Analysis

  • max time kernel
    141s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 10:24

General

  • Target
    2024-06-03_00e0ea5a712e73fc83723b4ea906164b_cryptolocker.exe
  • Size 37KB
  • Sample240603-mfcntabb71
  • SHA256 ae1316bf3082f8c6e5dff5629f9373d51c0c8d741018d6fee4858f22663106ee
  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_00e0ea5a712e73fc83723b4ea906164b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_00e0ea5a712e73fc83723b4ea906164b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1600
    • 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:1216
  • 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=4060 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3920

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          misid.exe

          • Path C:\Users\Admin\AppData\Local\Temp\misid.exe
          • Size 37KB
          • SHA256 6e4fe8c3cd5d23f49a7013bcf3cd52989b1e61e638ab6eb63429770253f230de
          • MD5 SHA1 SHA512 SSDEEP

          misids.exe

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

          memory/1216-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

          memory/1216-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

          memory/1600-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

          memory/1600-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

          memory/1600-2-0x0000000000810000-0x0000000000816000-memory.dmp