Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-03-2023 14:45

General

  • Target

    4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921.exe

  • Size

    783KB

  • MD5

    6b04befe5957d4a3513447ae0eadbcd3

  • SHA1

    cdb2fa02b24118d0c501a4bf6479a57e9b941c3c

  • SHA256

    4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921

  • SHA512

    8754b20c2a1a762b3a945fd4c6035380ac38bb03ea5541a0dcdc2d011746ec5d37323693b0df2649aa5df91315f7f8764b0215155205c666876200c58df50b1c

  • SSDEEP

    24576:4PSxu2EYvZOwbfeT/FmkSYTU5Nb+Ca75Et:h4Yx1rW/F8D6Ca75I

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

51.75.209.245:2406

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-52YOYG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Windows security modification 2 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921.exe
    "C:\Users\Admin\AppData\Local\Temp\4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4120
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1860
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:3536
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp764E.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2648
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:228
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Sets service image path in registry
        • Checks BIOS information in registry
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Maps connected drives based on registry
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: LoadsDriver
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:3396
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1668
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
          4⤵
            PID:4172
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe
            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe"
            4⤵
              PID:4188
            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe
              "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe"
              4⤵
                PID:4412
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe
                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe"
                4⤵
                  PID:4660
                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe
                  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe"
                  4⤵
                    PID:3840
                  • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe
                    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe"
                    4⤵
                      PID:4136
                    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
                      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe"
                      4⤵
                        PID:384
                      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe
                        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe"
                        4⤵
                          PID:3340
                        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe
                          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe"
                          4⤵
                            PID:4012
                          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe
                            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe"
                            4⤵
                              PID:2068
                            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                              "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe"
                              4⤵
                                PID:2236
                              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe
                                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe"
                                4⤵
                                  PID:3972
                                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe
                                  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe"
                                  4⤵
                                    PID:5044
                                  • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
                                    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"
                                    4⤵
                                      PID:1352
                                    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe
                                      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe"
                                      4⤵
                                        PID:4824
                                      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe
                                        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe"
                                        4⤵
                                          PID:2748
                                        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe
                                          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe"
                                          4⤵
                                            PID:4124
                                          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ComSvcConfig.exe
                                            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ComSvcConfig.exe"
                                            4⤵
                                              PID:1324
                                            • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
                                              "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe"
                                              4⤵
                                                PID:2512
                                              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe
                                                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe"
                                                4⤵
                                                  PID:1072
                                                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe
                                                  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe"
                                                  4⤵
                                                    PID:3768
                                                  • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe
                                                    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe"
                                                    4⤵
                                                      PID:1876
                                                    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe
                                                      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe"
                                                      4⤵
                                                        PID:1972
                                                      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe
                                                        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe"
                                                        4⤵
                                                          PID:3028
                                                        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe
                                                          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe"
                                                          4⤵
                                                            PID:632
                                                          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe
                                                            "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe"
                                                            4⤵
                                                            • Suspicious use of SetWindowsHookEx
                                                            PID:736

                                                    Network

                                                    MITRE ATT&CK Enterprise v6

                                                    Replay Monitor

                                                    Loading Replay Monitor...

                                                    Downloads

                                                    • C:\ProgramData\remcos\logs.dat

                                                      Filesize

                                                      144B

                                                      MD5

                                                      08e759f73d2c5cc1a3ef74732dc05b13

                                                      SHA1

                                                      45a57b89097c687982be962f4ce048e3fb93f617

                                                      SHA256

                                                      63445576764d04b7e8cc0c25acb24010c288fa6ea82438bc3a1620fd5425c76f

                                                      SHA512

                                                      242f17aad2b61195f828f60c29b816571f3cef1d2070afbe5b7ba61afe4c6da0c08c92f54b6cad5547712ab7a59aff1857037874f30164e4f10038d5bcedaa2b

                                                    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fgftmesm.mff.ps1

                                                      Filesize

                                                      60B

                                                      MD5

                                                      d17fe0a3f47be24a6453e9ef58c94641

                                                      SHA1

                                                      6ab83620379fc69f80c0242105ddffd7d98d5d9d

                                                      SHA256

                                                      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                                                      SHA512

                                                      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

                                                    • C:\Users\Admin\AppData\Local\Temp\tmp764E.tmp.bat

                                                      Filesize

                                                      151B

                                                      MD5

                                                      01febb87d0c45bf8e2d0e623878bf10d

                                                      SHA1

                                                      f4acad05fcd2e00db5bd189a3fbb53e7db68a7a9

                                                      SHA256

                                                      3dfdb36a8748af537109be229b2a7412f889451877ea35b821fca0877ae60a9c

                                                      SHA512

                                                      0ccde94edd2aa9215648c5a1bab52b14537dbf36bc0fd85ca875294adb8380e2de2ea01cd1f7b9bfb0e5a52d91340ec922ea4e298c67f36cf9bb668ac934e868

                                                    • C:\Users\Admin\AppData\Roaming\svchost.exe

                                                      Filesize

                                                      783KB

                                                      MD5

                                                      6b04befe5957d4a3513447ae0eadbcd3

                                                      SHA1

                                                      cdb2fa02b24118d0c501a4bf6479a57e9b941c3c

                                                      SHA256

                                                      4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921

                                                      SHA512

                                                      8754b20c2a1a762b3a945fd4c6035380ac38bb03ea5541a0dcdc2d011746ec5d37323693b0df2649aa5df91315f7f8764b0215155205c666876200c58df50b1c

                                                    • C:\Users\Admin\AppData\Roaming\svchost.exe

                                                      Filesize

                                                      783KB

                                                      MD5

                                                      6b04befe5957d4a3513447ae0eadbcd3

                                                      SHA1

                                                      cdb2fa02b24118d0c501a4bf6479a57e9b941c3c

                                                      SHA256

                                                      4b54075f2a8e292530e7741ed3e2da8f0ba10a3936fe3642e651e7d6fbb10921

                                                      SHA512

                                                      8754b20c2a1a762b3a945fd4c6035380ac38bb03ea5541a0dcdc2d011746ec5d37323693b0df2649aa5df91315f7f8764b0215155205c666876200c58df50b1c

                                                    • memory/736-165-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-171-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-154-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-156-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-159-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-160-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-162-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-163-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-164-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-204-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-168-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-203-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-172-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-198-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-177-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-178-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-184-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-185-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-190-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-191-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/736-196-0x0000000000400000-0x000000000047F000-memory.dmp

                                                      Filesize

                                                      508KB

                                                    • memory/1668-144-0x0000015F4A460000-0x0000015F4A482000-memory.dmp

                                                      Filesize

                                                      136KB

                                                    • memory/4120-134-0x000002C4AE100000-0x000002C4AE110000-memory.dmp

                                                      Filesize

                                                      64KB

                                                    • memory/4120-133-0x000002C4ADCF0000-0x000002C4ADDB6000-memory.dmp

                                                      Filesize

                                                      792KB