Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2024 17:31

General

  • Target

    dc35c41440704458ed7a60c0ac026f62.exe

  • Size

    408KB

  • MD5

    dc35c41440704458ed7a60c0ac026f62

  • SHA1

    28459a2a602943fb5f44cb7424061c390fefb502

  • SHA256

    4d4e7a37101a9fa0810a3ff324a87c302a1328dcaeae6a9c637752e871a1a678

  • SHA512

    f522adf75f7915caf3a87551f4704303ddde487da920c6a2a762d4fc821f5c6749b2496cdd5b5193252eb97f01cdcc3dc77584be90e6833e32f2410b955f8081

  • SSDEEP

    6144:v7l/Mts0sXrneChRWcSUEC8ctAom2C+do4ON1ZA0bYQpBuLGlY+6iPHS/ei:hMSeChscpEBctA2Q11aPQ3/6/ei

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 5 IoCs
  • NirSoft WebBrowserPassView 4 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 6 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 12 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 62 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
    "C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
      "C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
      2⤵
      • Checks computer location settings
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4908
      • C:\Users\Admin\AppData\Local\Temp\YSDXT.exe
        "C:\Users\Admin\AppData\Local\Temp\YSDXT.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2376
        • C:\Users\Admin\AppData\Local\Temp\YSDXT.exe
          "C:\Users\Admin\AppData\Local\Temp\YSDXT.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:5000
          • C:\Users\Admin\AppData\Local\Temp\YSDXT.exe
            "C:\Users\Admin\AppData\Local\Temp\YSDXT.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
            5⤵
            • Executes dropped EXE
            PID:2492
    • C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe
      "C:\Users\Admin\AppData\Local\Temp\dc35c41440704458ed7a60c0ac026f62.exe"
      2⤵
      • Checks computer location settings
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3628
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PJOKL.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3600
        • C:\Windows\SysWOW64\reg.exe
          REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "invidiadriver" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe" /f
          4⤵
          • Adds Run key to start application
          PID:692
      • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
        "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3028
        • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
          "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetWindowsHookEx
          PID:1124
        • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
          "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4928
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4140 --field-trial-handle=2320,i,3025503729105798828,9325691672526736153,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2068

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\PJOKL.txt

      Filesize

      152B

      MD5

      5f88391307396bd801e5d983e4f96ac4

      SHA1

      d426f3dad0cd9f13287b263028ad4587f2b1d9c8

      SHA256

      2d6e24c71a3081416896765d09901744dbd541553af2d831f2a17f6f38ac4dec

      SHA512

      0cc65532264fe5541dc75016c080004c111fecfb97f2f0063984a89089d49ea07a1bf6c1fa9b835ad32cfa986bac82d171351c6cf2163598199588aefdb402f8

    • C:\Users\Admin\AppData\Local\Temp\YSDXT.exe

      Filesize

      320KB

      MD5

      ccc2260269cb43ddadda9444e3d112f7

      SHA1

      ddab46acc12d7c60a15fa363f88030f1dd539fcb

      SHA256

      8ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911

      SHA512

      787d0b4f5d89b840a4917c78e46f963c8c96a96ec005b45d085222ef307c2a76f074c4a65ca033b038e1b7d1419c7cd3c5c5f3075c3ea24e546c68bdd7643fde

    • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe

      Filesize

      384KB

      MD5

      e04328476002044819c479a0ee2ef749

      SHA1

      64dfbf9567263dcdfd9dc574c68342c62f45496d

      SHA256

      5f05a564056106c00550bee58c1c1cb3d2d20fbacb0bcad8bc9b998f469bde51

      SHA512

      71fcf7f17e4f7c23d1a795029d47ce6f9753377220919c4d9858f2738de81c15e3437a22a2b9a853914ce0a188876ee16df71816dd16fb7f36cc9cdfa8fdd652

    • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe

      Filesize

      408KB

      MD5

      a08780334a46a528eb1c69bdda2485db

      SHA1

      cb23220f3940528cf494f46d37d6f1ef9536f5f4

      SHA256

      46bb64b5812ac8723cb15e2d9a63f326c99f04fca18eabda7a4fa465e41523b2

      SHA512

      cdd0fb89c515d22ac6ff04a2607703d408e718ebe88a4c58611b5665feac86e2368d5a3d2fd9faa179db6a37aeeeb7f0a861431eaf07f0f6f1a54a51aa51d7b3

    • memory/1124-87-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/1304-2-0x0000000002320000-0x0000000002321000-memory.dmp

      Filesize

      4KB

    • memory/1304-4-0x0000000002C80000-0x0000000002C81000-memory.dmp

      Filesize

      4KB

    • memory/1304-3-0x0000000002370000-0x0000000002371000-memory.dmp

      Filesize

      4KB

    • memory/2492-49-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2492-53-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2492-44-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/2492-50-0x0000000000400000-0x0000000000454000-memory.dmp

      Filesize

      336KB

    • memory/3028-69-0x0000000002A40000-0x0000000002A41000-memory.dmp

      Filesize

      4KB

    • memory/3628-7-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/3628-77-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/3628-13-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/3628-82-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/3628-10-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/4908-12-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/4908-70-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/4908-9-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/4908-5-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/4908-95-0x0000000000400000-0x0000000000459000-memory.dmp

      Filesize

      356KB

    • memory/4928-97-0x0000000000400000-0x000000000040B000-memory.dmp

      Filesize

      44KB

    • memory/5000-45-0x0000000000400000-0x0000000000441000-memory.dmp

      Filesize

      260KB

    • memory/5000-43-0x0000000000400000-0x0000000000441000-memory.dmp

      Filesize

      260KB

    • memory/5000-41-0x0000000000400000-0x0000000000441000-memory.dmp

      Filesize

      260KB

    • memory/5000-42-0x0000000000400000-0x0000000000441000-memory.dmp

      Filesize

      260KB

    • memory/5000-39-0x0000000000400000-0x0000000000441000-memory.dmp

      Filesize

      260KB