Analysis

  • max time kernel
    90s
  • max time network
    86s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    08-07-2020 10:04

General

  • Target

    Scan_sutl_Signed_.exe

  • Size

    708KB

  • MD5

    fe581cd6100e9f25ac1b69ca857bda04

  • SHA1

    80f37fdcc737c2df5716469907f744959da7015e

  • SHA256

    548bf8f685146ed7ee17c7a2aef0d62dba7be7aaed575712c5004aa26e83f1b3

  • SHA512

    81a6005648f3fee1adfb5a1f6770dcdb1be6ab7c1315407c234de54f1909f872af9fb6216468f55832646ab864f9a019abd9e1116bd1f0d31220064c88a4490e

Malware Config

Signatures

  • Suspicious use of WriteProcessMemory 537 IoCs
  • Executes dropped EXE 2 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Adds Run entry to start application 2 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Scan_sutl_Signed_.exe
    "C:\Users\Admin\AppData\Local\Temp\Scan_sutl_Signed_.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Modifies system certificate store
    • Adds Run entry to start application
    PID:1140
    • C:\Windows\SysWOW64\TapiUnattend.exe
      "C:\Windows\System32\TapiUnattend.exe"
      2⤵
        PID:1052
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c C:\Users\Public\Natso.bat
          3⤵
            PID:2408
            • C:\Windows\SysWOW64\reg.exe
              reg delete hkcu\Environment /v windir /f
              4⤵
              • Modifies registry key
              PID:2468
            • C:\Windows\SysWOW64\reg.exe
              reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\x.bat reg delete hkcu\Environment /v windir /f && REM "
              4⤵
              • Modifies registry key
              PID:2484
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
              4⤵
                PID:2496
              • C:\Windows\SysWOW64\reg.exe
                reg delete hkcu\Environment /v windir /f
                4⤵
                • Modifies registry key
                PID:2516
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c C:\Users\Public\Runex.bat
              3⤵
                PID:2632
                • C:\Windows \System32\fodhelper.exe
                  "C:\Windows \System32\fodhelper.exe"
                  4⤵
                  • Executes dropped EXE
                  PID:2680
                • C:\Windows \System32\fodhelper.exe
                  "C:\Windows \System32\fodhelper.exe"
                  4⤵
                  • Executes dropped EXE
                  PID:2700
            • C:\Program Files (x86)\internet explorer\ieinstal.exe
              "C:\Program Files (x86)\internet explorer\ieinstal.exe"
              2⤵
                PID:2380

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/1140-130-0x0000000010670000-0x00000000107C6000-memory.dmp

              Filesize

              1.3MB

            • memory/1140-124-0x0000000010410000-0x0000000010450000-memory.dmp

              Filesize

              256KB