Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/04/2024, 19:36

General

  • Target

    2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe

  • Size

    70KB

  • MD5

    f9d3df8914f41148ee8ab42df2d18c69

  • SHA1

    a600e2f2dce6783936a8fe12cd4ec0c2efa31625

  • SHA256

    85632830ed80920b73cdfe69ad433388c2f3e0e61700ab344a9347ad3e2caf19

  • SHA512

    6cb49e5ec53f391388eb5e6677caf57c0c3c82ab0ddc09e59c0bdbeda506f0cd3e9a0a19d2baee829417558ead0216c288eb76d13df5a3bff39de4a93b21364c

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9g:C4Q2c94OtEvwDpj4H8zx

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 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 5 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\2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-28_f9d3df8914f41148ee8ab42df2d18c69_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4728
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      PID:5044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    70KB

    MD5

    d5f9b570223ef78d8c75eee8b3de4c3c

    SHA1

    7b17e5a4328852d493bc2a596efc82feffcb6b43

    SHA256

    7a319aad862e5db32bb03128f0319ef4e0538467040ddbc8b8ac07565f230fa3

    SHA512

    8d70ab7c14989bdafe7fad4df3bcb0246f17d38eda30aa03cae7940fe508f48884a3be44133c5876594c7c439432646750fe87df4abccccb24b385c4aabc2087

  • memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4728-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4728-3-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/4728-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5044-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/5044-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/5044-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5044-28-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB