Analysis

  • max time kernel
    141s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/02/2024, 16:41

General

  • Target

    2024-02-14_3de0109df4e555fd0366137e3f28d037_cryptolocker.exe

  • Size

    80KB

  • MD5

    3de0109df4e555fd0366137e3f28d037

  • SHA1

    8ebec187d14f18564c6230fb77417b8db0d2af45

  • SHA256

    ec3910f3a58c9df82f59b2faa4eb4bc34ccbec4d593b1c37ed9744db0a8c9d59

  • SHA512

    6abb7432e731a1400325f31a7fcf8d870b60ea6ff2ca2252576e878895b5ffbbc9e43c0ca0b8186970542fd6655122d66477dbc8fc605d9bb290a9f3f61aa048

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMo:TCjsIOtEvwDpj5HE/OUHnSMC

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\2024-02-14_3de0109df4e555fd0366137e3f28d037_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-14_3de0109df4e555fd0366137e3f28d037_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4968
    • 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:3308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    80KB

    MD5

    345382d870c642377291c953f11f07ac

    SHA1

    a415b1c386d5f5e3450e66c8ded99a70aee5039d

    SHA256

    400fdd99e0567d7b301c4fcd86dcea431f6346d6f9f9dcf14581f4d4d2fc1bbb

    SHA512

    152b447ce4bdb23243d9e1966dea08502395d2e909c3a9d814d71592ac8b9ac574bd235eef2253db3a01d411485725b4cc02035247d0899d11ca55d0403e2dd1

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3308-20-0x0000000000870000-0x0000000000876000-memory.dmp

    Filesize

    24KB

  • memory/3308-19-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/3308-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4968-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/4968-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4968-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4968-3-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4968-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB