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Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    07/07/2020, 09:52

General

  • Target

    stud.exe

  • Size

    755KB

  • MD5

    6044900d66376321ad6f237d1b465ecc

  • SHA1

    0147db0583256b648680a54573b288f9167cca67

  • SHA256

    9099123ab27c467c09e2483339756820e29e6d8cd3d0346305d3873902e4af65

  • SHA512

    03fdca6dfdccc2a17abbfb42adfb5a89a5e2a32b9929efde0689da17967db406dd55f057162d2324605254c354130c8b73077fa9bc4bf23053878ffc5f239076

Score
8/10

Malware Config

Signatures

  • Drops file in Program Files directory 1 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • Adds Run entry to policy start application 2 TTPs 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SendNotifyMessage
    PID:3008
    • C:\Users\Admin\AppData\Local\Temp\stud.exe
      "C:\Users\Admin\AppData\Local\Temp\stud.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      PID:3236
      • C:\Users\Admin\AppData\Local\Temp\stud.exe
        "C:\Users\Admin\AppData\Local\Temp\stud.exe"
        3⤵
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious behavior: EnumeratesProcesses
        PID:3360
    • C:\Windows\SysWOW64\raserver.exe
      "C:\Windows\SysWOW64\raserver.exe"
      2⤵
      • Drops file in Program Files directory
      • System policy modification
      • Adds Run entry to policy start application
      • Modifies Internet Explorer settings
      • Suspicious use of WriteProcessMemory
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious behavior: EnumeratesProcesses
      PID:3848
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\stud.exe"
        3⤵
          PID:2892
        • C:\Windows\SysWOW64\cmd.exe
          /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
          3⤵
            PID:1776
          • C:\Program Files\Mozilla Firefox\Firefox.exe
            "C:\Program Files\Mozilla Firefox\Firefox.exe"
            3⤵
              PID:3172

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/3172-12-0x00007FF7439B0000-0x00007FF743A43000-memory.dmp

          Filesize

          588KB

        • memory/3172-11-0x00007FF7439B0000-0x00007FF743A43000-memory.dmp

          Filesize

          588KB

        • memory/3172-13-0x00007FF7439B0000-0x00007FF743A43000-memory.dmp

          Filesize

          588KB

        • memory/3360-0-0x0000000000400000-0x000000000042D000-memory.dmp

          Filesize

          180KB

        • memory/3848-9-0x0000000005EA0000-0x0000000005F57000-memory.dmp

          Filesize

          732KB

        • memory/3848-6-0x0000000005DE0000-0x0000000005ED7000-memory.dmp

          Filesize

          988KB

        • memory/3848-4-0x0000000001330000-0x000000000134F000-memory.dmp

          Filesize

          124KB

        • memory/3848-3-0x0000000001330000-0x000000000134F000-memory.dmp

          Filesize

          124KB