Analysis

  • max time kernel
    93s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-04-2024 21:41

General

  • Target

    2024-04-05_c544a7487a635845bb2ac6eaa019fda4_cryptolocker.exe

  • Size

    63KB

  • MD5

    c544a7487a635845bb2ac6eaa019fda4

  • SHA1

    0f774f995ad654fb67ba1fb66c88e5044ccc7a36

  • SHA256

    ab7b8867abac0a6902d057d936e96ae197cb762fa2e243a2998b85c27f7784a9

  • SHA512

    01006e4d2cfa886936909472aebf203d165ecf8246adc86c84f084a024b3cb89bb2a51c1d3c99c3e20b7c4e85daadac92cb610437dd476edc7536077c631459a

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVzCBR4:zj+soPSMOtEvwDpj4kpmeLmnZ5

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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\2024-04-05_c544a7487a635845bb2ac6eaa019fda4_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-05_c544a7487a635845bb2ac6eaa019fda4_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4496
    • 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:424

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    64KB

    MD5

    7b7a9b9d2bb85d5a5aca4b98cd0038c1

    SHA1

    c96a836f52efd41e8dc0cedd6b3d567bbc0e39b8

    SHA256

    d6abcd63632d05e561257d43aa7742d4e027a8d22bb8b103e7827a55c2ccb6de

    SHA512

    5d41b78e211291726fd3ea5264e7c41b014d856cbda6cf4f7d2e1d625b2837c26d098b6661d348cb4ae7f6171d91e7122a390a5fac7fac9ff030d2000d4fc0aa

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/424-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/424-21-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/424-48-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4496-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4496-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4496-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4496-3-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/4496-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB