Analysis

  • max time kernel
    140s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    10/08/2020, 11:40

General

  • Target
    Fa-200000345.exe
  • Size 974KB
  • Sample200810-g2efb1a2s6
  • SHA256 13c555d2bc29bc384b7c496c0aefadfbe38d7b415e11c43bdbcfdf702062d1f3
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    mail.salsabile.com

  • Port

    587

  • Password

    @SALSA@2015

Signatures

  • Windows security bypass 2 TTPs
  • AgentTesla Payload 5 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Windows security modification 2 TTPs 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • UPX packed file 18 IoCs

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

  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 232 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • UAC bypass 3 TTPs
  • System policy modification 1 TTPs 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Suspicious use of WriteProcessMemory 64 IoCs
  • Suspicious use of SetThreadContext 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
    "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    PID:976
    • C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
      "C:\Users\Admin\AppData\Local\Temp\ATT&T.exe"
      2⤵
      • Checks whether UAC is enabled
      • Windows security modification
      • Suspicious use of SetWindowsHookEx
      • Suspicious behavior: EnumeratesProcesses
      • Executes dropped EXE
      • System policy modification
      • Suspicious use of WriteProcessMemory
      • Suspicious use of SetThreadContext
      PID:3860
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
        3⤵
        • Suspicious use of SetWindowsHookEx
        • Adds policy Run key to start application
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        PID:3612
        • C:\Windows\SysWOW64\notepad.exe
          notepad.exe
          4⤵
            PID:1976
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\nimqxxrrn0.txt"
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3756
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\nimqxxrrn1.txt"
            4⤵
              PID:4056
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\nimqxxrrn2.txt"
              4⤵
                PID:3868
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\nimqxxrrn3.txt"
                4⤵
                  PID:3536
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\nimqxxrrn4.txt"
                  4⤵
                    PID:3668
              • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
                "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe"
                2⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:3900
              • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
                "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe" 2 3900 62640
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:3956

            Network

                  MITRE ATT&CK Enterprise v6

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                  Downloads

                  memory/3536-33-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/3536-36-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/3536-35-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/3612-11-0x0000000000400000-0x0000000000443000-memory.dmp

                  memory/3612-13-0x0000000000400000-0x0000000000443000-memory.dmp

                  memory/3668-37-0x0000000000400000-0x0000000000415000-memory.dmp

                  memory/3668-39-0x0000000000400000-0x0000000000415000-memory.dmp

                  memory/3756-24-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/3756-25-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/3756-22-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/3868-31-0x0000000000400000-0x0000000000459000-memory.dmp

                  memory/3868-29-0x0000000000400000-0x0000000000459000-memory.dmp

                  memory/3900-8-0x0000000000400000-0x00000000004C1000-memory.dmp

                  memory/3900-14-0x0000000000692000-0x0000000000693000-memory.dmp

                  memory/3900-10-0x0000000000A70000-0x0000000000ACA000-memory.dmp

                  memory/3900-6-0x0000000000400000-0x00000000004C1000-memory.dmp

                  memory/3900-3-0x0000000000400000-0x00000000004C1000-memory.dmp

                  memory/4056-28-0x0000000000400000-0x000000000041B000-memory.dmp

                  memory/4056-26-0x0000000000400000-0x000000000041B000-memory.dmp