Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 19:29

General

  • Target

    2024-05-21_5b0f4a79799602a69eb720178311bdd8_cryptolocker.exe

  • Size

    43KB

  • MD5

    5b0f4a79799602a69eb720178311bdd8

  • SHA1

    4dc35e7c597a625c063a026e6566f9cbc305d9ef

  • SHA256

    cbee76d036cd52f2ed0cc313f81f071d9f3aa29c7e0b7e95999eb9f2762e026f

  • SHA512

    e4de43d6c6bf1ee25195307e566f78e4204ea206f6fa0d302373a5f72c404231f83d0e3c51e0613571498cbbf8c9ac526fdf31cef9cc670f59353896ed832cdc

  • SSDEEP

    768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAIie0m:bCDOw9aMDooc+vAlS

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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
  • 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\2024-05-21_5b0f4a79799602a69eb720178311bdd8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_5b0f4a79799602a69eb720178311bdd8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3032
    • C:\Users\Admin\AppData\Local\Temp\lossy.exe
      "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
      2⤵
      • Executes dropped EXE
      PID:3504

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    44KB

    MD5

    37ada9b2f8d988358c7210b6d0fd69e5

    SHA1

    9aef232fcabe32724530f24b605564d88713e7eb

    SHA256

    c5fe20b9c26da88e50dda227d98a2a82b3f7606547797f3727109c7a2a08ae6a

    SHA512

    91bc0299070635f4c378d8cf2398c7d7032822830db28461cc5ee01ff6ce72473acc5fa065d1c1bdc215f5416ad913926c3a864cd21383eaa5c6ac5007b7f8be

  • memory/3032-0-0x0000000008000000-0x000000000800A000-memory.dmp

    Filesize

    40KB

  • memory/3032-1-0x0000000000490000-0x0000000000496000-memory.dmp

    Filesize

    24KB

  • memory/3032-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/3032-9-0x0000000000490000-0x0000000000496000-memory.dmp

    Filesize

    24KB

  • memory/3032-17-0x0000000008000000-0x000000000800A000-memory.dmp

    Filesize

    40KB

  • memory/3504-16-0x0000000008000000-0x000000000800A000-memory.dmp

    Filesize

    40KB

  • memory/3504-20-0x0000000000500000-0x0000000000506000-memory.dmp

    Filesize

    24KB

  • memory/3504-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/3504-27-0x0000000008000000-0x000000000800A000-memory.dmp

    Filesize

    40KB