Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/03/2024, 13:24

General

  • Target

    2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe

  • Size

    53KB

  • MD5

    06645ea8bbc515db86efad97e2b3d107

  • SHA1

    5870c7618d8145ccdd95d8ab4c1f8b4d812d7b65

  • SHA256

    47f1340084e8246053edd146578c808184ca5a36933ab8ebb8b99d483364c3dd

  • SHA512

    e4aa65b294daea0005a803fdce9997a1ec9e245c9f7fef91f20b410cbbf32fca2254d40a19e317e25e8de59f679f6b7bac726f848e80ea3f266c6177e7eb5a04

  • SSDEEP

    1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyT:BbdDmjr+OtEvwDpjMA

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 2 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
  • 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\2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1020
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3332

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    53KB

    MD5

    a493a31f5d09c6bbf02902d6388c10ce

    SHA1

    4b7d40d65d800c368edb12b43102eb1bf33508f3

    SHA256

    d7abb18ca450581542c197f8a3abb1be322e2ceb4708da708c19225d87d07fb8

    SHA512

    7699af10b95f9dd4d05b14db859588bed1a93aad1de8b963eba6d2c9e6ef5324dfaaf190df7c8a263b706be573812e629fe3ecd7caa3c8066473a52df20ae527

  • memory/1020-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1020-1-0x0000000002140000-0x0000000002146000-memory.dmp

    Filesize

    24KB

  • memory/1020-2-0x0000000002140000-0x0000000002146000-memory.dmp

    Filesize

    24KB

  • memory/1020-3-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/1020-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3332-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3332-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3332-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB