Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    16-08-2024 19:12

General

  • Target

    FTE98767800000.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
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

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

  • Uses the VBS compiler for execution 1 TTPs
  • 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.

  • Runs regedit.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FTE98767800000.exe
    "C:\Users\Admin\AppData\Local\Temp\FTE98767800000.exe"
    1⤵
    • UAC bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2164
    • 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\FTE98767800000.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2824
    • C:\Windows\regedit.exe
      "C:\Windows\regedit.exe"
      2⤵
      • Runs regedit.exe
      PID:2980
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
      2⤵
        PID:2700
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        2⤵
          PID:2752
        • C:\Windows\System32\svchost.exe
          "C:\Windows\System32\svchost.exe"
          2⤵
            PID:3064
          • C:\Windows\System32\notepad.exe
            "C:\Windows\System32\notepad.exe"
            2⤵
              PID:1172
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
              2⤵
                PID:3048
              • C:\Program Files (x86)\Windows Mail\wab.exe
                "C:\Program Files (x86)\Windows Mail\wab.exe"
                2⤵
                • Suspicious use of SetThreadContext
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of SetWindowsHookEx
                PID:2720
                • C:\Program Files (x86)\Windows Mail\wab.exe
                  "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\wxjbaydfslgjglavymjosvgjflhehncd"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious behavior: EnumeratesProcesses
                  PID:2308
                • C:\Program Files (x86)\Windows Mail\wab.exe
                  "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\hawtb"
                  3⤵
                  • Accesses Microsoft Outlook accounts
                  • System Location Discovery: System Language Discovery
                  PID:896
                • C:\Program Files (x86)\Windows Mail\wab.exe
                  "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\rucmcjza"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2568
              • C:\Program Files (x86)\Windows Mail\wab.exe
                "C:\Program Files (x86)\Windows Mail\wab.exe"
                2⤵
                  PID:2748

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\ProgramData\remcos\logs.dat

                Filesize

                230B

                MD5

                43d88a565c5333f28eeb5db12a5b7308

                SHA1

                84f3483d6006c04677cc960628af167d4c47f141

                SHA256

                d1751e216f780cccb5c738a6756141d3855ff22b6e0a4520be7477aabc0b9e8a

                SHA512

                1a1730785ae096e31391909cd5030370330fff3c4a281732394e099c42c284a9977aa56d58e83f4da8a165302c3babbac2cc32b657886a865bb6e012db416a4d

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

                Filesize

                2B

                MD5

                f3b25701fe362ec84616a93a45ce9998

                SHA1

                d62636d8caec13f04e28442a0a6fa1afeb024bbb

                SHA256

                b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                SHA512

                98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

              • memory/2164-1-0x0000000000970000-0x000000000097C000-memory.dmp

                Filesize

                48KB

              • memory/2164-2-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

                Filesize

                9.9MB

              • memory/2164-3-0x000000001A800000-0x000000001A8D0000-memory.dmp

                Filesize

                832KB

              • memory/2164-0-0x000007FEF6023000-0x000007FEF6024000-memory.dmp

                Filesize

                4KB

              • memory/2164-109-0x000007FEF6020000-0x000007FEF6A0C000-memory.dmp

                Filesize

                9.9MB

              • memory/2824-24-0x000000001B820000-0x000000001BB02000-memory.dmp

                Filesize

                2.9MB

              • memory/2824-25-0x0000000002770000-0x0000000002778000-memory.dmp

                Filesize

                32KB

              • memory/2980-4-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-6-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-18-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-8-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-10-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-12-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-16-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB

              • memory/2980-14-0x0000000000400000-0x0000000000482000-memory.dmp

                Filesize

                520KB