Analysis

  • max time kernel
    26s
  • max time network
    14s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    09/11/2020, 20:49

General

  • Target
    fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
  • Size 2.9MB
  • Sample201109-ghjpyvdfhs
  • SHA256 fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Family
  • remcos

C2
  • daya4659.ddns.net:8282

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Executes dropped EXE 13 IoCs
  • Loads dropped DLL 6 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 10 IoCs
  • Creates scheduled task(s) 1 TTPs 5 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 191 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
    "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1756
    • C:\Users\Admin\AppData\Roaming\remcos_agent_Protected.exe
      "C:\Users\Admin\AppData\Roaming\remcos_agent_Protected.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Users\Admin\AppData\Roaming\remcos_agent_Protected.exe
        "C:\Users\Admin\AppData\Roaming\remcos_agent_Protected.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:1704
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1336
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
            5⤵
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:664
            • C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
              C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1180
              • C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
                "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
                7⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of SetThreadContext
                • Suspicious use of SetWindowsHookEx
                PID:640
                • C:\Windows\SysWOW64\svchost.exe
                  C:\Windows\SysWOW64\svchost.exe
                  8⤵
                    PID:952
                  • C:\Windows\SysWOW64\svchost.exe
                    C:\Windows\SysWOW64\svchost.exe
                    8⤵
                      PID:1996
                    • C:\Windows\SysWOW64\svchost.exe
                      C:\Windows\SysWOW64\svchost.exe
                      8⤵
                        PID:1680
                      • C:\Windows\SysWOW64\svchost.exe
                        C:\Windows\SysWOW64\svchost.exe
                        8⤵
                          PID:1424
                        • C:\Windows\SysWOW64\svchost.exe
                          C:\Windows\SysWOW64\svchost.exe
                          8⤵
                            PID:316
                          • C:\Windows\SysWOW64\svchost.exe
                            C:\Windows\SysWOW64\svchost.exe
                            8⤵
                              PID:1304
                            • C:\Windows\SysWOW64\svchost.exe
                              C:\Windows\SysWOW64\svchost.exe
                              8⤵
                                PID:1428
                            • C:\Windows\SysWOW64\schtasks.exe
                              "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
                              7⤵
                              • Creates scheduled task(s)
                              PID:1168
                    • C:\Windows\SysWOW64\schtasks.exe
                      "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
                      3⤵
                      • Creates scheduled task(s)
                      PID:1532
                  • C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
                    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\medical-application-form.pdf"
                    2⤵
                    • Suspicious use of SetWindowsHookEx
                    PID:2032
                  • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                    "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                    2⤵
                      PID:1124
                    • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                      "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                      2⤵
                        PID:2040
                      • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                        "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                        2⤵
                          PID:904
                        • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                          "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                          2⤵
                            PID:1308
                          • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                            "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                            2⤵
                              PID:1980
                            • C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe
                              "C:\Users\Admin\AppData\Local\Temp\fdbf2db23a47bf68de9535195e4dcdd74cf899b9cb04937650aa246859a65463.exe"
                              2⤵
                                PID:2016
                              • C:\Windows\SysWOW64\schtasks.exe
                                "C:\Windows\SysWOW64\schtasks.exe" /create /tn WWAHost /tr "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe" /sc minute /mo 1 /F
                                2⤵
                                • Creates scheduled task(s)
                                PID:1152
                            • C:\Windows\system32\taskeng.exe
                              taskeng.exe {86428613-8EB0-433C-8EE1-9588190C7995} S-1-5-21-3825035466-2522850611-591511364-1000:EIDQHRRL\Admin:Interactive:[1]
                              1⤵
                                PID:1320
                                • C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                  C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                  2⤵
                                  • Executes dropped EXE
                                  • Suspicious use of SetThreadContext
                                  PID:800
                                  • C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                    "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:940
                                  • C:\Windows\SysWOW64\schtasks.exe
                                    "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
                                    3⤵
                                    • Creates scheduled task(s)
                                    PID:1604
                                • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                  C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                  2⤵
                                  • Executes dropped EXE
                                  PID:364
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:1180
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:1748
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:1824
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:2012
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:1608
                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                    3⤵
                                    • Executes dropped EXE
                                    PID:1612
                                  • C:\Windows\SysWOW64\schtasks.exe
                                    "C:\Windows\SysWOW64\schtasks.exe" /create /tn WWAHost /tr "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe" /sc minute /mo 1 /F
                                    3⤵
                                    • Creates scheduled task(s)
                                    PID:1296

                              Network

                                    MITRE ATT&CK Enterprise v6

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                                    Downloads

                                    memory/460-71-0x00000000000C0000-0x00000000000E0000-memory.dmp

                                    memory/952-30-0x0000000000400000-0x0000000000526000-memory.dmp

                                    memory/952-27-0x0000000000400000-0x0000000000526000-memory.dmp

                                    memory/1336-18-0x00000000027C0000-0x00000000027C4000-memory.dmp

                                    memory/1680-36-0x0000000000400000-0x0000000000526000-memory.dmp

                                    memory/1704-10-0x0000000000080000-0x00000000000A0000-memory.dmp

                                    memory/1996-33-0x0000000000400000-0x0000000000526000-memory.dmp