Analysis

  • max time kernel
    93s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 14:46

General

  • Target

    2024-03-28_a4fa4efd06f86ece36b91707fce41d3b_cryptolocker.exe

  • Size

    55KB

  • MD5

    a4fa4efd06f86ece36b91707fce41d3b

  • SHA1

    0861387070064314bfb035d5ff9d3267240c5ad6

  • SHA256

    fdd5703c85b5dda96c5eb8101b4e895ce0a8a9a20aa592b7812b7076b910da2e

  • SHA512

    7fd5f381fd75f47c020020cb2b98ef6cfc82274212a66f82fc87bf426e8a21984b5528c973bac5d5ca30cbbd223af07ee7e5e02c549a4dd903c38706979483eb

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbP/MM1:xj+VGMOtEvwDpjubXMM1

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-28_a4fa4efd06f86ece36b91707fce41d3b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_a4fa4efd06f86ece36b91707fce41d3b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:648
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:3560

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          55KB

          MD5

          9fea287966b7a224686e32b2f74c89c1

          SHA1

          03ecb50bb3c802a0cbeb315b0e0287221230e3b9

          SHA256

          bc906b22ae35e47deb185dfe8be21ac9d4322be7b24ab1a6248ebeb9aad2810f

          SHA512

          2517080672e5fb7f4ead0a87d284b81e9339a6f4730a5d1e1271fe6a4e231836a167375d3e5fb7d9f61fb7da58bd40e3fea636a4c295a8b07bc64e14e78d401b

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/648-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/648-1-0x0000000002150000-0x0000000002156000-memory.dmp

          Filesize

          24KB

        • memory/648-2-0x0000000002150000-0x0000000002156000-memory.dmp

          Filesize

          24KB

        • memory/648-3-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/648-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3560-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3560-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3560-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3560-49-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB