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Analysis

  • max time kernel
    133s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 03:33

General

  • Target

    2024-06-02_4aa3b1479f52016222a125b1ae7afb25_cryptolocker.exe

  • Size

    73KB

  • MD5

    4aa3b1479f52016222a125b1ae7afb25

  • SHA1

    2b79ba2bc7a84b5003ab3c50b492f63e05be94ca

  • SHA256

    4d65913d112f4046bef916a0b722da189382039a1319bd4f0a4a5b35414f6b42

  • SHA512

    46394a2ca8305a90807f11cd41cbb4dcdc5c4598775016e1a7cc53205ce9695b8993b9d670913e2b26eba038ea6bdadae53fa7df498a8787e2e029ff6e3cf7df

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/R/:vj+jsMQMOtEvwDpj5HZYTjipvF24ff

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\2024-06-02_4aa3b1479f52016222a125b1ae7afb25_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_4aa3b1479f52016222a125b1ae7afb25_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1692
    • 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:2904

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    73KB

    MD5

    256abd6c4d51cc604c433cdaeee4b5bc

    SHA1

    281cb4e0b2bf2a673d4c8f4d57b0dacb292c509d

    SHA256

    6c4c28282462cdaf6d0e09d2bb879f08a70a618d1279ce97934b94ba25d52836

    SHA512

    f5add0bbb76137a6147de97b9385759c114ae9eabe45633f6404351fc9824003e292b697839499fc262d0c9340bc4485464c214b5650ab54e03f518e775e1c87

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1692-0-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/1692-1-0x0000000002070000-0x0000000002076000-memory.dmp

    Filesize

    24KB

  • memory/1692-8-0x00000000007B0000-0x00000000007B6000-memory.dmp

    Filesize

    24KB

  • memory/2904-17-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2904-18-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB