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Analysis

  • max time kernel
    134s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/05/2024, 05:32

General

  • Target

    2024-05-04_5b8f2925f8659cf175c0ed287ad17883_cryptolocker.exe

  • Size

    83KB

  • MD5

    5b8f2925f8659cf175c0ed287ad17883

  • SHA1

    6334ae9b59988d11b9234696d2014ee470d75bf6

  • SHA256

    4cb7005140110b288a083941cf9c5581f927168894ccd1fbe540d47dd3463348

  • SHA512

    6b2e3ec313e4ccaeea1557e7b9af3dcfbc94ad9796e4bb6d87c22e93973eb228b7804b2522175083334c74666c177206273208642c242e290a8ae9b1baeeb3c7

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrho:TCjsIOtEvwDpj5HE/OUHnSM0

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\2024-05-04_5b8f2925f8659cf175c0ed287ad17883_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_5b8f2925f8659cf175c0ed287ad17883_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4624
    • 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:2608

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    83KB

    MD5

    ec7bd95312920ad08ab4df6ddadec3e7

    SHA1

    c4594d5c0887a544241024c170e3846a0d1447f6

    SHA256

    e6b7604d77b961d33050d3a9bd2efd009e3694d29b53525d5fae5bbf7ccd3a3b

    SHA512

    3eca4c5a83c1088bce2348d55a7853795ad2e06b57387319fcaf8b7e496f40063c5849601a71051cb4c3c38685935ecff125c1098b2244eadd091f13f3134161

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2608-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2608-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB

  • memory/2608-26-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/2608-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4624-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4624-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4624-9-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4624-3-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/4624-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB