Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2023 09:23

General

  • Target

    30bbc309dddebd1a5640668ecb389849.exe

  • Size

    700KB

  • MD5

    30bbc309dddebd1a5640668ecb389849

  • SHA1

    73024487befa71389c4644c1c468dc0bdc4d6d30

  • SHA256

    a5eb4c027297ecaf9bf022f9c77b743fbe5515d8802c285e5bf1d3c163cd53f2

  • SHA512

    8c7d2ff517127db305e0fcb4366ae11439212c7363c6a6089efa17d2d1b8d48dd98a77393b6e26a05db2e91f6fbed1d736d2326b8286508efa887c7548a6c60b

  • SSDEEP

    12288:i0AoEJrM2OEX+67rqc8oXNhMt/YmdXtyiWxJV1qf0uEAkF1pfxjG3uQNI1S:MxJMgze0ukPJC/CS

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 2 IoCs
  • Modifies firewall policy service 2 TTPs 10 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Modifies Installed Components in the registry 2 TTPs 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 8 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe
    "C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2504
    • C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe
      "C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe"
      2⤵
      • Checks computer location settings
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3044
      • C:\Users\Admin\AppData\Local\Temp\Server-mine.exe
        "C:\Users\Admin\AppData\Local\Temp\Server-mine.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:3520
      • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
        "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1424
        • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
          "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
          4⤵
          • Executes dropped EXE
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of SetThreadContext
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:5096
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\desktop.bat" "
        3⤵
          PID:2460
    • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
      "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
      1⤵
      • Adds policy Run key to start application
      • Modifies Installed Components in the registry
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2656
      • 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\WinUpdates.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\WinUpdates.exe:*:Enabled:Windows Messanger" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4548
      • 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
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1036
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe:*:Enabled:Windows Messanger" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2512
      • 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
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4632
    • C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\WinUpdates.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\WinUpdates.exe:*:Enabled:Windows Messanger" /f
      1⤵
      • Modifies firewall policy service
      • Modifies registry key
      PID:1316
    • C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      1⤵
      • Modifies firewall policy service
      • Modifies registry key
      PID:2832
    • C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe:*:Enabled:Windows Messanger" /f
      1⤵
      • Modifies firewall policy service
      • Modifies registry key
      PID:1576
    • C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      1⤵
      • Modifies firewall policy service
      • Modifies registry key
      PID:4844

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe

      Filesize

      92KB

      MD5

      c3676f1d49e8b75e17c61bd46a9f4a98

      SHA1

      a8ad67d7a65d973ebc7a614b2d336ecb72751453

      SHA256

      f0e9920ed07177a9923f1fc904cf8585dbe1c79b7ba3015d554365b0ae694b67

      SHA512

      54890829efedcb39e566a0a5125cdda4b51d9ea94018efca8696b906e4e78df572b339841804b80ad30c848e7817fb07fffe0de95fd14a09aa0cd6af124ebd1a

    • C:\Users\Admin\AppData\Local\Temp\Server-mine.exe

      Filesize

      76KB

      MD5

      f9f2d37a8253d0f4a59cab3287ccb543

      SHA1

      4b42c0c1205f3a3403afbdd21ce95f14e18d8ced

      SHA256

      af9c1ce49667e314c89a947b35555173a2eb72b3293670217665e2b940bb65ea

      SHA512

      a4c12f4d1099c8f4fafacde4a3c8de8136be948a1547decc25b17d4d8de24be4693f6db60fd41ffe1f24cf21779bb7ec7f2d6c2b13c2acd52b8dace09427c569

    • memory/1424-38-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2504-0-0x0000000000400000-0x00000000004AF000-memory.dmp

      Filesize

      700KB

    • memory/2656-63-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-61-0x0000000075820000-0x000000007589A000-memory.dmp

      Filesize

      488KB

    • memory/2656-90-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-72-0x0000000075820000-0x000000007589A000-memory.dmp

      Filesize

      488KB

    • memory/2656-52-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-51-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-48-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-71-0x0000000075FE0000-0x00000000760D0000-memory.dmp

      Filesize

      960KB

    • memory/2656-70-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-67-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/2656-62-0x0000000077306000-0x0000000077307000-memory.dmp

      Filesize

      4KB

    • memory/2656-60-0x0000000075FE0000-0x00000000760D0000-memory.dmp

      Filesize

      960KB

    • memory/2656-66-0x0000000000400000-0x0000000000473000-memory.dmp

      Filesize

      460KB

    • memory/3044-9-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/3044-37-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/3044-5-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/3044-3-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/5096-56-0x0000000000400000-0x0000000000434000-memory.dmp

      Filesize

      208KB

    • memory/5096-42-0x0000000000400000-0x0000000000434000-memory.dmp

      Filesize

      208KB

    • memory/5096-45-0x0000000000400000-0x0000000000434000-memory.dmp

      Filesize

      208KB