Analysis

  • max time kernel
    88s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-02-2024 06:20

General

  • Target

    2024-02-13_f689e540beb7d01b01851d4daa68f17f_cryptolocker.exe

  • Size

    51KB

  • MD5

    f689e540beb7d01b01851d4daa68f17f

  • SHA1

    a5446106519d1164ca9c3a79a2f35cb2051cc6d4

  • SHA256

    8aa5a5ac03677724d0acac6fa84414138279c606dbd67f9e354211cd6313b39e

  • SHA512

    66fe8afdaed2d584364719c01a5bd54a02749d18c1c309892c28b107e2c70c9c85ba54a6ac1eabd24bc33b473ce37e5ae413274264508f62a0545f27782a1d49

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdO5Ya:ZVxkGOtEvwDpjcf

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 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\2024-02-13_f689e540beb7d01b01851d4daa68f17f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-13_f689e540beb7d01b01851d4daa68f17f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:408
    • 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:320

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    51KB

    MD5

    924a468780e09a3611c1c469b43dd6fb

    SHA1

    c981daa52991bb10bafd6be5f60fb94cfe6ea330

    SHA256

    d1e4bd8888e7ed74040e8e7adae6d4f281088ecf69186d6ff9625a4e9aa5fcb2

    SHA512

    8464d2ee730400bbc290f562a511868b4b94c6f1633f858f746a17d5454223d7deaec7b389ef7d955f6336325547cd7e4d2247cc3ebc55ed9ec19fcc164e9646

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/320-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/320-20-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/320-26-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/408-0-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB

  • memory/408-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/408-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/408-5-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/408-17-0x0000000000490000-0x0000000000493000-memory.dmp

    Filesize

    12KB