Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 17:26

General

  • Target

    2024-01-27_4e0f633c2076a6bc8125e96d6f2351d3_cryptolocker.exe

  • Size

    52KB

  • MD5

    4e0f633c2076a6bc8125e96d6f2351d3

  • SHA1

    2577c61a91f716a6a3c1b15d83e554da3b7a229d

  • SHA256

    f9d731e318434729cdfb5c173afb1f8a6c8f0fc377fae9838f247d7ee3efd1a3

  • SHA512

    56ac5a9e8fee2f85e6e4f2ef1079260255322525b97fe1f4e32b7cad0b3f953ed0eee66a9b15406983fc06ee63f24c9e50ab03d44ba61b08c6e3ba21d5a09bd7

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5QJz7A:6j+1NMOtEvwDpjr8oxEq

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-27_4e0f633c2076a6bc8125e96d6f2351d3_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-27_4e0f633c2076a6bc8125e96d6f2351d3_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4520
    • 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:1904

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    52KB

    MD5

    7f3360fda38124d214d906f3547c93c1

    SHA1

    59da84f28bc6cc0fa2ab4bed4f0ccd45d2ea526f

    SHA256

    d303e24f30c81e805cdd5bc354f601494e2bc1cc13457ffa175a7265bca8ca8c

    SHA512

    330b6df41f074da9c53674ae87e355f43c34e803d1bed38740d10a818edc92ef36822299cae3790b98a4cb08d34d15b02c01e97f3e6caa7f8f97c9decbe3c261

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1904-20-0x0000000002140000-0x0000000002146000-memory.dmp

    Filesize

    24KB

  • memory/1904-19-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/1904-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4520-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4520-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4520-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4520-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4520-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB