Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 18:31

General

  • Target

    2024-05-27_61c544f09fa0e68d04821bac0b8d8c5f_cryptolocker.exe

  • Size

    41KB

  • MD5

    61c544f09fa0e68d04821bac0b8d8c5f

  • SHA1

    999dc5534cc80a9bc397caa335ddd4bbf85f22ee

  • SHA256

    75df42b13349bdc574bfa8fb83c1a7788895f15d13f78233db02a0e7d80b9260

  • SHA512

    13e604172d5dd83e65424f2ea39f6f0fde621261f04c41e566bc0c29e70e6d7aeffd083d3dc812b369616bdad587dd09cba706d280576a89bf071ffe50edc5a0

  • SSDEEP

    768:UEEmoQDj/xnMp+yptndwe/PWQtOOtEvwDpjLeJAsKuDkrj:ZzFbxmLPWQMOtEvwDpjLeJAsKcij

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 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\2024-05-27_61c544f09fa0e68d04821bac0b8d8c5f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-27_61c544f09fa0e68d04821bac0b8d8c5f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1508
    • 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:3600

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          41KB

          MD5

          7e8f198120ff6ac44adc22f948157b4c

          SHA1

          4926283e83fb82b3c9783c2484e7e4112277531c

          SHA256

          58f5cfe8c86997acc0bed2a1483340549629f8e534904a734f9fb4a4aa1a5992

          SHA512

          2ba8e69e9249f6ca09b3bcfada47592a7b7322343a173ad7724f99ec7becc4eb5477a1171d323b412ac41ed5f50896520ac307ba0ea43e6f85b967b91e39a0be

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1508-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/1508-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/1508-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

          Filesize

          24KB

        • memory/1508-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

          Filesize

          24KB

        • memory/1508-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

          Filesize

          12KB

        • memory/3600-19-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/3600-25-0x0000000000670000-0x0000000000676000-memory.dmp

          Filesize

          24KB