Analysis

  • max time kernel
    148s
  • 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
    26/05/2024, 03:28

General

  • Target

    2024-05-26_1f8dfaf31bd19d43e092a8da4082baad_cryptolocker.exe

  • Size

    70KB

  • MD5

    1f8dfaf31bd19d43e092a8da4082baad

  • SHA1

    d481f1f49ec89fba87de6d215f2535ac39073292

  • SHA256

    7a8bf42c8e1eee5563511e4f6c4e3798209ed269358fc7fcea1468655ed0b470

  • SHA512

    781460739fba4646f72f409934ede228482cf419cd5555b4cdb6bfacd7a2c88d6e3610b87513e7603795f543f310612319908a09d12ff09c61700068823a3666

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4ZPsED3VK2+ZtyOjgO4r9vFAg2rq2g1B/R8:vj+jsMQMOtEvwDpj5HZYTjipvF24k

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\2024-05-26_1f8dfaf31bd19d43e092a8da4082baad_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-26_1f8dfaf31bd19d43e092a8da4082baad_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1476
    • 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:2192

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          70KB

          MD5

          5482b1c31ae9c75a926164b828d26856

          SHA1

          253143a4cd9b818152f1d79335162cd4871427ec

          SHA256

          dce8e539aeae5f63ca972a12f0ace716399ab36af8e092e47b5efe1bf0e349ed

          SHA512

          131ebea90a249d039017183e71700585c65778ab260246a03b250c9bbac6bebd100e5edad451b1b1157f6e7287f224bb1fdf3361b54ccccf4388f88b2fc77f06

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1476-0-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/1476-1-0x00000000006D0000-0x00000000006D6000-memory.dmp

          Filesize

          24KB

        • memory/1476-8-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/2192-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/2192-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB