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Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/02/2024, 19:55

General

  • Target

    2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe

  • Size

    99KB

  • MD5

    bac9c90bfc1aba30f7f1e346561ba66b

  • SHA1

    d18bde7922c91ab9fd4decc508e54fe60544d6cd

  • SHA256

    1726b9d5ced2ab7f5c30d08ccd8e6cafcf2525825deed08a7564b600337d582a

  • SHA512

    e7dc693ec189a60dc59270e1e77ed5b8ab49a630bb374b99414b6e0ef36f2f3c07504cc8252d85ea4b36d2bca56e02a64b8c2a6d11c5d2cd58d7006f2d65a69b

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2i:xj+VGMOtEvwDpjubwQEIiVmkxv/u

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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\2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-21_bac9c90bfc1aba30f7f1e346561ba66b_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Executes dropped EXE
      PID:3220

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    100KB

    MD5

    e15a4c14fa98d0990b774782620725c6

    SHA1

    8092a9ce3225d66e169efdfb748068923d9c146b

    SHA256

    0923726b7b4cd63b00a25f46ea6ca355c5803ad1db1b9dd01f94775c287a44eb

    SHA512

    8c95f550fa17b1fb86e840ec6099b42c1309a96d080cf419a3c80bc01cfd7ea987a7071f24bc26789889e1bef1586b14f891595a04455c809488c61e51fe78a6

  • memory/3220-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3220-20-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/3220-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/3220-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4604-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4604-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4604-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4604-3-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4604-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB