Analysis

  • max time kernel
    129s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 02:35

General

  • Target

    2024-05-22_5e95cee1d1c60403802260565f01e5e1_cryptolocker.exe

  • Size

    70KB

  • MD5

    5e95cee1d1c60403802260565f01e5e1

  • SHA1

    09b98d9781e22d8d167d95cd537ffdf73fb982a2

  • SHA256

    117e1ff2ebff6665bf5012bcbabb0e3a92d705b9f163146b01314623887ff3b3

  • SHA512

    8dc6181d5cd818f292d0a70a44f361e3341da6873f07f9dc287bf08443a9ed780969d3f25020848d891ac302bbc933aa15baa248777be497615b4fe0a572a035

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/R+:vj+jsMQMOtEvwDpj5HZYTjipvF24G

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\2024-05-22_5e95cee1d1c60403802260565f01e5e1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-22_5e95cee1d1c60403802260565f01e5e1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3728
    • 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:5028

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    71KB

    MD5

    c5379cbabe0e0859502fef6f5779c29d

    SHA1

    2ac58ba22f962c652508242fbf52b1f1ce4fe2a5

    SHA256

    638fbd8cc99ccf6d1633bc6c792eeba290bc542afacb203e56aa2308a740c647

    SHA512

    e343db5af33dd8b7d0e124ca6f93f0e652aa6fcbc54b2817374439f662af0f2d2342a239ce35fbd90a2e72e705f7ab359ad1de02f0890abf8a0395e67b9d60b6

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3728-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/3728-1-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/3728-8-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/5028-23-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/5028-17-0x00000000005D0000-0x00000000005D6000-memory.dmp

    Filesize

    24KB