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Analysis

  • max time kernel
    149s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17/05/2024, 14:43

General

  • Target

    c64f57f9b44d5aa023d7467c15d9218e.exe

  • Size

    22KB

  • MD5

    c64f57f9b44d5aa023d7467c15d9218e

  • SHA1

    d7e5749bc0f9df75c7e5f1ffad1eea6908a81b00

  • SHA256

    9e932649b42f6518a53d98e503bb409e3a13bf3ba417869c901913094e20f767

  • SHA512

    36cbf8873faf73eede168c9a4146479ca7710f03b4b7a00a1cd57cc8fb04b229ce16cc2bb930939c47556c0f109c0f5890a090a31588f5d6bf52ec6efd770506

  • SSDEEP

    384:UBWoC5GDr6wc/w3HgM6vDUTAXBGCVf4WVlFvX8Mb7a6M0:rRkiLw3HsDSARGG/MMb7rH

Malware Config

Signatures

  • Windows security bypass 2 TTPs 4 IoCs
  • Drops file in Drivers directory 1 IoCs
  • Modifies Installed Components in the registry 2 TTPs 4 IoCs
  • Sets file execution options in registry 2 TTPs 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • UPX packed file 8 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Windows security modification 2 TTPs 4 IoCs
  • Modifies WinLogon 2 TTPs 5 IoCs
  • Drops file in System32 directory 12 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:436
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
        PID:1376
        • C:\Users\Admin\AppData\Local\Temp\c64f57f9b44d5aa023d7467c15d9218e.exe
          "C:\Users\Admin\AppData\Local\Temp\c64f57f9b44d5aa023d7467c15d9218e.exe"
          2⤵
          • Loads dropped DLL
          • Drops file in System32 directory
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2368
          • C:\Windows\SysWOW64\rmass.exe
            "C:\Windows\system32\rmass.exe"
            3⤵
            • Windows security bypass
            • Drops file in Drivers directory
            • Modifies Installed Components in the registry
            • Sets file execution options in registry
            • Executes dropped EXE
            • Loads dropped DLL
            • Windows security modification
            • Modifies WinLogon
            • Drops file in System32 directory
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2740
            • C:\Windows\SysWOW64\rmass.exe
              --k33p
              4⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:3024

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Windows\SysWOW64\RECOVER32.DLL

        Filesize

        5KB

        MD5

        2b2c28a7a01f9584fe220ef84003427f

        SHA1

        5fc023df0b5064045eb8de7f2dbe26f07f6fec70

        SHA256

        9e00af53b1d0c0f5270d94a666d95aa7b4dcb9fea49487c210c055c9dcfcc9eb

        SHA512

        39192a8a91dec1abff25af8dac0cf39da4dfd51b3fb4f1ef0b4e776185d4280fbe8387c2ea778da7bbf2ce288b0bce4d23cbe8d9e87bbd250159044f5adbac78

      • C:\Windows\SysWOW64\ahuy.exe

        Filesize

        24KB

        MD5

        2ac11693baec477ffcaba6a6850ab289

        SHA1

        ad7bac386d4f8d514ddfa8543379f9d669daa0f0

        SHA256

        65e37ed9e515f4bf27d5636d353a65f708326c7d346085e1860c978642a26bfd

        SHA512

        6eb116ced41962f584ae3ceae0a7bd1b2b95bf05f948f3cb4d193595f5e97129fdfb6c1bebc9071f96c9be68d0ef21a0248aaeac10c6cf2a0369b36c2d07e014

      • C:\Windows\SysWOW64\ntdbg.exe

        Filesize

        25KB

        MD5

        5da2b8f1294e82fe03d8a95bc53d5275

        SHA1

        3b663dcbe19c5422cc2636db7a115dfc5204a635

        SHA256

        6de1a4f765bac7493b4c54167b1c1ff70e0ff04f4d01626352a218bf2cef69e6

        SHA512

        204d2ffdbb83cb539d80f2a9437763b1cf230e070e69537c35ac7df4888cd0963572ff4f95303acae7add9529b1507006c4b240d60b76bc8114be60a65676e93

      • C:\Windows\System32\drivers\etc\hosts

        Filesize

        1KB

        MD5

        b10b13206b0f2cf3968050072f6979bf

        SHA1

        699db21ba9cecf3f13ac3d76e22cfa41aa94da80

        SHA256

        0eef3217095cb97b695c434e74d6314bf9e869a013d6e9c88e58c34576a276b4

        SHA512

        d33bfd931be6676539507a69101d99fa4c5ef36b12422bd11f063b9b6a47b7444f6c4ad5f35e044714fdb872e96cd9fddf049e8329af1219483887f6ac5f4a5d

      • \Windows\SysWOW64\rmass.exe

        Filesize

        22KB

        MD5

        c64f57f9b44d5aa023d7467c15d9218e

        SHA1

        d7e5749bc0f9df75c7e5f1ffad1eea6908a81b00

        SHA256

        9e932649b42f6518a53d98e503bb409e3a13bf3ba417869c901913094e20f767

        SHA512

        36cbf8873faf73eede168c9a4146479ca7710f03b4b7a00a1cd57cc8fb04b229ce16cc2bb930939c47556c0f109c0f5890a090a31588f5d6bf52ec6efd770506

      • memory/2368-12-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2368-5-0x0000000000320000-0x0000000000331000-memory.dmp

        Filesize

        68KB

      • memory/2368-0-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2740-26-0x0000000000420000-0x0000000000431000-memory.dmp

        Filesize

        68KB

      • memory/2740-61-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/2740-101-0x0000000000420000-0x0000000000431000-memory.dmp

        Filesize

        68KB

      • memory/2740-15-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3024-27-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB

      • memory/3024-62-0x0000000000400000-0x0000000000411000-memory.dmp

        Filesize

        68KB