Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    21/07/2020, 06:09

General

  • Target
    SBIN32000636990,pdf.scr
  • Size 1.1MB
  • Sample200721-jfhrmgjsma
  • SHA256 ece26faace5bcf7afeba359279d17aeb7f99f739fce454e964c88ebad9745bdb
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Netwire

    Netwire is a RAT with main functionalities focused password stealing and keylogging, but also includes remote control capabilities as well.

  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of WriteProcessMemory 527 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • NetWire RAT payload 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Modifies registry key 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SBIN32000636990,pdf.scr
    "C:\Users\Admin\AppData\Local\Temp\SBIN32000636990,pdf.scr" /S
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    • Adds Run key to start application
    PID:1108
    • C:\Windows\SysWOW64\TapiUnattend.exe
      "C:\Windows\System32\TapiUnattend.exe"
      2⤵
        PID:1820
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c C:\Users\Public\Natso.bat
          3⤵
            PID:2124
            • C:\Windows\SysWOW64\reg.exe
              reg delete hkcu\Environment /v windir /f
              4⤵
              • Modifies registry key
              PID:2172
            • 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:2196
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
              4⤵
                PID:2216
              • C:\Windows\SysWOW64\reg.exe
                reg delete hkcu\Environment /v windir /f
                4⤵
                • Modifies registry key
                PID:2236
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c C:\Users\Public\Runex.bat
              3⤵
                PID:2260
                • C:\Windows \System32\fodhelper.exe
                  "C:\Windows \System32\fodhelper.exe"
                  4⤵
                  • Executes dropped EXE
                  PID:2300
                • C:\Windows \System32\fodhelper.exe
                  "C:\Windows \System32\fodhelper.exe"
                  4⤵
                  • Executes dropped EXE
                  PID:2320
            • C:\Program Files (x86)\internet explorer\ieinstal.exe
              "C:\Program Files (x86)\internet explorer\ieinstal.exe"
              2⤵
              • Drops file in Program Files directory
              PID:2148

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                memory/1108-124-0x0000000050480000-0x00000000504C0000-memory.dmp

                memory/2148-131-0x0000000000400000-0x0000000000433000-memory.dmp

                memory/2148-127-0x0000000000400000-0x0000000000433000-memory.dmp