Analysis

  • max time kernel
    149s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-12-2024 02:30

General

  • Target

    4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe

  • Size

    856KB

  • MD5

    b7b504ea022610fe69940fd54fd2bc27

  • SHA1

    8cb39de97c36eb8328436ffe21be24742925e652

  • SHA256

    4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87

  • SHA512

    4f38f6ff589cb607c2cbd5be4be78c5dffe9f03723ec9c9eee9c606b9a8143ade83dbd3c2639f2401ee47232b899fb9dbe9dde7fea5196c31483d2b552f4b313

  • SSDEEP

    24576:KdeRzboLmkwWQ6Q2l/4SPTIXkORnLeV35YryHC:CyO37l5TkzRLePYryHC

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:8787

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-R1T905

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • 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

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 3 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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
    "C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2576
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
      2⤵
      • Drops startup file
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2112
    • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
      "C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2296
      • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
        C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\ofbipxqsimylhmxwjpsvvmybwvjiyhjn"
        3⤵
          PID:2708
        • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
          C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\ofbipxqsimylhmxwjpsvvmybwvjiyhjn"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2752
        • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
          C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\zhgb"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:2172
        • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
          C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\bbmujam"
          3⤵
            PID:2496
          • C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe
            C:\Users\Admin\AppData\Local\Temp\4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87.exe /stext "C:\Users\Admin\AppData\Local\Temp\bbmujam"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:1424

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\logs.dat

        Filesize

        124B

        MD5

        3b9d80511f10764f287409c5d8468242

        SHA1

        29988564e2302470ea22e558ae837547c2d6cf1b

        SHA256

        c175db141a2041e7cd1600e655048e54f6cf743cec504c61bd078670b63786be

        SHA512

        9ff2fdca36458836a9cd6f26f7db70002e8dfdd278280c1260bd8fad187ef2d196de675e686d8202e39392a30f3d00d977c49ee24f23c699c75237e2d0ff223f

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

        Filesize

        2B

        MD5

        f3b25701fe362ec84616a93a45ce9998

        SHA1

        d62636d8caec13f04e28442a0a6fa1afeb024bbb

        SHA256

        b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

        SHA512

        98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

      • memory/1424-47-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/1424-48-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/1424-46-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/2112-8-0x000000006EE10000-0x000000006F3BB000-memory.dmp

        Filesize

        5.7MB

      • memory/2112-9-0x000000006EE10000-0x000000006F3BB000-memory.dmp

        Filesize

        5.7MB

      • memory/2112-10-0x000000006EE10000-0x000000006F3BB000-memory.dmp

        Filesize

        5.7MB

      • memory/2112-12-0x000000006EE10000-0x000000006F3BB000-memory.dmp

        Filesize

        5.7MB

      • memory/2112-7-0x000000006EE10000-0x000000006F3BB000-memory.dmp

        Filesize

        5.7MB

      • memory/2112-6-0x000000006EE11000-0x000000006EE12000-memory.dmp

        Filesize

        4KB

      • memory/2172-40-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2172-42-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2172-44-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/2296-35-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-14-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-19-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-17-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-16-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-23-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2296-15-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-96-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-32-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-31-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-33-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-95-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-36-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-26-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-88-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-29-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-30-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-20-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-87-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-79-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-25-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-80-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-72-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-71-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-63-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-57-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/2296-60-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/2296-61-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/2296-62-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2296-64-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/2576-56-0x0000000074020000-0x000000007470E000-memory.dmp

        Filesize

        6.9MB

      • memory/2576-1-0x00000000012B0000-0x000000000138C000-memory.dmp

        Filesize

        880KB

      • memory/2576-55-0x000000007402E000-0x000000007402F000-memory.dmp

        Filesize

        4KB

      • memory/2576-2-0x0000000004C10000-0x0000000004CBE000-memory.dmp

        Filesize

        696KB

      • memory/2576-3-0x0000000074020000-0x000000007470E000-memory.dmp

        Filesize

        6.9MB

      • memory/2576-0-0x000000007402E000-0x000000007402F000-memory.dmp

        Filesize

        4KB

      • memory/2576-13-0x0000000000920000-0x0000000000928000-memory.dmp

        Filesize

        32KB

      • memory/2752-38-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2752-41-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/2752-43-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB