Analysis

  • max time kernel
    128s
  • max time network
    137s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/06/2024, 03:52

General

  • Target
    2024-06-13_dc73e9787e443696011245939e6900a7_cryptolocker.exe
  • Size 63KB
  • Sample240613-ee99paxbjp
  • SHA256 059eef54c0a868121ad2df0924639d4f622774250368e5217fde1d2da48fd669
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-13_dc73e9787e443696011245939e6900a7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-13_dc73e9787e443696011245939e6900a7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:716
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      PID:2332
  • 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 --field-trial-handle=3964,i,6522675234395427298,2952738987384583032,262144 --variations-seed-version --mojo-platform-channel-handle=2812 /prefetch:8
    1⤵
      PID:2640

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          gewos.exe

          • Path C:\Users\Admin\AppData\Local\Temp\gewos.exe
          • Size 63KB
          • SHA256 c67f817fba82ae5e7864ef14cd12e00dec62d9e673a8a692e6511522b82a15df
          • MD5 SHA1 SHA512 SSDEEP

          gewosik.exe

          • Path C:\Users\Admin\AppData\Local\Temp\gewosik.exe
          • Size 185B
          • SHA256 11b8a6b33da5288befdd8130ee36798a7711d1746a4551d6653b5565a987278d
          • MD5 SHA1 SHA512

          memory/716-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

          memory/716-1-0x0000000000400000-0x0000000000406000-memory.dmp

          memory/716-8-0x00000000021D0000-0x00000000021D6000-memory.dmp

          memory/2332-25-0x0000000000710000-0x0000000000716000-memory.dmp