Analysis

  • max time kernel
    172s
  • max time network
    176s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/11/2022, 14:33

General

  • Target
    669a8a3ed205d316851d7d65587d062ad6a534df0959c8ad1675d0933ebf72a1.exe
  • Size 306KB
  • Sample221121-rxbkasdf89
  • SHA256 669a8a3ed205d316851d7d65587d062ad6a534df0959c8ad1675d0933ebf72a1
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Modifies firewall policy service 2 TTPs 10 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 18 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\669a8a3ed205d316851d7d65587d062ad6a534df0959c8ad1675d0933ebf72a1.exe
    "C:\Users\Admin\AppData\Local\Temp\669a8a3ed205d316851d7d65587d062ad6a534df0959c8ad1675d0933ebf72a1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\kGuyq.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1320
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "WinUpdt" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe" /f
        3⤵
        • Adds Run key to start application
        PID:4332
    • C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
      "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:700
      • C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3952
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2864
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
            5⤵
            • Modifies firewall policy service
            • Modifies registry key
            PID:4920
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4932
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
            5⤵
            • Modifies firewall policy service
            • Modifies registry key
            PID:3820
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2496
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe:*:Enabled:Windows Messanger" /f
            5⤵
            • Modifies firewall policy service
            • Modifies registry key
            PID:3440
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\Windows Updater.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Windows Updater.exe:*:Enabled:Windows Messanger" /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3688
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\Windows Updater.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Windows Updater.exe:*:Enabled:Windows Messanger" /f
            5⤵
            • Modifies firewall policy service
            • Modifies registry key
            PID:3140
      • C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        "C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:5096

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        kGuyq.bat

        • Path C:\Users\Admin\AppData\Local\Temp\kGuyq.bat
        • Size 152B
        • SHA256 734c4f48449a118dbdfbbe4971ecf112b26b2b45d1889678c01dea98eb5767d8
        • MD5 SHA1 SHA512

        winupdt2.exe

        • Path C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        • Size 306KB
        • SHA256 3f07e960ceee8ee1078e0ed66bdb052c5d19f84761801739f3396eb2515e0e19
        • MD5 SHA1 SHA512 SSDEEP

        winupdt2.exe

        • Path C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        • Size 306KB
        • SHA256 3f07e960ceee8ee1078e0ed66bdb052c5d19f84761801739f3396eb2515e0e19
        • MD5 SHA1 SHA512 SSDEEP

        winupdt2.exe

        • Path C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        • Size 306KB
        • SHA256 3f07e960ceee8ee1078e0ed66bdb052c5d19f84761801739f3396eb2515e0e19
        • MD5 SHA1 SHA512 SSDEEP

        winupdt2.exe

        • Path C:\Users\Admin\AppData\Roaming\Window Updates\winupdt2.exe
        • Size 306KB
        • SHA256 3f07e960ceee8ee1078e0ed66bdb052c5d19f84761801739f3396eb2515e0e19
        • MD5 SHA1 SHA512 SSDEEP

        memory/700-159-0x0000000000400000-0x00000000005C9000-memory.dmp

        memory/700-148-0x0000000000400000-0x00000000005C9000-memory.dmp

        memory/2220-134-0x0000000000400000-0x00000000005C9000-memory.dmp

        memory/2220-141-0x0000000000400000-0x00000000005C9000-memory.dmp

        memory/3952-151-0x0000000000400000-0x000000000045C000-memory.dmp

        memory/3952-150-0x0000000000400000-0x000000000045C000-memory.dmp

        memory/3952-173-0x0000000000400000-0x000000000045C000-memory.dmp

        memory/3952-145-0x0000000000400000-0x000000000045C000-memory.dmp

        memory/3952-172-0x0000000000400000-0x000000000045C000-memory.dmp

        memory/5096-161-0x0000000000400000-0x0000000000409000-memory.dmp

        memory/5096-157-0x0000000000400000-0x0000000000409000-memory.dmp

        memory/5096-152-0x0000000000400000-0x0000000000409000-memory.dmp

        memory/5096-171-0x0000000000400000-0x0000000000409000-memory.dmp