Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/04/2024, 21:40

General

  • Target

    2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe

  • Size

    109KB

  • MD5

    584e9daafdacb3fc3784835891098c64

  • SHA1

    ec212025600cfa4d22954b936098e207b417bf9e

  • SHA256

    30f8fe697ec618b721de76c95050f607ba2ffa4ebfcd938eb997f43c294cea27

  • SHA512

    b743f698206c30f4ea00f9df25f6ae12eb02311e56f9368a0bdc58ff099385472ea8a97fabf7388cc78e32599ad8c93e59ab04c8b5121c72446e7c091046bc04

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwMgW:z6a+CdOOtEvwDpjczq

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\2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-17_584e9daafdacb3fc3784835891098c64_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4856
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2888

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    109KB

    MD5

    dfc35a100f43d72bebab2a75c4502d9d

    SHA1

    758214e806f87b7238dd231a3b512bb9eadcebe9

    SHA256

    55f46db1697890df5d738e601d35af772c4f20c48cfec60cfe7796ace530e610

    SHA512

    916a11adf49eed120251368dee0cc485cfd54b977c150b42025fe51b71de6660a7d80c7d4349afd9581f374a21ee5d1717e9ef3f8353a62c5f979222ded48fb7

  • memory/2888-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2888-22-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB

  • memory/2888-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/2888-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4856-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4856-1-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4856-2-0x0000000002210000-0x0000000002216000-memory.dmp

    Filesize

    24KB

  • memory/4856-3-0x0000000002240000-0x0000000002246000-memory.dmp

    Filesize

    24KB

  • memory/4856-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB