Analysis

  • max time kernel
    63s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    14-04-2021 08:33

General

  • Target

    2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe

  • Size

    2.9MB

  • MD5

    21948d42c2c1e49cadea88e80dfe6880

  • SHA1

    d7f6837f76f3785eef87048c4a28c4b664f99dbd

  • SHA256

    2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7

  • SHA512

    14054453d259e53d88881a6b50061960befc06309fc14d1f557d5cb3cbc2ac7e855a805cc483915e8b5ce737c328dd03a8cfbc9a68a670e0238896009befa863

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 28 IoCs
  • HTTP links in PDF interactive object 16 IoCs

    Detects HTTP links in interactive objects within PDF files.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 7 IoCs

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

  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
    "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.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:1072
      • 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:1572
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:572
          • 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:1808
            • 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:308
              • 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:1612
                • C:\Windows\SysWOW64\svchost.exe
                  C:\Windows\SysWOW64\svchost.exe
                  8⤵
                    PID:1756
                  • C:\Windows\SysWOW64\svchost.exe
                    C:\Windows\SysWOW64\svchost.exe
                    8⤵
                      PID:676
                    • C:\Windows\SysWOW64\svchost.exe
                      C:\Windows\SysWOW64\svchost.exe
                      8⤵
                        PID:592
                      • C:\Windows\SysWOW64\svchost.exe
                        C:\Windows\SysWOW64\svchost.exe
                        8⤵
                          PID:1604
                        • C:\Windows\SysWOW64\svchost.exe
                          C:\Windows\SysWOW64\svchost.exe
                          8⤵
                            PID:752
                          • C:\Windows\SysWOW64\svchost.exe
                            C:\Windows\SysWOW64\svchost.exe
                            8⤵
                              PID:1872
                            • C:\Windows\SysWOW64\svchost.exe
                              C:\Windows\SysWOW64\svchost.exe
                              8⤵
                                PID:1992
                              • C:\Windows\SysWOW64\svchost.exe
                                C:\Windows\SysWOW64\svchost.exe
                                8⤵
                                  PID:2016
                                • C:\Windows\SysWOW64\svchost.exe
                                  C:\Windows\SysWOW64\svchost.exe
                                  8⤵
                                    PID:1800
                                  • C:\Windows\SysWOW64\svchost.exe
                                    C:\Windows\SysWOW64\svchost.exe
                                    8⤵
                                      PID:1808
                                    • C:\Windows\SysWOW64\svchost.exe
                                      C:\Windows\SysWOW64\svchost.exe
                                      8⤵
                                        PID:1244
                                      • C:\Windows\SysWOW64\svchost.exe
                                        C:\Windows\SysWOW64\svchost.exe
                                        8⤵
                                          PID:1864
                                        • 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:1608
                                            • C:\Windows\SysWOW64\svchost.exe
                                              C:\Windows\SysWOW64\svchost.exe
                                              8⤵
                                                PID:1048
                                              • C:\Windows\SysWOW64\svchost.exe
                                                C:\Windows\SysWOW64\svchost.exe
                                                8⤵
                                                  PID:1824
                                                • C:\Windows\SysWOW64\svchost.exe
                                                  C:\Windows\SysWOW64\svchost.exe
                                                  8⤵
                                                    PID:1624
                                                  • C:\Windows\SysWOW64\svchost.exe
                                                    C:\Windows\SysWOW64\svchost.exe
                                                    8⤵
                                                      PID:1580
                                                    • C:\Windows\SysWOW64\svchost.exe
                                                      C:\Windows\SysWOW64\svchost.exe
                                                      8⤵
                                                        PID:928
                                                      • C:\Windows\SysWOW64\svchost.exe
                                                        C:\Windows\SysWOW64\svchost.exe
                                                        8⤵
                                                          PID:484
                                                        • C:\Windows\SysWOW64\svchost.exe
                                                          C:\Windows\SysWOW64\svchost.exe
                                                          8⤵
                                                            PID:904
                                                          • C:\Windows\SysWOW64\svchost.exe
                                                            C:\Windows\SysWOW64\svchost.exe
                                                            8⤵
                                                              PID:300
                                                            • C:\Windows\SysWOW64\svchost.exe
                                                              C:\Windows\SysWOW64\svchost.exe
                                                              8⤵
                                                                PID:1588
                                                              • C:\Windows\SysWOW64\svchost.exe
                                                                C:\Windows\SysWOW64\svchost.exe
                                                                8⤵
                                                                  PID:108
                                                                • C:\Windows\SysWOW64\svchost.exe
                                                                  C:\Windows\SysWOW64\svchost.exe
                                                                  8⤵
                                                                    PID:1140
                                                                • 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:1704
                                                        • 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:784
                                                      • 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:1944
                                                      • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                        "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                        2⤵
                                                          PID:1744
                                                        • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                          "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                          2⤵
                                                            PID:1752
                                                          • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                            "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                            2⤵
                                                              PID:1788
                                                            • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                              "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                              2⤵
                                                                PID:1800
                                                              • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                                "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                                2⤵
                                                                  PID:1700
                                                                • C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe
                                                                  "C:\Users\Admin\AppData\Local\Temp\2ef1aedbfa1d92513e8a45015b59cdd649eb7aac25e420b18c5d564c30066ea7.exe"
                                                                  2⤵
                                                                    PID:1712
                                                                  • 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:1284
                                                                • C:\Windows\system32\taskeng.exe
                                                                  taskeng.exe {44193CFE-DA77-4985-B707-D612B9EB6B9D} S-1-5-21-2513283230-931923277-594887482-1000:MRBKYMNO\Admin:Interactive:[1]
                                                                  1⤵
                                                                    PID:944
                                                                    • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                      C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                      2⤵
                                                                      • Executes dropped EXE
                                                                      PID:1320
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:1524
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:920
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:2008
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:616
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:1284
                                                                      • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                        "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:1196
                                                                      • 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:784
                                                                    • 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:2024
                                                                      • C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                                                        "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
                                                                        3⤵
                                                                        • Executes dropped EXE
                                                                        PID:964
                                                                      • 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:1656
                                                                    • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                      C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                      2⤵
                                                                        PID:2008
                                                                        • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                          "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                          3⤵
                                                                            PID:956
                                                                          • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                            "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                            3⤵
                                                                              PID:1636
                                                                            • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                              "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                              3⤵
                                                                                PID:1728
                                                                              • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                                "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                                3⤵
                                                                                  PID:1492
                                                                                • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                                  "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                                  3⤵
                                                                                    PID:1336
                                                                                  • C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe
                                                                                    "C:\Users\Admin\AppData\Roaming\RtDCpl64\driverquery.exe"
                                                                                    3⤵
                                                                                      PID:1856
                                                                                    • 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:672
                                                                                  • C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                                                                    C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                                                                    2⤵
                                                                                      PID:1284
                                                                                      • C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
                                                                                        "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
                                                                                        3⤵
                                                                                          PID:968
                                                                                        • 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:1892

