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Analysis

  • max time kernel
    86s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/01/2024, 21:53

General

  • Target

    2024-01-23_d7626059199d25088154516d0844bb70_cryptolocker.exe

  • Size

    77KB

  • MD5

    d7626059199d25088154516d0844bb70

  • SHA1

    017a936094a39a513c8e9e52bfc5906e17fe30c4

  • SHA256

    65a7280968f66b4aeffd9cc81acdd26b96c6c00512c8a3c50088f1e68f04edd4

  • SHA512

    063adea8b7290700e70576b8561d348bc9def8118d39c897eae10f558c17ca86f49cdbb56a9e6d1594d584933172313b1ef0e1212472149cbed80fbc6b946849

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIufw:vCjsIOtEvwDpj5H9YvQd20

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\2024-01-23_d7626059199d25088154516d0844bb70_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-23_d7626059199d25088154516d0844bb70_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:4032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    77KB

    MD5

    a8a2ebf3456f90649d4a2a9261acdeb7

    SHA1

    5a462e92c6e35c3e107bdfcc68b3224451a911d8

    SHA256

    88ad95504ca2cb2a0a223d09e8e2fd15315807fd2302382b61c8b3abf4b10454

    SHA512

    75ddbe77a54a6dbbf22877912181ceacf55ed43deddff5d77af4a279d1a88e02ea896b92b3b6fbca8e5adc27db9617a96517330f31e702703e608e59b2953861

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4032-17-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/4032-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4160-0-0x00000000006F0000-0x00000000006F6000-memory.dmp

    Filesize

    24KB

  • memory/4160-1-0x00000000006F0000-0x00000000006F6000-memory.dmp

    Filesize

    24KB

  • memory/4160-2-0x0000000000710000-0x0000000000716000-memory.dmp

    Filesize

    24KB