Analysis

  • max time kernel
    142s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 14:25

General

  • Target

    2024-05-21_260931d306915f4970bf1e9a3f0fff0d_cryptolocker.exe

  • Size

    43KB

  • MD5

    260931d306915f4970bf1e9a3f0fff0d

  • SHA1

    f12cfc08c9b037320bb6a10923213a8a54071d13

  • SHA256

    22100a6a2b8fb7d43dc6a496c56c9c295a6ddb9f24b8cd809398ba919af7b58a

  • SHA512

    a6452148b98b57e75c24aa24d30acdce7217214d82aa54602f091e0b19ed2f7e41506e8b74674618080a955612de428e906fb11aece570152ee3c81103d8850d

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/aDU:6j+1NMOtEvwDpjrRf

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 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\2024-05-21_260931d306915f4970bf1e9a3f0fff0d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_260931d306915f4970bf1e9a3f0fff0d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4500
    • 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:916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    43KB

    MD5

    1ec55bd243100042ad82856701f83907

    SHA1

    0974b394e1cd0a458859c2d2b7a032cfaa784b11

    SHA256

    ec837a03c1d38d8926d4d0acf7f49bafc63117364c951a685d2bbe86eeee24a7

    SHA512

    c22498bc3d6d9ce50314215b195d8f0b13650bf11da389abd2a77b0414ffd674f3e6c7a06d54bbed8084eb6d6149fe7cae1ea8861a6d8992a3dc1825aad98e53

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/916-16-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/916-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/916-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/916-49-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4500-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4500-2-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4500-1-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4500-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4500-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB