Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/02/2024, 17:38

General

  • Target

    2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe

  • Size

    34KB

  • MD5

    5c1398d8bf8f62c68ea581b470a2c497

  • SHA1

    eddc234dd6f340c4e5997a5cc03c54dbe186c345

  • SHA256

    7a5acd9fd0adcb951f40cfe533c8f7dd9f7a19ba56487b3b606108097f976c53

  • SHA512

    d3b041b732d86763977e828fd60807ce147085fe27649e4e99762442e7a264ce69230f19c8cad33c1acf2c7d7f9041a8c7ef638202cdca113f70187d6faad4f4

  • SSDEEP

    384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjNc9:b/yC4GyNM01GuQMNXw2PSjH+PPNc9

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Users\Admin\AppData\Local\Temp\retln.exe
      "C:\Users\Admin\AppData\Local\Temp\retln.exe"
      2⤵
      • Executes dropped EXE
      PID:4932

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          34KB

          MD5

          ffc35fc562442f6fb46cf352f3461d5f

          SHA1

          0618fba8726f5b3d299c088e6b99577561bfa061

          SHA256

          a2d5d7599d88262c21f0a916d10fbe3e3ea62acc4aaad79acd5533869f858c91

          SHA512

          4c23d24956700318e8a13b59a82df525be737546f09462aa4bca04c29b0aa0a42c9d501e5139975c2ff6798ce10fd2d6d6d021b1c5f0b3d2caf9c99a982e2fd7

        • memory/1612-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

          Filesize

          24KB

        • memory/1612-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

          Filesize

          24KB

        • memory/1612-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/4932-22-0x0000000002210000-0x0000000002216000-memory.dmp

          Filesize

          24KB