Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-08-2024 10:47

General

  • Target

    8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe

  • Size

    1.4MB

  • MD5

    e418c8ddea38739c5fa4e6ee469ffd47

  • SHA1

    52ee59d5c7d3768056ac7809aea362e8adbeaa74

  • SHA256

    8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74

  • SHA512

    3879b2ff0821511222cd9de8dc369037df52f655c2be937c4499cd9006049ed3a671c6ccd33f0adfa499aec935e14e388449574b5f282e6f5a230993b9192128

  • SSDEEP

    12288:0EOm/U97V194bWub1V5jdJislsmq/aWPNUEFkWsnFvM1XcCDB6iCuIgWPm3A5kIo:m9B19g5V5nxsmqaWPaEXsnfCPu6BH

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:8787

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-Q4NYK2

  • 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.

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • 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.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • 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.

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Windows security modification 2 TTPs 3 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • 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 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 8 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe
    "C:\Users\Admin\AppData\Local\Temp\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:684
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\8fcca28a02a116ed9c02bfdcbe3bfb47206592110805aaeda4ad5c55aba82a74.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1272
    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      2⤵
        PID:32
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4552
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\qsmpahqasafywiaststrshws"
          3⤵
            PID:1500
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\qsmpahqasafywiaststrshws"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1960
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\amsibabcgixdzowwkvgsdmrbzsv"
            3⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:452
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe /stext "C:\Users\Admin\AppData\Local\Temp\lpfscstvtrpijdkatgsugzdsazftpl"
            3⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3360
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
          2⤵
            PID:4956

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          33e1ecefc1e12011f139b8f8a260c336

          SHA1

          709b08194e7bc0bb2123d3ee9afcbf783a6ffa7f

          SHA256

          f589bad5f7971e380707a628d1385f650dfd34da1dea2a82eef39189c8198b64

          SHA512

          aa4447c99a54eb3591d7a2517c1f58e4ab59d1b2f7af8782de070eb8bd6a5c98ea33e8e1d909b8f1a7a5dbaf7b1ed49aedaf48e988615bfcc6c2477b6fd80ade

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0w13ozp0.ucn.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

          Filesize

          4KB

          MD5

          8b8277c8f03c24d1f290dbe476e961d2

          SHA1

          2e13baf3a4b708277d550dc3dd1e0f99b131f78e

          SHA256

          9af6881f6dbffba028a7a977f4c0a43c764f840332986993ad66de7b816c2f9e

          SHA512

          7367a0236cd0d6cd731caf1ba1f4ea8f851ea1018a9c6b49db6e9d13b2aaba92767774da9169481918e4287021ff5c3a58c3143eaa5e7fe9fa88383208615948

        • memory/452-38-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/452-43-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/452-41-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/684-1-0x000001E7FC8F0000-0x000001E7FC8FC000-memory.dmp

          Filesize

          48KB

        • memory/684-0-0x00007FFB51DC3000-0x00007FFB51DC5000-memory.dmp

          Filesize

          8KB

        • memory/684-2-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/684-3-0x000001E7FEEE0000-0x000001E7FEFB0000-memory.dmp

          Filesize

          832KB

        • memory/684-29-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/1272-15-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/1272-21-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/1272-16-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/1272-6-0x00000170461E0000-0x0000017046202000-memory.dmp

          Filesize

          136KB

        • memory/1272-10-0x00007FFB51DC0000-0x00007FFB52881000-memory.dmp

          Filesize

          10.8MB

        • memory/1960-37-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1960-39-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1960-42-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/3360-45-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/3360-40-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/3360-44-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/4552-27-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-55-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4552-32-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-33-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-31-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-23-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-28-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-51-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4552-20-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-35-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-54-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4552-58-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-57-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-60-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-19-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-67-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-66-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-74-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-75-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-82-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-83-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-90-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4552-91-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB