Analysis

  • max time kernel
    135s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-05-2024 23:46

General

  • Target

    2024-05-21_c2f54608ff3bced4ee99a3fe22ca63f7_cryptolocker.exe

  • Size

    77KB

  • MD5

    c2f54608ff3bced4ee99a3fe22ca63f7

  • SHA1

    0ab0aa115e34df19d67933fa9ebd737d3763eeb8

  • SHA256

    301b54eaecdb91b8b049c58e0e6e31bac304e1f3f5f3cb7fe2293cb32dafe32e

  • SHA512

    23535c02326ed6ed682dc3a563319dd9a5cf570875a5ca4e7d7e30e7c8a71d7f039f116390cc539c6b520b12aacdb28ea55348e3a41f22fc9ad5d0eb1165b2b9

  • SSDEEP

    1536:vj+jsMQMOtEvwDpj5HwYYTjipvF2hBfIufv:vCjsIOtEvwDpj5H9YvQd2r

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_c2f54608ff3bced4ee99a3fe22ca63f7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_c2f54608ff3bced4ee99a3fe22ca63f7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4272
    • 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:1896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    78KB

    MD5

    041cf3be8394af7d800b414bd3e041e7

    SHA1

    4e887521a4eb383fe826e3102d1b4bb622a41b1b

    SHA256

    f222929216eb3f75299c07a360e2bb9354ed206da539a6cfa96144f6a0ceeca7

    SHA512

    1564b0ac3b353082532903dd4352d980c1c47fbe20499ed848e25e073f22f4e6270f3729e91719deb632af9302f0a2109eafc9dd68847e9cbed24b67a049a39b

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1896-17-0x00000000006F0000-0x00000000006F6000-memory.dmp

    Filesize

    24KB

  • memory/1896-23-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4272-0-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB

  • memory/4272-1-0x0000000002060000-0x0000000002066000-memory.dmp

    Filesize

    24KB

  • memory/4272-8-0x0000000002150000-0x0000000002156000-memory.dmp

    Filesize

    24KB