Analysis

  • max time kernel
    145s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/04/2024, 12:36

General

  • Target

    2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe

  • Size

    51KB

  • MD5

    59a5eb6ef8a2ce3f4da88feab58e563d

  • SHA1

    c09a037d7e785a6e1d7d26d8ec1792bbf48f80ed

  • SHA256

    b378d9cb56f4828ae28ac53603a8541346510e1484dc2f36abef2641f7487678

  • SHA512

    df8afcec514cb6d134593f2ecb7fa766ba7021eaf258ee1cee7d8f648ba631ff99b7504d2e4395b1eb0e5046b1cbdd14a3bd1299985aef80919119367d705cdd

  • SSDEEP

    768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOL:z6QFElP6n+gKmddpMOtEvwDpj31iL

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-18_59a5eb6ef8a2ce3f4da88feab58e563d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1380
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:452
  • 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=1860 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3080

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      51KB

      MD5

      3c8884b0826efa8171d4019908df8390

      SHA1

      d83463e04cc71bd6ac5439e5427f63ed9c5f6f3c

      SHA256

      502fc5d69ee7874692a83b71e4cb4992dc21262e36cba2dfeef68dd2d7c8a9ac

      SHA512

      53ae411c9493dbf0d7daf966252f50df8565c86474cd40d0d754e19dfcdc8bf2062e8080bf933959bdc3a7f6210727237c6800cc064c1b8d58178a70e2202796

    • memory/452-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

      Filesize

      24KB

    • memory/452-24-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/452-26-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1380-0-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB

    • memory/1380-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1380-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

      Filesize

      24KB

    • memory/1380-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

      Filesize

      24KB

    • memory/1380-17-0x0000000000500000-0x0000000000510000-memory.dmp

      Filesize

      64KB