Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-04-2024 07:31

General

  • Target

    2024-04-10_508446d2d51c3ca9b512f54349bce1ac_cryptolocker.exe

  • Size

    64KB

  • MD5

    508446d2d51c3ca9b512f54349bce1ac

  • SHA1

    06074d5c9d779ec3712f39c10be7fade511b486a

  • SHA256

    059b4343645afe79e25c48dbde8585526d9ded2228873582ecbfaa64a797b15f

  • SHA512

    461e37e3baa7e38fff7535616f540e80397c099154453dd6e34fa86bbbf929a7ae6b6e81501c517a05baad4d2391fa8ff399b4a7a9f279624b457985ff2f57f8

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyk:TCjsIOtEvwDpj5HE/OUHnSMY/

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\2024-04-10_508446d2d51c3ca9b512f54349bce1ac_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-10_508446d2d51c3ca9b512f54349bce1ac_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2056
    • 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:3824

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    64KB

    MD5

    7c1c8a64ccfc75b985e6aabdb2f6c3c1

    SHA1

    0d314c9800fd41d0d90d8d3f18aac229e80ac371

    SHA256

    7358162a9a65925a9aeebf627c9b014b85c67d2088dfa5e3eb6b20605c9372ff

    SHA512

    339b8515531e31e5b1116a36f3050ca5ca74baa4f73e44a2cf659f7ebc0295b5fe9d020d8c111e9007200a9168e3c643777c8128f75741ef7721c8b16a1c4c5d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2056-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2056-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/2056-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

    Filesize

    24KB

  • memory/2056-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/2056-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3824-19-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3824-25-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/3824-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB