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Analysis

  • max time kernel
    151s
  • max time network
    170s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/10/2022, 11:59

General

  • Target

    bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe

  • Size

    661KB

  • MD5

    689481e740f42ffb4feba17baabddf60

  • SHA1

    f2dbbbef245ac76d7c337aa6f84a4816a7952391

  • SHA256

    bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337

  • SHA512

    eed17db502ca8bcde074c71cd69f37372df41e194175636ee16a3c4d278eeb849711c5a5f079ab150fe7ef1b85810b674bc4dd5924ccf3cdfe8fd765e746344c

  • SSDEEP

    6144:eVY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bco2KWF:egDhdkq5BCoC5LfWSLTUQpr2Zu19Q3

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • UPX packed file 2 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 7 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe
    "C:\Users\Admin\AppData\Local\Temp\bea4aac28a69027efe1af3ad387ce3f89d2b90ea6c9aa6460f64cc4126c38337.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3440
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /C AT /delete /yes
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3436
      • C:\Windows\SysWOW64\at.exe
        AT /delete /yes
        3⤵
          PID:5112
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\anhui.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:532
        • C:\Windows\SysWOW64\at.exe
          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\anhui.exe
          3⤵
            PID:3968

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • memory/3440-132-0x0000000000400000-0x00000000004A7000-memory.dmp

        Filesize

        668KB

      • memory/3440-137-0x0000000000400000-0x00000000004A7000-memory.dmp

        Filesize

        668KB