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Analysis

  • max time kernel
    135s
  • 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
    27/05/2024, 09:30

General

  • Target

    2024-05-27_37f4c4a4d480797ccc135137215ee12f_cryptolocker.exe

  • Size

    65KB

  • MD5

    37f4c4a4d480797ccc135137215ee12f

  • SHA1

    ef13484a1d72c5ef0bcbac8f0b25842677bd71e6

  • SHA256

    a13448bce4c0ac2641fb3ef7253ed3a46d0354486868ece45180ca4364d73876

  • SHA512

    54d584e4c51cba31acabd61f9199b3fa3e0243b592be3c19a444afae6c61a647859abdf5bddf8e5dc833f143f0eed097a4d351f8fc6c21697217ab9b270f1907

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMTIzY1:TCjsIOtEvwDpj5HE/OUHnSM+

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-27_37f4c4a4d480797ccc135137215ee12f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_37f4c4a4d480797ccc135137215ee12f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4160
    • 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:3492
  • 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=3888,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=4168 /prefetch:8
    1⤵
      PID:3636

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      65KB

      MD5

      3cbcc6d24cbb3738c1147079419a2c2d

      SHA1

      67ad5e6e5f20192713f2c55e1b7de1e13e311a2a

      SHA256

      1f51bd1f3792c1daf5ca6be8917d190ea27b09e084d75a9a203114efcafe1f80

      SHA512

      cfe18a28bac09c0d4c72fccef34f7b592e78d11ff5de2de20f24b9ffc3c48db253760d5b556c784c1761b4749cb91c5ac2b59e182989b2b1b450a0da3839031f

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/3492-17-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/3492-21-0x0000000000750000-0x0000000000756000-memory.dmp

      Filesize

      24KB

    • memory/3492-26-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/3492-49-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/4160-0-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/4160-1-0x0000000002150000-0x0000000002156000-memory.dmp

      Filesize

      24KB

    • memory/4160-9-0x0000000002150000-0x0000000002156000-memory.dmp

      Filesize

      24KB

    • memory/4160-2-0x0000000002070000-0x0000000002076000-memory.dmp

      Filesize

      24KB

    • memory/4160-16-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB