Analysis

  • max time kernel
    93s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-05-2024 19:36

General

  • Target

    2024-05-09_f9788ce397a59478e3884281c6007c71_cryptolocker.exe

  • Size

    62KB

  • MD5

    f9788ce397a59478e3884281c6007c71

  • SHA1

    15cf778880aa00c543300d987ec4d713f44ee10b

  • SHA256

    f30b7ba2b7a7fe6dd62808c879a7553e5047f1b39fd99e72ded2fc59928a5b4b

  • SHA512

    1ade06bdd20116d31bafb71bf5a4c576034d73f73444947623874971e6e053fd6323889546410a39115f2dc8abfddf517e83b59f5353fef2ddabb3fabeb463df

  • SSDEEP

    768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XG9h:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWY

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-09_f9788ce397a59478e3884281c6007c71_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-09_f9788ce397a59478e3884281c6007c71_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3792
    • 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:4848

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    97c5aa7db90f50d4d77456197cf5d233

    SHA1

    01e6bf857950510a219bec8989563e4f4b973755

    SHA256

    5cc708504a5f24e2d379b1daecd54bdf6f4fcffc4ff561a0c69e9902a545507a

    SHA512

    1106607e56a66ad6766566493d8cde69c3a0939d044eae8df19acd7e65994ecb374f00989a2812f3c62ad55732fc87f9041d7a2a89efb298a9c960c54b051bd4

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/3792-0-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/3792-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3792-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3792-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3792-17-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4848-18-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB

  • memory/4848-46-0x0000000000500000-0x000000000050B000-memory.dmp

    Filesize

    44KB