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Analysis

  • max time kernel
    143s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 15:24

General

  • Target

    2024-05-21_05a2aadbf5d6f563d459ed920673c4ef_cryptolocker.exe

  • Size

    48KB

  • MD5

    05a2aadbf5d6f563d459ed920673c4ef

  • SHA1

    5cf172f682b8c08cb59a3a5d58d915b5a4fbd163

  • SHA256

    db75ca581963fd28f90f94ae8ddf48bb5976a577426de94f1cb961da171c7426

  • SHA512

    da0c672f474264691ab6acff838a8229d330e2421441f7672312015a1c66fd026ccc5e2a6fbee96bda52602f40b586b02c5e50260349c6a219d85ea08bb14747

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr42A7n0FmB0nk:vj+jsMQMOtEvwDpj5HczerLO04BH

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\2024-05-21_05a2aadbf5d6f563d459ed920673c4ef_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_05a2aadbf5d6f563d459ed920673c4ef_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1780
    • 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:656
  • 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=3976 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4060

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      49KB

      MD5

      3ec638db9b3242c3ec4dd8ea6f57bbf8

      SHA1

      e0018978686fe433969de07855124b622a0f001b

      SHA256

      56f730e1121d6e5381719b1cf009d819e99f87c59bb93a192ce8951f18e12728

      SHA512

      b9f0f36b1c6a308ec1e0162317a50485971de49c21218e1fa2515eaca79089b7e92b0ea3d3e200da573733c20d89fcc50f8a746648a244bae3f50e5f5df7399f

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/656-17-0x0000000000860000-0x0000000000866000-memory.dmp

      Filesize

      24KB

    • memory/656-23-0x0000000000660000-0x0000000000666000-memory.dmp

      Filesize

      24KB

    • memory/1780-0-0x0000000000600000-0x0000000000606000-memory.dmp

      Filesize

      24KB

    • memory/1780-1-0x0000000000600000-0x0000000000606000-memory.dmp

      Filesize

      24KB

    • memory/1780-2-0x0000000002250000-0x0000000002256000-memory.dmp

      Filesize

      24KB