Analysis

  • max time kernel
    134s
  • max time network
    126s
  • 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, 04:39

General

  • Target

    2024-05-21_35d2b798be45414354827aaf8e33a5b8_cryptolocker.exe

  • Size

    62KB

  • MD5

    35d2b798be45414354827aaf8e33a5b8

  • SHA1

    6a58e2f432cede271042e539ab366ff42e19658d

  • SHA256

    c4003466f341f9e36f3990bc13ee317c8b10a03209ced1b55a87c949b461d6bd

  • SHA512

    6dc61b635a37ccb519b2320b5ac13e8d1f2c0dfe582f90c9612672ce10f312dc881a6f3ec2786d61f9bf635bd0eca16e295e1b84b81d795f2cf09faecbb56869

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9Q: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\2024-05-21_35d2b798be45414354827aaf8e33a5b8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_35d2b798be45414354827aaf8e33a5b8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1404
    • 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:956

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    59d443fe85080d9d95e096c5fba82c31

    SHA1

    49e6ee73d69e4c44aad8da73a724db620ef77fb0

    SHA256

    cfe5aa8095b146b95c2500c7e6e46b7bfd538598807c5e4e8b9fc2f5e290df8b

    SHA512

    9811df3e91937a6f13d2e20505ccbef29b837c9b76cbc8506df7b1437cec54d99a8b5905dd8447eb3e9ddd62b070943c30b52f89e1417a986c12b168a9d5d1bd

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/956-16-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/956-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/956-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/956-49-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1404-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1404-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/1404-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/1404-9-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/1404-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB