Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 01:11

General

  • Target

    Bordereau de versement.exe

  • Size

    849KB

  • MD5

    90b3d027e4e43d4c867f04b4c89c8589

  • SHA1

    c23bed92fbe828fa9699115d15e0296ba18ca561

  • SHA256

    bac49390230b8d170af75761bf64a3e877b570bea0c9b5ba73dd54a7fab5c351

  • SHA512

    c5ad505038b66cc8388cfd8d558734663ab3a01e648fe91a25f3103e0493d78e42d03d7090a6738fbf0acda474511be9af57b0416618df3cfb089bb326b82fe4

  • SSDEEP

    24576:wWnj81akfCViEDhkD+08jwUNH7wMOYfcuLTJdHRa:wWg1akf8iehgzIHJ7wMODIVdHRa

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:59321

nnamoo.duckdns.org:59321

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-41EVS0

  • 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.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
    "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2220
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HssCNlssJ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2776
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HssCNlssJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE5EC.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2828
    • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
      "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe"
      2⤵
        PID:2924
      • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
        "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:1632
        • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
          "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\nhyfudkp"
          3⤵
            PID:2664
          • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
            "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\nhyfudkp"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:2368
          • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
            "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xjmpvwvrbowm"
            3⤵
              PID:1300
            • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
              "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xjmpvwvrbowm"
              3⤵
                PID:1908
              • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
                "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xjmpvwvrbowm"
                3⤵
                  PID:2604
                • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
                  "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xjmpvwvrbowm"
                  3⤵
                    PID:1792
                  • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
                    "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\xjmpvwvrbowm"
                    3⤵
                    • Accesses Microsoft Outlook accounts
                    • System Location Discovery: System Language Discovery
                    PID:920
                  • C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe
                    "C:\Users\Admin\AppData\Local\Temp\Bordereau de versement.exe" /stext "C:\Users\Admin\AppData\Local\Temp\adriwogkpwoznjc"
                    3⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious use of AdjustPrivilegeToken
                    PID:404

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Admin\AppData\Local\Temp\nhyfudkp

                Filesize

                2B

                MD5

                f3b25701fe362ec84616a93a45ce9998

                SHA1

                d62636d8caec13f04e28442a0a6fa1afeb024bbb

                SHA256

                b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                SHA512

                98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

              • C:\Users\Admin\AppData\Local\Temp\tmpE5EC.tmp

                Filesize

                1KB

                MD5

                dd96feea584a05538e60f574313e1ec7

                SHA1

                de187335ebae430d8b2bde33d6881bcdceaba913

                SHA256

                8867043265277d97ff357937b60c4ff5a7c7e95ea9e423b0f6f67ebbb172805d

                SHA512

                13184cce45de470f81eb1da384eab814a8e3e5f5b2b44de34481936ec8a4a0b1188da6a71b772ff7a6800d16ab5c6d8e5a1d991f8552e8c09c0b5b4f51cf6653

              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\8Y4BKC43OFK86QNP13R6.temp

                Filesize

                7KB

                MD5

                cc17947b4c5b5db138e1b2b81d742a5f

                SHA1

                5dd371209e188e66d5587a1ea04938e0a87158f2

                SHA256

                a7bff2dc7187540bb52d1145ff90770d08c4b67431894d2ef6485bf1ca85ab12

                SHA512

                aa090208c2581f68dc0f1a9d70388f7762433a06fc68a997aecfd77a9f47dc2ad09e7ddb2c2c9142bbfcc2210fc48f8cd6672c31aff5b03e5fa48f0e0f226195

              • memory/404-64-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/404-65-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/404-62-0x0000000000400000-0x0000000000424000-memory.dmp

                Filesize

                144KB

              • memory/920-66-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/920-63-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/920-60-0x0000000000400000-0x0000000000457000-memory.dmp

                Filesize

                348KB

              • memory/1632-50-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-74-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-31-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-29-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-27-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-24-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-21-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-19-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-86-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-85-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-83-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-84-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-82-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-81-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-41-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-42-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-43-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-44-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-45-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-48-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-49-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

                Filesize

                4KB

              • memory/1632-51-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-52-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-53-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-54-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-80-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-37-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-38-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-79-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-78-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-77-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-76-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-39-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-36-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-25-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-72-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-33-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-73-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/1632-75-0x0000000000400000-0x000000000047F000-memory.dmp

                Filesize

                508KB

              • memory/2140-0-0x000000007423E000-0x000000007423F000-memory.dmp

                Filesize

                4KB

              • memory/2140-1-0x0000000000220000-0x00000000002FA000-memory.dmp

                Filesize

                872KB

              • memory/2140-40-0x0000000074230000-0x000000007491E000-memory.dmp

                Filesize

                6.9MB

              • memory/2140-6-0x0000000005050000-0x000000000510E000-memory.dmp

                Filesize

                760KB

              • memory/2140-5-0x0000000074230000-0x000000007491E000-memory.dmp

                Filesize

                6.9MB

              • memory/2140-4-0x000000007423E000-0x000000007423F000-memory.dmp

                Filesize

                4KB

              • memory/2140-3-0x0000000000600000-0x000000000060E000-memory.dmp

                Filesize

                56KB

              • memory/2140-2-0x0000000074230000-0x000000007491E000-memory.dmp

                Filesize

                6.9MB

              • memory/2368-56-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2368-58-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB

              • memory/2368-57-0x0000000000400000-0x0000000000478000-memory.dmp

                Filesize

                480KB