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JAVA_QRAT.THIODAH

September 12, 2018
 Analysis by: John Rey Canon
 ALIASES:

HEUR:Backdoor.Java.QRat.gen (Kaspersky); JAVA/Kryptik.fhbwl (Avira)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, 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.

  TECHNICAL DETAILS

File Size:

522,931 bytes

File Type:

JAR

Memory Resident:

Yes

Initial Samples Received Date:

04 Sep 2018

Payload:

Connects to URLs/IPs, Terminates processes, Deletes files

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:

  • %User Profile%\{Random Foldername 2}\{Random Filename}.{Random File Extension}

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.)

It drops the following files:

  • %User Temp%\hsperfdata_{username}\{Process ID} (4 Files)
  • %ProgramData%\Oracle\Java\.oracle_jre_usage\{Random Numbers 1}.timestamp (2 Files)
  • %System%\test.txt
  • %User Profile%\{Random Foldername 1}\ID.txt
  • %User Profile%\{Random Foldername 2}\ID.txt
  • %User Temp%\{Random Filename}.reg

(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.. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.)

It drops and executes the following files:

  • %User Temp%\_0.{Random Numbers}.class (2 Files)
  • %User Temp%\Retrive{Random Numbers}.vbs (8 Files)

(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:

  • icacls.exe %All Users Profile%\Oracle\Java\.oracle_jre_usage\{Random Strings}.timestamp /grant "everyone":(OI)(CI)M
  • cmd.exe /C cscript.exe %User Temp%\Retrive{Random Numbers}.vbs (8 Files)
  • xcopy "%Program Files%\Java\jre1.8.0_111" "%Application Data%\Oracle\" /e
  • reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v {Random Text} /t REG_EXPAND_SZ /d "\"%Application Data%\Oracle\bin\javaw.exe\" -jar \"%User Profile%\{Random Foldername 2}\{Random Filename}.{Random File Extension}\"" /f
  • attrib +h "%User Profile%\{Random Foldername 2}\*.*"
  • attrib +h "%User Profile%\{Random Foldername 2}"

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000, XP, and Server 2003, or C:\ProgramData on Windows Vista, 7, and 8. . %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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Random Name} = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\{Random Foldername 2}\{Random Filename}"

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\hsperfdata_{username}\{Process ID} (1 File)
  • %User Temp%\Retrive{Random Numbers}.vbs (8 Files)

(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.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.189.150

It does the following:

