Analysis

  • max time kernel
    151s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-10-2022 09:49

General

  • Target

    550966f649e029ef5b8f7509e5387147.exe

  • Size

    824KB

  • MD5

    550966f649e029ef5b8f7509e5387147

  • SHA1

    01b15add5798939b8c3910c1d3afd815c606039e

  • SHA256

    16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

  • SHA512

    835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

  • SSDEEP

    12288:wxzG2iNVAPaK6iMcLz6EY8nSaim8i5/nRnLSO3hx5ZPvdqhbjC7zS:aK1XKv/nvHRnLSyhXqsG

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

37.0.14.206:6081

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-04LFTW

  • 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.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Executes dropped EXE 8 IoCs
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • 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
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 5 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 2 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\550966f649e029ef5b8f7509e5387147.exe
    "C:\Users\Admin\AppData\Local\Temp\550966f649e029ef5b8f7509e5387147.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3404
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hpdjztrrH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp35C5.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4680
    • C:\Users\Admin\AppData\Local\Temp\550966f649e029ef5b8f7509e5387147.exe
      "{path}"
      2⤵
        PID:2164
      • C:\Users\Admin\AppData\Local\Temp\550966f649e029ef5b8f7509e5387147.exe
        "{path}"
        2⤵
        • Checks computer location settings
        • Adds Run key to start application
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:1912
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
          3⤵
          • Checks computer location settings
          • Suspicious use of WriteProcessMemory
          PID:652
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:3152
            • C:\ProgramData\Remcos\remcos.exe
              C:\ProgramData\Remcos\remcos.exe
              5⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Suspicious use of SetThreadContext
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:208
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hpdjztrrH" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAD95.tmp"
                6⤵
                • Creates scheduled task(s)
                PID:4500
              • C:\ProgramData\Remcos\remcos.exe
                "{path}"
                6⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of SetThreadContext
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:1912
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fjrxhrxocrsdyceh"
                  7⤵
                  • Executes dropped EXE
                  PID:3448
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fjrxhrxocrsdyceh"
                  7⤵
                  • Executes dropped EXE
                  PID:5052
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fjrxhrxocrsdyceh"
                  7⤵
                  • Executes dropped EXE
                  PID:1580
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\fjrxhrxocrsdyceh"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3536
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\hmepijihqzkijqalaqf"
                  7⤵
                  • Executes dropped EXE
                  • Accesses Microsoft Outlook accounts
                  PID:416
                • C:\ProgramData\Remcos\remcos.exe
                  C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\sgkiictjehcvlwopkbszmdx"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:556

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Collection

    Data from Local System

    1
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\ProgramData\Remcos\remcos.exe
      Filesize

      824KB

      MD5

      550966f649e029ef5b8f7509e5387147

      SHA1

      01b15add5798939b8c3910c1d3afd815c606039e

      SHA256

      16b7219e20d78795eefeb5638857961342f773551898a950c7ef2245db1e0179

      SHA512

      835a59a722c36d3fd32afe65314711cf4c3f9bb764a9391e754cd7f059cda0a744c9c7ce238508097bad33e7d123156b86a09d2678fe551c71b9924f60c65270

    • C:\Users\Admin\AppData\Local\Temp\fjrxhrxocrsdyceh
      Filesize

      4KB

      MD5

      952a930b9fe70f809a67cb4e765c9448

      SHA1

      7e6c235246cc1be14d8a01ee7688a2a2471d44c9

      SHA256

      bd8156713974af3003c418302d3647fa84f62836fe83613c05e8bc40cb06a867

      SHA512

      10d12f2412fd2cb9ecf47cccd0261b17d9a3323957602c06795c4b2244306837d0a979ec6e552dc023ee81719ebcb9455bdb6f9d44f07788664994d1498452fb

    • C:\Users\Admin\AppData\Local\Temp\install.vbs
      Filesize

      386B

      MD5

      1ec6289c6fd4c2ded6b2836ed28cbeb5

      SHA1

      c4e08195e6c640eb8860acc03fda1d649b4fe070

      SHA256

      6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

      SHA512

      20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

    • C:\Users\Admin\AppData\Local\Temp\tmp35C5.tmp
      Filesize

      1KB

      MD5

      7ab8660425a5afb9c9e5a130f5ff1e33

      SHA1

      31762a4cb63f40654b38473bdb7b1bc7bf2f3bf6

      SHA256

      b6406519aa6cada361a7a2e313504ed93e1439dfae1b373545d6450d2454e713

      SHA512

      77009bed8e752a89180362033a0fa844f7daaa4652acd6c1df0b9c7b3df36ec48186b721d2c96cd1b5df284a63e67d33e5716008c2a58ecc4d085c18141205a6

    • C:\Users\Admin\AppData\Local\Temp\tmpAD95.tmp
      Filesize

      1KB

      MD5

      7ab8660425a5afb9c9e5a130f5ff1e33

      SHA1

      31762a4cb63f40654b38473bdb7b1bc7bf2f3bf6

      SHA256

      b6406519aa6cada361a7a2e313504ed93e1439dfae1b373545d6450d2454e713

      SHA512

      77009bed8e752a89180362033a0fa844f7daaa4652acd6c1df0b9c7b3df36ec48186b721d2c96cd1b5df284a63e67d33e5716008c2a58ecc4d085c18141205a6

    • memory/208-148-0x0000000000000000-mapping.dmp
    • memory/416-167-0x0000000000000000-mapping.dmp
    • memory/416-171-0x0000000000400000-0x0000000000457000-memory.dmp
      Filesize

      348KB

    • memory/556-172-0x0000000000400000-0x0000000000424000-memory.dmp
      Filesize

      144KB

    • memory/556-169-0x0000000000000000-mapping.dmp
    • memory/652-144-0x0000000000000000-mapping.dmp
    • memory/1580-163-0x0000000000000000-mapping.dmp
    • memory/1912-156-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-153-0x0000000000000000-mapping.dmp
    • memory/1912-157-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-158-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-143-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-141-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-140-0x0000000000000000-mapping.dmp
    • memory/1912-176-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-145-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1912-142-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2164-139-0x0000000000000000-mapping.dmp
    • memory/3152-147-0x0000000000000000-mapping.dmp
    • memory/3404-136-0x0000000004B70000-0x0000000004B7A000-memory.dmp
      Filesize

      40KB

    • memory/3404-132-0x0000000000060000-0x0000000000134000-memory.dmp
      Filesize

      848KB

    • memory/3404-133-0x0000000005170000-0x0000000005714000-memory.dmp
      Filesize

      5.6MB

    • memory/3404-134-0x0000000004AC0000-0x0000000004B52000-memory.dmp
      Filesize

      584KB

    • memory/3404-135-0x0000000004C60000-0x0000000004CFC000-memory.dmp
      Filesize

      624KB

    • memory/3448-159-0x0000000000000000-mapping.dmp
    • memory/3536-165-0x0000000000000000-mapping.dmp
    • memory/3536-173-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/3536-174-0x0000000000400000-0x0000000000478000-memory.dmp
      Filesize

      480KB

    • memory/4500-151-0x0000000000000000-mapping.dmp
    • memory/4680-137-0x0000000000000000-mapping.dmp
    • memory/5052-161-0x0000000000000000-mapping.dmp