Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/05/2024, 03:05

General

  • Target
    2024-05-25_e824b6e9fa19acc1dcd7261ba9de4409_cryptolocker.exe
  • Size 72KB
  • Sample240525-dlnhtscd4x
  • SHA256 ce1fa45992f3b83180c750b7ffceed4c5aa6656b9108fad9cd25c3ae1d879685
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-05-25_e824b6e9fa19acc1dcd7261ba9de4409_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_e824b6e9fa19acc1dcd7261ba9de4409_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:824
    • 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:1860
  • 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=3992 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2712

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          misid.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
          • Size 72KB
          • SHA256 4ccc9b9ae7fe9f8771d6b3c65d8990d2afb6f4094e47242154c12fecdad82516
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misids.exe
          • Size 315B
          • SHA256 d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3
          • MD5 SHA1 SHA512

          memory/824-0-0x0000000000520000-0x0000000000526000-memory.dmp

          memory/824-1-0x0000000000520000-0x0000000000526000-memory.dmp

          memory/824-2-0x0000000000550000-0x0000000000556000-memory.dmp

          memory/1860-23-0x00000000006B0000-0x00000000006B6000-memory.dmp

          memory/1860-17-0x00000000006D0000-0x00000000006D6000-memory.dmp