  • It terminates the following processes using the command:
    • taskkill /IM {Process Name} /T /F
      where {Process Name} are as follows:
      • acs.exe
      • AdAwareDesktop.exe
      • AdAwareService.exe
      • AdAwareTray.exe
      • AgentSvc.exe
      • AVK.exe
      • AVKProxy.exe
      • AVKService.exe
      • AVKTray.exe
      • AVKWCtlx64.exe
      • avpmapp.exe
      • av_task.exe
      • Bav.exe
      • bavhm.exe
      • BavSvc.exe
      • BavTray.exe
      • BavUpdater.exe
      • BavWebClient.exe
      • BDSSVC.EXE
      • BgScan.exe
      • BullGuard.exe
      • BullGuardBhvScanner.exe
      • BullGuardUpdate.exe
      • BullGuarScanner.exe
      • capinfos.exe
      • cavwp.exe
      • CertReg.exe
      • cis.exe
      • CisTray.exe
      • clamscan.exe
      • ClamTray.exe
      • ClamWin.exe
      • cmdagent.exe
      • ConfigSecurityPolicy.exe
      • CONSCTLX.EXE
      • coreFrameworkHost.exe
      • coreServiceShell.exe
      • dragon_updater.exe
      • dumpcap.exe
      • econceal.exe
      • econser.exe
      • editcap.exe
      • EMLPROXY.EXE
      • escanmon.exe
      • escanpro.exe
      • fcappdb.exe
      • FCDBlog.exe
      • FCHelper64.exe
      • FilMsg.exe
      • FilUp.exe
      • filwscc.exe
      • fmon.exe
      • FortiClient.exe
      • FortiClient_Diagnostic_Tool.exe
      • FortiESNAC.exe
      • FortiFW.exe
      • FortiProxy.exe
      • FortiSSLVPNdaemon.exe
      • FortiTray.exe
      • FPAVServer.exe
      • FProtTray.exe
      • FPWin.exe
      • freshclam.exe
      • freshclamwrap.exe
      • fsgk32.exe
      • FSHDLL64.exe
      • fshoster32.exe
      • FSM32.EXE
      • FSMA32.EXE
      • fsorsp.exe
      • fssm32.exe
      • GdBgInx64.exe
      • GDKBFltExe32.exe
      • GDSC.exe
      • GDScan.exe
      • guardxkickoff_x64.exe
      • guardxservice.exe
      • iptray.exe
      • K7AVScan.exe
      • K7CrvSvc.exe
      • K7EmlPxy.EXE
      • K7FWSrvc.exe
      • K7PSSrvc.exe
      • K7RTScan.exe
      • K7SysMon.Exe
      • K7TSecurity.exe
      • K7TSMain.exe
      • K7TSMngr.exe
      • LittleHook.exe
      • mbam.exe
      • mbamscheduler.exe
      • mbamservice.exe
      • MCS-Uninstall.exe
      • MCShieldCCC.exe
      • MCShieldDS.exe
      • MCShieldRTM.exe
      • mergecap.exe
      • MpCmdRun.exe
      • MpUXSrv.exe
      • MSASCui.exe
      • MsMpEng.exe
      • MWAGENT.EXE
      • MWASER.EXE
      • nanoav.exe
      • nanosvc.exe
      • nbrowser.exe
      • nfservice.exe
      • NisSrv.exe
      • njeeves2.exe
      • nnf.exe
      • nprosec.exe
      • NS.exe
      • nseupdatesvc.exe
      • nvcod.exe
      • nvcsvc.exe
      • nvoy.exe
