Analysis

  • max time kernel
    93s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2024, 15:29

General

  • Target
    Catalyst.exe
  • Size 14.0MB
  • Sample240529-sw1cpsbc48
  • SHA256 b5e63f3bbfc75de4da25277b7a9fa0b650e8e2bc72c2af0087bd09698a9d098d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 21 IoCs
  • Themida packer 5 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Catalyst.exe
    "C:\Users\Admin\AppData\Local\Temp\Catalyst.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:5000
    • C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\Catalyst_InDev0.1.exe
      "C:\Users\Admin\AppData\Local\Temp\Catalyst.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4536
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c
        3⤵
          PID:4332
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c cls
          3⤵
            PID:2796
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c cls
            3⤵
              PID:3736

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              _lzma.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_lzma.pyd
              • Size 154KB
              • SHA256 613de58e4a9a80eff8f8bc45c350a6eaebf89f85ffd2d7e3b0b266bf0888a60a
              • MD5 SHA1 SHA512 SSDEEP

              _socket.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_socket.pyd
              • Size 76KB
              • SHA256 39715ef8d043354f0ab15f62878530a38518fb6192bc48da6a098498e8d35769
              • MD5 SHA1 SHA512 SSDEEP

              cacert.pem

              • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\certifi\cacert.pem
              • Size 285KB
              • SHA256 7a347ca8fef6e29f82b6e4785355a6635c17fa755e0940f65f15aa8fc7bd7f92
              • MD5 SHA1 SHA512 SSDEEP

              _psutil_windows.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\psutil\_psutil_windows.pyd
              • Size 65KB
              • SHA256 e10b73d6e13a5ae2624630f3d8535c5091ef403db6a00a2798f30874938ee996
              • MD5 SHA1 SHA512 SSDEEP

              unicodedata.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\unicodedata.pyd
              • Size 1.1MB
              • SHA256 ecf7836aa0d36b5880eb6f799ec402b1f2e999f78bfff6fb9a942d1d8d0b9baa
              • MD5 SHA1 SHA512 SSDEEP

              Catalyst_InDev0.1.exe

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\Catalyst_InDev0.1.exe
              • Size 18.9MB
              • SHA256 d4a362825a355126eafd5fba2795722948bb6215456415d9ae9ef05f09c2cb6c
              • MD5 SHA1 SHA512 SSDEEP

              VCRUNTIME140.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\VCRUNTIME140.dll
              • Size 96KB
              • SHA256 d66c3b47091ceb3f8d3cc165a43d285ae919211a0c0fcb74491ee574d8d464f8
              • MD5 SHA1 SHA512 SSDEEP

              _bz2.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\_bz2.pyd
              • Size 81KB
              • SHA256 5843872d5e2b08f138a71fe9ba94813afee59c8b48166d4a8eb0f606107a7e80
              • MD5 SHA1 SHA512 SSDEEP

              _ctypes.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\_ctypes.pyd
              • Size 120KB
              • SHA256 e662d2b35bb48c5f3432bde79c0d20313238af800968ba0faa6ea7e7e5ef4535
              • MD5 SHA1 SHA512 SSDEEP

              _hashlib.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\_hashlib.pyd
              • Size 62KB
              • SHA256 39bc615842a176db72d4e0558f3cdcae23ab0623ad132f815d21dcfbfd4b110e
              • MD5 SHA1 SHA512 SSDEEP

              _queue.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\_queue.pyd
              • Size 30KB
              • SHA256 2f71046891ba279b00b70eb031fe90b379dbe84559cf49ce5d1297ea6bf47a78
              • MD5 SHA1 SHA512 SSDEEP

              _ssl.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\_ssl.pyd
              • Size 155KB
              • SHA256 cb42e8598e3fa53eeebf63f2af1730b9ec64614bda276ab2cd1f1c196b3d7e32
              • MD5 SHA1 SHA512 SSDEEP

              md.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\charset_normalizer\md.pyd
              • Size 10KB
              • SHA256 790a11aa270523c2efa6021ce4f994c3c5a67e8eaaaf02074d5308420b68bd94
              • MD5 SHA1 SHA512 SSDEEP

              md__mypyc.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\charset_normalizer\md__mypyc.pyd
              • Size 116KB
              • SHA256 3d9893aa79efd13d81fcd614e9ef5fb6aad90569beeded5112de5ed5ac3cf753
              • MD5 SHA1 SHA512 SSDEEP

              libcrypto-1_1.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\libcrypto-1_1.dll
              • Size 3.3MB
              • SHA256 976ce72efd0a8aeeb6e21ad441aa9138434314ea07f777432205947cdb149541
              • MD5 SHA1 SHA512 SSDEEP

              libffi-8.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\libffi-8.dll
              • Size 34KB
              • SHA256 128a583e821e52b595eb4b3dda17697d3ca456ee72945f7ecce48ededad0e93c
              • MD5 SHA1 SHA512 SSDEEP

              libssl-1_1.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\libssl-1_1.dll
              • Size 686KB
              • SHA256 2aebb73530d21a2273692a5a3d57235b770daf1c35f60c74e01754a5dac05071
              • MD5 SHA1 SHA512 SSDEEP

              python3.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\python3.dll
              • Size 64KB
              • SHA256 4055d1b9e553b78c244143ab6b48151604003b39a9bf54879dee9175455c1281
              • MD5 SHA1 SHA512 SSDEEP

              python311.dll

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\python311.dll
              • Size 5.5MB
              • SHA256 a0cf640e756875c25c12b4a38ba5f2772e8e512036e2ac59eb8567bf05ffbfb7
              • MD5 SHA1 SHA512 SSDEEP

              select.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\select.pyd
              • Size 28KB
              • SHA256 0046eb32f873cde62cf29af02687b1dd43154e9fd10e0aa3d8353d3debb38790
              • MD5 SHA1 SHA512 SSDEEP

              backend_c.pyd

              • Path C:\Users\Admin\AppData\Local\Temp\onefile_5000_133614702064815169\zstandard\backend_c.pyd
              • Size 512KB
              • SHA256 b990efbda8a50c49cd7fde5894f3c8f3715cb850f8cc4c10bc03fd92e310260f
              • MD5 SHA1 SHA512 SSDEEP

              memory/4536-75-0x00007FF75D330000-0x00007FF75E662000-memory.dmp

              memory/4536-79-0x00007FF75D330000-0x00007FF75E662000-memory.dmp

              memory/4536-78-0x00007FF75D330000-0x00007FF75E662000-memory.dmp

              memory/5000-0-0x00007FFFBDB90000-0x00007FFFBDB92000-memory.dmp

              memory/5000-74-0x00007FF7331A0000-0x00007FF73456F000-memory.dmp

              memory/5000-1-0x00007FF7331A0000-0x00007FF73456F000-memory.dmp

              memory/5000-2-0x00007FF7331A0000-0x00007FF73456F000-memory.dmp

              memory/5000-3-0x00007FF7331A0000-0x00007FF73456F000-memory.dmp

              memory/5000-86-0x00007FF7331A0000-0x00007FF73456F000-memory.dmp