                                                                                    Network

                                                                                    MITRE ATT&CK Enterprise v6

                                                                                    Replay Monitor

                                                                                    Loading Replay Monitor...

                                                                                    Downloads

                                                                                    • memory/592-120-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB

                                                                                    • memory/676-116-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB

                                                                                    • memory/1244-152-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB

                                                                                    • memory/1572-73-0x0000000000080000-0x00000000000A0000-memory.dmp

                                                                                      Filesize

                                                                                      128KB

                                                                                    • memory/1572-84-0x0000000000080000-0x00000000000A0000-memory.dmp

                                                                                      Filesize

                                                                                      128KB

                                                                                    • memory/1612-106-0x0000000000080000-0x00000000000A0000-memory.dmp

                                                                                      Filesize

                                                                                      128KB

                                                                                    • memory/1756-108-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB

                                                                                    • memory/1756-112-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB

                                                                                    • memory/1756-60-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

                                                                                      Filesize

                                                                                      8KB

                                                                                    • memory/1756-87-0x0000000002A80000-0x0000000002A81000-memory.dmp

                                                                                      Filesize

                                                                                      4KB

                                                                                    • memory/1864-156-0x0000000000400000-0x0000000000526000-memory.dmp

                                                                                      Filesize

                                                                                      1.1MB