      • nwscmon.exe
      • ONLINENT.EXE
      • OPSSVC.EXE
      • op_mon.exe
      • procexp.exe
      • PSANHost.exe
      • PSUAMain.exe
      • PSUAService.exe
      • psview.exe
      • PtSessionAgent.exe
      • PtSvcHost.exe
      • PtWatchDog.exe
      • quamgr.exe
      • QUHLPSVC.EXE
      • rawshark.exe
      • SAPISSVC.EXE
      • SASCore64.exe
      • SASTask.exe
      • SBAMSvc.exe
      • SBAMTray.exe
      • SBPIMSvc.exe
      • SCANNER.EXE
      • SCANWSCS.EXE
      • schmgr.exe
      • scproxysrv.exe
      • ScSecSvc.exe
      • SDFSSvc.exe
      • SDScan.exe
      • SDTray.exe
      • SDWelcome.exe
      • SSUpdate64.exe
      • SUPERAntiSpyware.exe
      • SUPERDelete.exe
      • text2pcap.exe
      • TRAYICOS.EXE
      • TRAYSSER.EXE
      • trigger.exe
      • tshark.exe
      • twsscan.exe
      • twssrv.exe
      • uiSeAgnt.exe
      • uiUpdateTray.exe
      • uiWatchDog.exe
      • uiWinMgr.exe
      • UnThreat.exe
      • UserReg.exe
      • utsvc.exe
      • V3Main.exe
      • V3Medic.exe
      • V3Proxy.exe
      • V3SP.exe
      • V3Svc.exe
      • V3Up.exe
      • VIEWTCP.EXE
      • VIPREUI.exe
      • virusutilities.exe
      • WebCompanion.exe
      • wireshark.exe
      • Zanda.exe
      • Zlh.exe
      • zlhh.exe
  • It disables executing the following applications by adding the following registry entries:
    • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
      • debugger = svchost.exe
      where {Application Name} are as follows:
      • acs.exe
      • AdAwareDesktop.exe
      • AdAwareService.exe
      • AdAwareTray.exe
      • AgentSvc.exe
      • AVK.exe
      • AVKProxy.exe
      • AVKService.exe
      • AVKTray.exe
      • AVKWCtlx64.exe
      • avpmapp.exe
      • av_task.exe
      • Bav.exe
      • bavhm.exe
      • BavSvc.exe
      • BavTray.exe
      • BavUpdater.exe
      • BavWebClient.exe
      • BDSSVC.EXE
      • BgScan.exe
      • BullGuard.exe
      • BullGuardBhvScanner.exe
      • BullGuardUpdate.exe
      • BullGuarScanner.exe
      • capinfos.exe
      • cavwp.exe
      • CertReg.exe
      • cis.exe
      • CisTray.exe
      • clamscan.exe
      • ClamTray.exe
      • ClamWin.exe
      • cmdagent.exe
      • ConfigSecurityPolicy.exe
      • CONSCTLX.EXE
      • coreFrameworkHost.exe
      • coreServiceShell.exe
      • dragon_updater.exe
      • dumpcap.exe
      • econceal.exe
      • econser.exe
      • editcap.exe
      • EMLPROXY.EXE
      • escanmon.exe
      • escanpro.exe
      • fcappdb.exe
      • FCDBlog.exe
      • FCHelper64.exe
      • FilMsg.exe
      • FilUp.exe
      • filwscc.exe
      • fmon.exe
      • FortiClient.exe
      • FortiClient_Diagnostic_Tool.exe
      • FortiESNAC.exe
      • FortiFW.exe
      • FortiProxy.exe
      • FortiSSLVPNdaemon.exe
      • FortiTray.exe
      • FPAVServer.exe
      • FProtTray.exe
      • FPWin.exe
      • freshclam.exe
      • freshclamwrap.exe
      • fsgk32.exe
      • FSHDLL64.exe
      • fshoster32.exe
      • FSM32.EXE
      • FSMA32.EXE
      • fsorsp.exe
      • fssm32.exe
      • GdBgInx64.exe
      • GDKBFltExe32.exe
      • GDSC.exe
      • GDScan.exe
      • guardxkickoff_x64.exe
      • guardxservice.exe
      • iptray.exe
      • K7AVScan.exe
      • K7CrvSvc.exe
      • K7EmlPxy.EXE
      • K7FWSrvc.exe
      • K7PSSrvc.exe
      • K7RTScan.exe
      • K7SysMon.Exe
      • K7TSecurity.exe
      • K7TSMain.exe
      • K7TSMngr.exe
      • LittleHook.exe
      • mbam.exe
      • mbamscheduler.exe
      • mbamservice.exe
      • MCS-Uninstall.exe
      • MCShieldCCC.exe
      • MCShieldDS.exe
      • MCShieldRTM.exe
      • mergecap.exe
      • MpCmdRun.exe
      • MpUXSrv.exe
      • MSASCui.exe
      • MsMpEng.exe
      • MWAGENT.EXE
      • MWASER.EXE
      • nanoav.exe
      • nanosvc.exe
      • nbrowser.exe
      • nfservice.exe
      • NisSrv.exe
      • njeeves2.exe
      • nnf.exe
      • nprosec.exe
      • NS.exe
      • nseupdatesvc.exe
      • nvcod.exe
      • nvcsvc.exe
      • nvoy.exe
      • nwscmon.exe
      • ONLINENT.EXE
      • OPSSVC.EXE
      • op_mon.exe
      • procexp.exe
      • PSANHost.exe
      • PSUAMain.exe
      • PSUAService.exe
      • psview.exe
      • PtSessionAgent.exe
      • PtSvcHost.exe
      • PtWatchDog.exe
      • quamgr.exe
      • QUHLPSVC.EXE
      • rawshark.exe
      • SAPISSVC.EXE
      • SASCore64.exe
      • SASTask.exe
      • SBAMSvc.exe
      • SBAMTray.exe
      • SBPIMSvc.exe
      • SCANNER.EXE
      • SCANWSCS.EXE
      • schmgr.exe
      • scproxysrv.exe
      • ScSecSvc.exe
      • SDFSSvc.exe
      • SDScan.exe
      • SDTray.exe
      • SDWelcome.exe
      • SSUpdate64.exe
      • SUPERAntiSpyware.exe
      • SUPERDelete.exe
      • text2pcap.exe
      • TRAYICOS.EXE
      • TRAYSSER.EXE
      • trigger.exe
      • tshark.exe
      • twsscan.exe
      • twssrv.exe
      • uiSeAgnt.exe
      • uiUpdateTray.exe
      • uiWatchDog.exe
      • uiWinMgr.exe
      • UnThreat.exe
      • UserReg.exe
      • utsvc.exe
      • V3Main.exe
      • V3Medic.exe
      • V3Proxy.exe
      • V3SP.exe
      • V3Svc.exe
      • V3Up.exe
      • VIEWTCP.EXE
      • VIPREUI.exe
      • virusutilities.exe
      • WebCompanion.exe
      • wireshark.exe
      • Zanda.exe
      • Zlh.exe
      • zlhh.exe

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.484.06

FIRST VSAPI PATTERN DATE:

04 Sep 2018

VSAPI OPR PATTERN File:

14.485.00

VSAPI OPR PATTERN Date:

05 Sep 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

[ Learn More ]

Step 4

Delete this registry value

[ Learn More ]

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • {Random Name} = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\{Random Foldername 2}\{Random Filename}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
    • debugger = svchost.exe
    where {Application Name} are as follows:
    • acs.exe
    • AdAwareDesktop.exe
    • AdAwareService.exe
    • AdAwareTray.exe
    • AgentSvc.exe
    • AVK.exe
    • AVKProxy.exe
    • AVKService.exe
    • AVKTray.exe
    • AVKWCtlx64.exe
    • avpmapp.exe
    • av_task.exe
    • Bav.exe
    • bavhm.exe
    • BavSvc.exe
    • BavTray.exe
    • BavUpdater.exe
    • BavWebClient.exe
    • BDSSVC.EXE
    • BgScan.exe
    • BullGuard.exe
    • BullGuardBhvScanner.exe
    • BullGuardUpdate.exe
    • BullGuarScanner.exe
    • capinfos.exe
    • cavwp.exe
    • CertReg.exe
    • cis.exe
    • CisTray.exe
    • clamscan.exe
    • ClamTray.exe
    • ClamWin.exe
    • cmdagent.exe
    • ConfigSecurityPolicy.exe
    • CONSCTLX.EXE
    • coreFrameworkHost.exe
    • coreServiceShell.exe
    • dragon_updater.exe
    • dumpcap.exe
    • econceal.exe
    • econser.exe
    • editcap.exe
    • EMLPROXY.EXE
    • escanmon.exe
    • escanpro.exe
    • fcappdb.exe
    • FCDBlog.exe
    • FCHelper64.exe
    • FilMsg.exe
    • FilUp.exe
    • filwscc.exe
    • fmon.exe
    • FortiClient.exe
    • FortiClient_Diagnostic_Tool.exe
    • FortiESNAC.exe
    • FortiFW.exe
    • FortiProxy.exe
    • FortiSSLVPNdaemon.exe
    • FortiTray.exe
    • FPAVServer.exe
    • FProtTray.exe
    • FPWin.exe
    • freshclam.exe
    • freshclamwrap.exe
    • fsgk32.exe
    • FSHDLL64.exe
    • fshoster32.exe
    • FSM32.EXE
    • FSMA32.EXE
    • fsorsp.exe
    • fssm32.exe
    • GdBgInx64.exe
    • GDKBFltExe32.exe
    • GDSC.exe
    • GDScan.exe
    • guardxkickoff_x64.exe
    • guardxservice.exe
    • iptray.exe
    • K7AVScan.exe
    • K7CrvSvc.exe
    • K7EmlPxy.EXE
    • K7FWSrvc.exe
    • K7PSSrvc.exe
    • K7RTScan.exe
    • K7SysMon.Exe
    • K7TSecurity.exe
    • K7TSMain.exe
    • K7TSMngr.exe
    • LittleHook.exe
    • mbam.exe
    • mbamscheduler.exe
    • mbamservice.exe
    • MCS-Uninstall.exe
    • MCShieldCCC.exe
    • MCShieldDS.exe
    • MCShieldRTM.exe
    • mergecap.exe
    • MpCmdRun.exe
    • MpUXSrv.exe
    • MSASCui.exe
    • MsMpEng.exe
    • MWAGENT.EXE
    • MWASER.EXE
    • nanoav.exe
    • nanosvc.exe
    • nbrowser.exe
    • nfservice.exe
    • NisSrv.exe
    • njeeves2.exe
    • nnf.exe
    • nprosec.exe
    • NS.exe
    • nseupdatesvc.exe
    • nvcod.exe
    • nvcsvc.exe
    • nvoy.exe
    • nwscmon.exe
    • ONLINENT.EXE
    • OPSSVC.EXE
    • op_mon.exe
    • procexp.exe
    • PSANHost.exe
    • PSUAMain.exe
    • PSUAService.exe
    • psview.exe
    • PtSessionAgent.exe
    • PtSvcHost.exe
    • PtWatchDog.exe
    • quamgr.exe
    • QUHLPSVC.EXE
    • rawshark.exe
    • SAPISSVC.EXE
    • SASCore64.exe
    • SASTask.exe
    • SBAMSvc.exe
    • SBAMTray.exe
    • SBPIMSvc.exe
    • SCANNER.EXE
    • SCANWSCS.EXE
    • schmgr.exe
    • scproxysrv.exe
    • ScSecSvc.exe
    • SDFSSvc.exe
    • SDScan.exe
    • SDTray.exe
    • SDWelcome.exe
    • SSUpdate64.exe
    • SUPERAntiSpyware.exe
    • SUPERDelete.exe
    • text2pcap.exe
    • TRAYICOS.EXE
    • TRAYSSER.EXE
    • trigger.exe
    • tshark.exe
    • twsscan.exe
    • twssrv.exe
    • uiSeAgnt.exe
    • uiUpdateTray.exe
    • uiWatchDog.exe
    • uiWinMgr.exe
    • UnThreat.exe
    • UserReg.exe
    • utsvc.exe
    • V3Main.exe
    • V3Medic.exe
    • V3Proxy.exe
    • V3SP.exe
    • V3Svc.exe
    • V3Up.exe
    • VIEWTCP.EXE
    • VIPREUI.exe
    • virusutilities.exe
    • WebCompanion.exe
    • wireshark.exe
    • Zanda.exe
    • Zlh.exe
    • zlhh.exe

Step 5

Search and delete this file

[ Learn More ]
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%\hsperfdata_{username}\{Process ID} (4 Files)
  • %ProgramData%\Oracle\Java\.oracle_jre_usage\{Random Numbers 1}.timestamp (2 Files)
  • %System%\test.txt
  • %User Profile%\{Random Foldername 1}\ID.txt
  • %User Profile%\{Random Foldername 2}\ID.txt
  • %User Temp%\{Random Filename}.reg
  • %User Temp%\_0.{Random Numbers}.class (2 Files)
  • %User Temp%\Retrive{Random Numbers}.vbs (8 Files)

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as JAVA_QRAT.THIODAH. 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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