Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    10/08/2020, 11:40

General

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

Malware Config

Signatures

  • Loads dropped DLL 2 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of WriteProcessMemory 110 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • UPX packed file 18 IoCs

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

  • 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.

  • UAC bypass 3 TTPs
  • Suspicious behavior: EnumeratesProcesses 149 IoCs
  • Suspicious use of SetThreadContext 11 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.

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • AgentTesla Payload 7 IoCs
  • AgentTesla

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

  • Windows security bypass 2 TTPs
  • Windows security modification 2 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
    "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    PID:1480
    • C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
      "C:\Users\Admin\AppData\Local\Temp\ATT&T.exe"
      2⤵
      • System policy modification
      • Suspicious use of WriteProcessMemory
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Windows security modification
      PID:992
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
        3⤵
          PID:1028
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
          3⤵
            PID:1496
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
            3⤵
              PID:1388
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              C:\Users\Admin\AppData\Local\Temp\ATT&T.exe
              3⤵
              • Adds policy Run key to start application
              • Adds Run key to start application
              • Suspicious use of WriteProcessMemory
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetThreadContext
              • Suspicious use of SetWindowsHookEx
              PID:1796
              • C:\Windows\SysWOW64\notepad.exe
                notepad.exe
                4⤵
                  PID:1392
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr0.txt"
                  4⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:656
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr1.txt"
                  4⤵
                    PID:300
                  • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                    /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr2.txt"
                    4⤵
                      PID:1612
                    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                      /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr3.txt"
                      4⤵
                        PID:1632
                      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                        /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr3.txt"
                        4⤵
                          PID:1548
                        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                          /stext "C:\Users\Admin\AppData\Roaming\Q0V4O1A8-O5N3-X331-D1M0-A2W3Q6D8C2R6\zrbzwkjcr4.txt"
                          4⤵
                            PID:1584
                      • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
                        "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe"
                        2⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:292
                      • C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe
                        "C:\Users\Admin\AppData\Local\Temp\Fa-200000345.exe" 2 292 103865
                        2⤵
                        • Suspicious behavior: EnumeratesProcesses
                        PID:296

                    Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

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                          Downloads

                          memory/292-14-0x0000000001F12000-0x0000000001F13000-memory.dmp

                          memory/292-4-0x0000000000400000-0x00000000004C1000-memory.dmp

                          memory/292-8-0x0000000000400000-0x00000000004C1000-memory.dmp

                          memory/292-11-0x00000000004D0000-0x000000000052A000-memory.dmp

                          memory/292-7-0x0000000000400000-0x00000000004C1000-memory.dmp

                          memory/292-15-0x00000000002B0000-0x0000000000303000-memory.dmp

                          memory/300-36-0x0000000000400000-0x000000000041B000-memory.dmp

                          memory/300-34-0x0000000000400000-0x000000000041B000-memory.dmp

                          memory/656-32-0x0000000000400000-0x0000000000426000-memory.dmp

                          memory/656-33-0x0000000000400000-0x0000000000426000-memory.dmp

                          memory/656-30-0x0000000000400000-0x0000000000426000-memory.dmp

                          memory/992-28-0x0000000002430000-0x0000000002434000-memory.dmp

                          memory/992-29-0x0000000002720000-0x0000000002724000-memory.dmp

                          memory/1028-12-0x0000000000400000-0x0000000000443000-memory.dmp

                          memory/1548-45-0x0000000000400000-0x0000000000416000-memory.dmp

                          memory/1548-46-0x0000000000400000-0x0000000000416000-memory.dmp

                          memory/1548-43-0x0000000000400000-0x0000000000416000-memory.dmp

                          memory/1584-49-0x0000000000400000-0x0000000000415000-memory.dmp

                          memory/1584-47-0x0000000000400000-0x0000000000415000-memory.dmp

                          memory/1612-37-0x0000000000400000-0x0000000000459000-memory.dmp

                          memory/1612-39-0x0000000000400000-0x0000000000459000-memory.dmp

                          memory/1796-23-0x0000000000400000-0x0000000000443000-memory.dmp