Analysis

  • max time kernel
    142s
  • 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
    28/01/2024, 04:32

General

  • Target

    2024-01-28_50d3a25e0c14ea50ab495197d90b1973_cryptolocker.exe

  • Size

    61KB

  • MD5

    50d3a25e0c14ea50ab495197d90b1973

  • SHA1

    be87ad77ca93242baa749921d4af33c50c5ce5e3

  • SHA256

    bf2f47da1ccf6171d97e2b2462a8cbd0e820d6ce787cb3e43060f13d86309aed

  • SHA512

    4bc321f1a25239a9cc947d903999120b90feb30181eb73b5ddc290df9dc16ffaced7b29367c123726fbc3570a929ce888e64a55404e52e563ce6b644c590ddbd

  • SSDEEP

    768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEI4:6j+1NMOtEvwDpjr8ox8UDEH

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • Detects executables built or packed with MPress PE compressor 4 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-28_50d3a25e0c14ea50ab495197d90b1973_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_50d3a25e0c14ea50ab495197d90b1973_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4572
    • 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:316

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    7d655db90a743e73d6158a9f2cdd4434

    SHA1

    eb9a1840e200f1a7b788e9d1647b889d85b21d43

    SHA256

    864b4cf8c9bcfcf17199260cd2d0c7607e15e68a1a876a475bbae8a0ff35e17c

    SHA512

    499aa911b02253807dd6888753feeed8ca36bc1abc2cb98d4992ea98b7327cd14d2a6b208cfa69c7bc5c9633914285e3520c7f64a89e862e9608eb66a3120138

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/316-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/316-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/316-48-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4572-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4572-1-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/4572-2-0x0000000000840000-0x0000000000846000-memory.dmp

    Filesize

    24KB

  • memory/4572-3-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/4572-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB