JAVA_ADWIND.HZL

May 29, 2018
 Analysis by: Hazel Ann Poligratis
 ALIASES:

Trojan:Java/Jrat.F (Microsoft), Java/Adwind.AAU (ESET-NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

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:

560,267 bytes

File Type:

JAR

Memory Resident:

Yes

Initial Samples Received Date:

06 Mar 2018

Payload:

Drops 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 files:

  • %User Temp%\hsperfdata_{computer name}\{process ID}
  • %Application Data%\Oracle\{Copies of files under Java installation folder}
  • %User Profile%\bvVnJXUxDkt\ID.txt
  • %User Profile%\fUTkALeaTxM\ID.txt
  • %System%\test.txt
  • %User Temp%\_0.{random numbers}.class
  • %User Profile%\.oracle_jre_usage\{random filename}.timestamp

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %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 and 7.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It drops and executes the following files:

  • %User Temp%\Retrive{random numbers}.vbs
  • %User Temp%\{Random string}.reg

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders:

  • %User Profile%\bvVnJXUxDkt
  • %User Profile%\fUTkALeaTxM
  • %Application Data%\Oracle
  • %User Temp%\hsperfdata_{computer name}

(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 and 7.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
ZflezdoejVf = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\bvVnJXUxDkt\suMzvbAwWtM.vrqiBR"

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Attachments
SaveZoneInformation = 1

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations
LowRiskFileTypes = .avi;.bat;.com;.cmd;.exe;.htm;.html;.lnk;.mpg;.mpeg;.mov;.mp3;.msi;.m3u;.rar;.reg;.txt;.vbs;.wav;.zip;.jar;

HKEY_CURRENT_USER\Environment
SEE_MASK_NOZONECHECKS = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
ConsentPromptBehaviorAdmin = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
ConsentPromptBehaviorUser = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System
EnableLUA = 0

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
System value
PromptOnSecureDesktop = 0

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = 2

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows NT\SystemRestore
DisableConfig = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows NT\SystemRestore
DisableSR = 1

Other Details

This Trojan does the following:

  • It disables executing the following applications by adding the following registry entries:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{application}
      • debugger = "svchost.exe"

    Where {application} can be any of the following:
    • acs.exe
    • AdAwareDesktop.exe
    • AdAwareService.exe
    • AdAwareTray.exe
    • AgentSvc.exe
    • av_task.exe
    • AVK.exe
    • AVKProxy.exe
    • AVKService.exe
    • AVKTray.exe
    • AVKWCtlx64.exe
    • avpmapp.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
    • op_mon.exe
    • OPSSVC.EXE
    • ProcessHacker.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
    • Taskmgr.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
    • UserAccountControlSettings.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:

14.280.05

FIRST VSAPI PATTERN DATE:

28 May 2018

VSAPI OPR PATTERN File:

14.281.00

VSAPI OPR PATTERN Date:

29 May 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
    • ZflezdoejVf = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\bvVnJXUxDkt\suMzvbAwWtM.vrqiBR"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments
    • SaveZoneInformation = 1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
    • LowRiskFileTypes = .avi;.bat;.com;.cmd;.exe;.htm;.html;.lnk;.mpg;.mpeg;.mov;.mp3;.msi;.m3u;.rar;.reg;.txt;.vbs;.wav;.zip;.jar;
  • In HKEY_CURRENT_USER\Environment
    • SEE_MASK_NOZONECHECKS = 1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    • ConsentPromptBehaviorUser = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    • EnableLUA = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System value
    • PromptOnSecureDesktop = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{application}
    • debugger = "svchost.exe"

Step 5

Restore this modified registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator’s help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
    • From: ConsentPromptBehaviorAdmin = 0
      To: ConsentPromptBehaviorAdmin = 5
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    • From: DisableTaskMgr = 2
      To: DisableTaskMgr = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore
    • From: DisableConfig = 1
      To: DisableConfig = 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore
    • From: DisableSR = 1
      To: DisableSR = 0

Step 6

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden folders in the search result.
  • %User Profile%\bvVnJXUxDkt
  • %User Profile%\fUTkALeaTxM
  • %Application Data%\Oracle
  • %User Temp%\hsperfdata_{computer name}

Step 7

Search and delete these files

[ 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.
  • %System%\test.txt
  • %User Temp%\_0.{random numbers}.class
  • %User Profile%\.oracle_jre_usage\{random filename}.timestamp
  • %User Temp%\Retrive{random numbers}.vbs
  • %User Temp%\{Random string}.reg

Step 8

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