Analysis

  • max time kernel
    147s
  • max time network
    153s
  • 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 07:47

General

  • Target

    2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe

  • Size

    62KB

  • MD5

    66d88d5004e13543b96ecf092b1022ab

  • SHA1

    0f255c3274ead41d281748f2c541e211349e5dc6

  • SHA256

    f8b0c76dbe5c6db978f9ce6d772f74dad39a4a6e70a9b9319448cb1d3e5e365e

  • SHA512

    cc16f099575734336f1259ea6bde0119542733b2873c81afb5cda33a2a1f677982efce08185d8471f21f34cae6accfcbe54fb22e70a3b690098f30aec8bffc6b

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVPr:zj+soPSMOtEvwDpj4kpmeLmn5

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-19_66d88d5004e13543b96ecf092b1022ab_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:4276

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    6161ee973365e16923668487a5771540

    SHA1

    a71b765b7523c09adcbf67d57bfbbf7f1282cdf5

    SHA256

    c8f87583cd2f410664b8f3ce7090d43caa574db6453ca7692538cb2de37050b8

    SHA512

    467f122dbe20c53fa22881726849dbba923701054c3612d4530c0755b42116e27323536a6bd6e82b3ef5e03af742132f1e8447568300c5b2420f3c129255a876

  • memory/4276-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4276-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

    Filesize

    24KB

  • memory/4276-21-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/4276-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

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

    Filesize

    64KB

  • memory/4728-1-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4728-2-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/4728-3-0x0000000000540000-0x0000000000546000-memory.dmp

    Filesize

    24KB

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

    Filesize

    64KB