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Analysis

  • max time kernel
    142s
  • 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
    27/05/2024, 13:29

General

  • Target

    2024-05-27_f873379eaa3a9a7abdd84c5ca49c55c0_cryptolocker.exe

  • Size

    82KB

  • MD5

    f873379eaa3a9a7abdd84c5ca49c55c0

  • SHA1

    7ad5d0291e838828d1fbe8f8d26e8cf0bdc03407

  • SHA256

    7d0d056aa0a0f61006f8be13d5256387fe96111c3540dad416d6a8bdc8b90d22

  • SHA512

    891309ee9fc30659242be71b871c5449227df6b051e2ea37a41a45d2ffa9755e59f6dc701ab66f026e61637802eb5d018b34f76d8ddcf870c9ad33370f56c9a1

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrM1:TCjsIOtEvwDpj5HE/OUHnSMM

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 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_f873379eaa3a9a7abdd84c5ca49c55c0_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_f873379eaa3a9a7abdd84c5ca49c55c0_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2960
    • 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:772
  • 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=1348 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3924

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      82KB

      MD5

      3fcc3ff1decf08629b9b06a3482aef56

      SHA1

      f51138989596a36925652b8d767158b54db57d62

      SHA256

      25940afeacac7264e27e2471d94f058eee9d6fbd433914bfbfdf1de6da5d9f70

      SHA512

      161bda6550a9dfbd38dae5e784621cb12c1e2bcf2b6f29d2e2a7f1e268c57057be4a185a65313b4b745bec09f5a5ab9f64e34b42954a1bd3eb884850a12071b3

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

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/772-18-0x00000000005A0000-0x00000000005A6000-memory.dmp

      Filesize

      24KB

    • memory/772-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

      Filesize

      24KB

    • memory/772-48-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/2960-0-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB

    • memory/2960-1-0x0000000002280000-0x0000000002286000-memory.dmp

      Filesize

      24KB

    • memory/2960-2-0x0000000002280000-0x0000000002286000-memory.dmp

      Filesize

      24KB

    • memory/2960-3-0x0000000002190000-0x0000000002196000-memory.dmp

      Filesize

      24KB

    • memory/2960-25-0x0000000000500000-0x000000000050E000-memory.dmp

      Filesize

      56KB