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Analysis

  • max time kernel
    115s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 14:05

General

  • Target

    2024-04-06_402f2e33f3a863508492018397bf3577_cryptolocker.exe

  • Size

    89KB

  • MD5

    402f2e33f3a863508492018397bf3577

  • SHA1

    4670c93571a3232e9828d360599713af59d82b6f

  • SHA256

    94f2ef2d8ea0aff6bc9b15771e5599a5c932e3bc6cfd6ef6cd756e9b3f6148b5

  • SHA512

    7b8bb839a5f4680175d5533577ad583f285a95eda5cf47c1d1bb0ef2d57b5bd1ff72c213e926c61f118ad2d8ddd46a187d4fc2d6aac7b7f0698d30f8cf9450e5

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5H8u8rBN6nqEZNi1OkQoV:vCjsIOtEvwDpj5H8zPsa

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-06_402f2e33f3a863508492018397bf3577_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_402f2e33f3a863508492018397bf3577_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1084
    • 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:4232
  • 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=4072 --field-trial-handle=2972,i,4036376905309803364,5412922217215781933,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:404

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      89KB

      MD5

      406a3fa49043077f2719b131489f6dab

      SHA1

      3117b5f7a0eb41f779397ac9c70480f348e9fcac

      SHA256

      e48a2276e5f7bf204d2a5214ec2aa3d307b74fa0688a84371b165428d0198de6

      SHA512

      1c21eb43a2e52146c2fed1a3a064fa3b7dcbc519930d97025c72c43fb7e27a35af793af90aa4dfc245aefe196b73d697d4de214ede7df41dd0af5360ad6f206d

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/1084-0-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/1084-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

      Filesize

      24KB

    • memory/1084-2-0x0000000000600000-0x0000000000606000-memory.dmp

      Filesize

      24KB

    • memory/4232-18-0x00000000020F0000-0x00000000020F6000-memory.dmp

      Filesize

      24KB

    • memory/4232-17-0x00000000020D0000-0x00000000020D6000-memory.dmp

      Filesize

      24KB