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Analysis

  • max time kernel
    133s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 17:56

General

  • Target

    2024-05-26_febf82873a06c712ac620dbfb3e639b0_cryptolocker.exe

  • Size

    53KB

  • MD5

    febf82873a06c712ac620dbfb3e639b0

  • SHA1

    c9ee5e1fef782e9631b31468c657e2ea5bec9978

  • SHA256

    72cd06ac2c34d1d1b94389ae93a68e7055c5a205c6f7c46c2e3f5c77bfa52294

  • SHA512

    f2d3b41f8260c27c7755fe9f5e17db775876ff9fa3c31336087c0c3f2660fa5df7e655721590bfb7355a4e4867c6933c76f13a6c63a637ab84115d256554f81b

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPhqlcnvhx5/xFRkHU:6j+1NMOtEvwDpjr8hhXi0

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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-26_febf82873a06c712ac620dbfb3e639b0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_febf82873a06c712ac620dbfb3e639b0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1788
    • 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:1412
  • 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 --field-trial-handle=4444,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=3452 /prefetch:8
    1⤵
      PID:4000

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      54KB

      MD5

      bcd29465a10f6f6516d418f5d57a6084

      SHA1

      974c4109b31b959dfcf9ad8adfb897562e6fe91d

      SHA256

      598569105fa859a01fc0340b6338c60f15cd281166ffec648dad7f4b7e921d30

      SHA512

      0bc2009924b092b17e5a676c11430d18369b0cc81fc9142e871b6b1acb8897fbe32cbe68753cf04f66ea8edcf7507c6f7bc35cfd05be11475184eb8aaf30a7c5

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1412-17-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1412-48-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1788-0-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB

    • memory/1788-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1788-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/1788-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1788-18-0x0000000000500000-0x000000000050F000-memory.dmp

      Filesize

      60KB