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Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/02/2024, 05:21

General

  • Target

    2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe

  • Size

    114KB

  • MD5

    ed31749da19614babd662e6e91eb713f

  • SHA1

    b126c3d45c8dd3dca47189246bef6cdae1d82b35

  • SHA256

    35bb92a252f5572800db00e8182e5b2c7e241fb3b8e6233f4d3084ea42ecb117

  • SHA512

    1d6c263bc171f543f0810505e8215b3c4a027bc75a65acedd42818dd7d1dc7e91f2c17f16aec2580a40e8003b3bda0f870740444369f989d1e642c951c8b4297

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01M:z6a+CdOOtEvwDpjcza

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_ed31749da19614babd662e6e91eb713f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3252
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3468

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    115KB

    MD5

    a55d6bb0cab213982d7ea8e67a022944

    SHA1

    2162e6a6bf09e603a450e4fdd9d09681a9b6ecb2

    SHA256

    8054681f596e7ed18a3044a3fcdb33bb052fe75b60eeec46bdb4b78e9d21a422

    SHA512

    6cb40febe205a472c753fbc873c5e2693090b705805bf430a11639c4960a91526a45250a730ef713588f936775cbbb2c20eb6a83d1c19dee8b3ef4e8ddefc5e4

  • memory/3252-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3252-1-0x0000000000690000-0x0000000000696000-memory.dmp

    Filesize

    24KB

  • memory/3252-2-0x0000000000690000-0x0000000000696000-memory.dmp

    Filesize

    24KB

  • memory/3252-3-0x00000000006B0000-0x00000000006B6000-memory.dmp

    Filesize

    24KB

  • memory/3252-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3468-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3468-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3468-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB