMpEng.exe
- msseces.exe
- NortonSecurity.exe
- Notifier.exe
- nsWscSvc.exe
- NTRTScan.exe
- onlinent.exe
- opssvc.exe
- PccNt.exe
- PccNTMon.exe
- PSANHost.exe
- PSUAMain.exe
- PSUAService.exe
- QQPCRealTimeSpeedup.exe
- QQPCRTP.exe
- QQPCTray.exe
- quhlpsvc.exe
- qvod.exe
- RAYCSER.EXE
- RouterNT.exe
- SAPISSVC.EXE
- SavService.exe
- SEDService.exe
- sepWscSvc64.exe
- shstat.exe
- Sophos UI.exe
- SophosFileScanner.exe
- SophosFIMService.exe
- SophosFS.exe
- SophosNtpService.exe
- SSPService.exe
- SVRTgui.exe
- SVRTservice.exe
- tlaservice.exe
- TMBMSRV.exe
- TmCCSF.exe
- TmListen.exe
- TmPfw.exe
- vapm.exe
- winword.exe
- ZhuDongFangYu.exe
Step 5
Search and delete this file
- %System%\__{Random Numbers}_{Random Numbers}.exe
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.Win64.KILLAV.AB. 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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