Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    25-07-2024 17:04

General

  • Target

    IAENMAIL-A4-240717-0830-000090912_PDF.exe

  • Size

    2.2MB

  • MD5

    6c3b88c4675ff6cad62702925a3390f1

  • SHA1

    d7c0fdc2b3b92df96b5bcd7a390aa7312df086a5

  • SHA256

    a8e25a2520c09dd71e17afbde126f58514921c6d967a786bde096fafda08701a

  • SHA512

    ee611d1b240a25a02d8ea9ecca3deb943da34dfcb03a38c2e5d8b40a2cea60d4d4446f968b4af6dc6c9f21bd951b3023e16939ebd1fe0a3fd0867f6a0d143e4a

  • SSDEEP

    49152:qB1BRf3rOSzOzrFNj8e1KbWF8K7Vk3SZTH4OWOEkw/R8jDYWg16pb67Wy/Zz:aaRrFCI4v7p

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

103.198.26.25:96

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-IPUJM4

  • 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.

  • 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 1 IoCs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 62 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\IAENMAIL-A4-240717-0830-000090912_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\IAENMAIL-A4-240717-0830-000090912_PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
      C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath $env:UserProfile
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2128
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
      2⤵
        PID:2580
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
        2⤵
          PID:2780
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
          2⤵
            PID:2632
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
            2⤵
              PID:2684
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
              2⤵
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of WriteProcessMemory
              PID:2712
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe /stext "C:\Users\Admin\AppData\Local\Temp\fhathikfaaibwlipzzjazkzgvnfiemf"
                3⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                PID:2508
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe /stext "C:\Users\Admin\AppData\Local\Temp\qbnmabvzoiaghzwtrkdbkxtpvcprfxekdt"
                3⤵
                • Accesses Microsoft Outlook accounts
                • System Location Discovery: System Language Discovery
                PID:2044
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe /stext "C:\Users\Admin\AppData\Local\Temp\sdtwbt"
                3⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of AdjustPrivilegeToken
                PID:2412

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            2B

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

          • memory/2044-29-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/2044-33-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/2044-31-0x0000000000400000-0x0000000000462000-memory.dmp

            Filesize

            392KB

          • memory/2128-7-0x000007FEF4F60000-0x000007FEF58FD000-memory.dmp

            Filesize

            9.6MB

          • memory/2128-4-0x000007FEF521E000-0x000007FEF521F000-memory.dmp

            Filesize

            4KB

          • memory/2128-11-0x000007FEF4F60000-0x000007FEF58FD000-memory.dmp

            Filesize

            9.6MB

          • memory/2128-10-0x000007FEF4F60000-0x000007FEF58FD000-memory.dmp

            Filesize

            9.6MB

          • memory/2128-49-0x000007FEF4F60000-0x000007FEF58FD000-memory.dmp

            Filesize

            9.6MB

          • memory/2128-8-0x00000000029A4000-0x00000000029A7000-memory.dmp

            Filesize

            12KB

          • memory/2128-5-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

            Filesize

            2.9MB

          • memory/2128-6-0x0000000002970000-0x0000000002978000-memory.dmp

            Filesize

            32KB

          • memory/2128-9-0x00000000029AB000-0x0000000002A12000-memory.dmp

            Filesize

            412KB

          • memory/2412-36-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2412-35-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2412-37-0x0000000000400000-0x0000000000424000-memory.dmp

            Filesize

            144KB

          • memory/2508-30-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/2508-32-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/2508-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2508-27-0x0000000000400000-0x0000000000478000-memory.dmp

            Filesize

            480KB

          • memory/2712-17-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-47-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2712-25-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-23-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-21-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-20-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-19-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-18-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-16-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-15-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-14-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-43-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2712-48-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-24-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-46-0x0000000010000000-0x0000000010019000-memory.dmp

            Filesize

            100KB

          • memory/2712-12-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-50-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-51-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-52-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-54-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-53-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-55-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-56-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-57-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB

          • memory/2712-58-0x0000000000400000-0x0000000000482000-memory.dmp

            Filesize

            520KB