Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-04-2024 13:37

General

  • Target

    2024-04-06_76281cfb23622f69c118dbe3b85adf9e_cryptolocker.exe

  • Size

    66KB

  • MD5

    76281cfb23622f69c118dbe3b85adf9e

  • SHA1

    32663e7af039d096ff72ac218a2ac27c3c0241ea

  • SHA256

    b7f8c12ff845301d6bfe1c55859ebf6bed6f47f850cc6596980a17d84abb5cac

  • SHA512

    c2b3bc07015b7bff0a9b46f0a8d7f19b5acc364682f714ec7d6feacec0f33ee4868befe00c53d85758dae988a8993b9f1b9f7919b071d0fe40b278e5dacbb412

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEpE0P/xF6:6j+1NMOtEvwDpjr8ox8UDEpN/j6

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-06_76281cfb23622f69c118dbe3b85adf9e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_76281cfb23622f69c118dbe3b85adf9e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3332
    • 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:3468

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    66KB

    MD5

    f25d5fcc22d0351638cbb23a20c3ef33

    SHA1

    9d877a3124c6413979f2c18809bd7f329b880875

    SHA256

    cd60fde9572ea75d41b0e4c9c56ef8d5863aad063cfd636a2f94dd26b0bd22ed

    SHA512

    0c3385c2c1878fa9804779ef6bbc9b0bf5969367e358309fa734f0ca5e0d441269de3d01baeec58e904ac5a23167e527ace93182e804523d881b9e9ce0812802

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3332-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3332-1-0x0000000000530000-0x0000000000536000-memory.dmp

    Filesize

    24KB

  • memory/3332-2-0x0000000000530000-0x0000000000536000-memory.dmp

    Filesize

    24KB

  • memory/3332-3-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/3332-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3468-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/3468-19-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/3468-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB