Analysis

  • max time kernel
    134s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/05/2024, 01:39

General

  • Target

    2024-05-17_f88cb791a396a2c41692ab900022a6df_cryptolocker.exe

  • Size

    37KB

  • MD5

    f88cb791a396a2c41692ab900022a6df

  • SHA1

    ceceafc205055948983a53770f18e7901c533fb2

  • SHA256

    d50f0122259acc5505c25a93f1bf607ae5d8af39f901a15491196794ed9e06c5

  • SHA512

    b601e38c586e8411cb27d5cd8bf29293ca97287ad184c83a7c742b1187dff885beabf90c1df94fc665f54fc201e01dbc46c5e54268b7ed0053d41f670df237bb

  • SSDEEP

    768:fTz7y3lhsT+hs1SQtOOtEvwDpjfAu9+4qMg:fT+hsMQMOtEvwDpjoIH5g

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\2024-05-17_f88cb791a396a2c41692ab900022a6df_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-17_f88cb791a396a2c41692ab900022a6df_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3432
    • 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:3792

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    c7989b89abfa5c9d508fb6b9289609c1

    SHA1

    f944eb1857ace38694de68c9e74ef18a8365b621

    SHA256

    6dacfcfd9f7d6d898e11ecbd678df5bb346197d3f018870a990f112c8fcaea98

    SHA512

    cc85f22872e24a0f897cd830a3872155328d8bd330e231e7afcaf4337c2f23f3f5cde6f7af8b70cfdaa61b21be862772ac67b38dac2e18ebb2fd0f02ac96fdb7

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3432-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3432-1-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3432-8-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3792-17-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3792-23-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB