Analysis

  • max time kernel
    89s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-02-2024 18:27

General

  • Target

    2024-02-13_f533a6cb94c43d991801ee633839b7a1_cryptolocker.exe

  • Size

    46KB

  • MD5

    f533a6cb94c43d991801ee633839b7a1

  • SHA1

    0fd2fb4d222c9160f8d15a89922f55f3f1abf2ff

  • SHA256

    96f2abc5cf87b238997334d0563f10239d348607479d301b478a9ed44cd87a2b

  • SHA512

    2b68af80a5cb9f4d50ac3c6ddd85e909bb8193c70e8c5566257d70c61ac79cd4ffe48b79f41294645af7f98f140c5c0e3a416601015a769f4a8d2e20db6c3229

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjIm8z2iaSIO/WZrEu/d+qmsUHQ1ws3:ZzFbxmLPWQMOtEvwDpj386Sj/WprqQ1p

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-02-13_f533a6cb94c43d991801ee633839b7a1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_f533a6cb94c43d991801ee633839b7a1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2280
    • 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:5056

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    46KB

    MD5

    d1d1a970b5958f0c3e0a488898daf7b3

    SHA1

    0069334a2e68f54fee474cd845434df3033adf3b

    SHA256

    c40429180700928a070142fb372f726bfab73e9b31de5006dc94f9c447200487

    SHA512

    9872881bf42a29b5fd44e138953c5c300c0afe7ffd842fa696e7d98728450ee3ac3bfb80ebed4eb65be517c2bd89cf2c8e4413bc2bff62f40e087db2ad53754b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2280-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/2280-1-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2280-2-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2280-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/2280-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

    Filesize

    12KB

  • memory/5056-18-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/5056-20-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/5056-21-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB