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Analysis

  • max time kernel
    133s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 03:37

General

  • Target

    2024-06-03_48638d1b7b3340b8e305a1f5a3ca5d3a_cryptolocker.exe

  • Size

    78KB

  • MD5

    48638d1b7b3340b8e305a1f5a3ca5d3a

  • SHA1

    b7d780fc2eb8eb40980f925952633e9ddb62acf3

  • SHA256

    a2bc944e3818e500a1d4fcbd213ca7cd6193f04448e6ced538fa344ee0a3edbe

  • SHA512

    86b45135e28bb9c8f90250d3b5368b6808b6ac22aacd8cf1846ec9b9a738881c9d1f9c8daee23550c91875c5938e0150a38d4295571854ca1a27ef1d65b476e6

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIufXi:vCjsIOtEvwDpj5H9YvQd2u

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-03_48638d1b7b3340b8e305a1f5a3ca5d3a_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_48638d1b7b3340b8e305a1f5a3ca5d3a_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4940
    • 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:3044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    78KB

    MD5

    0e545bd8f19108a964fd86ecece88348

    SHA1

    f97aedd2540d4d443a70958687b22a380c61867f

    SHA256

    4afe67f04cc20bc7991a4fc4dd1b0f07cf8c2e13c9487ea0f19bfd6b192da2dd

    SHA512

    b41621cb6bf46839507dbba70f7183bc2a1eb2adee34cc7fdf5d580ac467e2e17f3fac7efe355e55e7a15c12cf1f44fa99d2101ab05d3e20ddafdaf4e3a28a0a

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3044-17-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/3044-23-0x0000000000570000-0x0000000000576000-memory.dmp

    Filesize

    24KB

  • memory/4940-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4940-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4940-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB