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Analysis

  • max time kernel
    93s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/05/2024, 14:37

General

  • Target

    2024-05-10_f3a8a48bf0bc62225622ef1f3963986f_cryptolocker.exe

  • Size

    61KB

  • MD5

    f3a8a48bf0bc62225622ef1f3963986f

  • SHA1

    52e03fa3abc34c815f5c8062eb3b742d746472ca

  • SHA256

    da38b5551d4dd8b0d1acc749ee97a5c4a680fe21a449cb616793d81c0470aad7

  • SHA512

    a0c1032750e961fa6fddbc20c16ff1a857384cc1cdb042fda061730faef2f2692b0813b08869189b8dc15924276ebd16d7a771356b466cb1a6b96789bfd90ac5

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9+:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWz

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-10_f3a8a48bf0bc62225622ef1f3963986f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-10_f3a8a48bf0bc62225622ef1f3963986f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:624
    • 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:536

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    61KB

    MD5

    2f2b50997a7dc68face7efb106357417

    SHA1

    f6b56cf6e3916b9fc2a50b786c23257308646cee

    SHA256

    71f130820024ed7993d511c46368f5011e6c887f546c9c8690064f64216b8c45

    SHA512

    ed0ac7c9aacc1cc5cc03377a06b54801ede1b00ed103d938c5128c72117c64c0d72058d1665aa19e7d0dbe8d2fd645727113fc06e5c410c2e4c8a16e11d9de9b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/536-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/536-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/536-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/536-49-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/624-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/624-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/624-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

    Filesize

    24KB

  • memory/624-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

    Filesize

    24KB

  • memory/624-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB