Analysis

  • max time kernel
    299s
  • max time network
    291s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    10-01-2025 13:45

General

  • Target

    10012025_1345_10012025_2025-10-01.rtf

  • Size

    468KB

  • MD5

    637a0dca5ff05243ce500f663899f348

  • SHA1

    0a8dc1c0ebaa9a6543b49bc2c6546c48a89a92c8

  • SHA256

    9847787ffbd118169e46e25faf174e06acda93a9bd3a05253e395248a14c90e4

  • SHA512

    84eb867a3a83748deb213d485c5e2b7d2c2476b1bd34a59066a6930a9dc665e425675dd152cdbbbd94553af9c0e69149b12d5330bb8f7e775285298f876abc8c

  • SSDEEP

    6144:bwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAi:5Tpy

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

www.kposlifestyle.design:2404

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

    edefdefffff

  • mouse_option

    false

  • mutex

    Rmc-OH1QS4

  • 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

  • Blocklisted process makes network request 2 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.

  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 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
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

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

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\10012025_1345_10012025_2025-10-01.rtf"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:2080
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:2968
      • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe
        "C:\Users\Admin\AppData\Roaming\firefoxplugni.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\firefoxplugni.exe"
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2776
        • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe
          "C:\Users\Admin\AppData\Roaming\firefoxplugni.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2704
          • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe
            C:\Users\Admin\AppData\Roaming\firefoxplugni.exe /stext "C:\Users\Admin\AppData\Local\Temp\myfphlsjtod"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1756
          • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe
            C:\Users\Admin\AppData\Roaming\firefoxplugni.exe /stext "C:\Users\Admin\AppData\Local\Temp\wakaiddlhwvnbf"
            4⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:2464
          • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe
            C:\Users\Admin\AppData\Roaming\firefoxplugni.exe /stext "C:\Users\Admin\AppData\Local\Temp\gvpsjwoevenamlfcd"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2272

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\edefdefffff\logs.dat

      Filesize

      264B

      MD5

      73ccd0cea792725b064f7a512e7f92ad

      SHA1

      10e8c6bb1e77f9455c1d23b21b92ed9432d0d4aa

      SHA256

      0cf5c522398809756803be74c55c0fcabc92b0a5beb232e8b419976eea9770f3

      SHA512

      0b5b9b8cc9523c2a8fd49b6de5e14f939b5a03aabc7b9553b77c500bf2168db289c23201766cd12bd93c9164035880d2178f4009f6d67c9055e472172ffdb8aa

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

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Roaming\firefoxplugni.exe

      Filesize

      958KB

      MD5

      c3a038325cbfffb65baa02b02f1eb72c

      SHA1

      430d5b577794b6732b46372361d7a7a7670a58ae

      SHA256

      4f8ffd67641fbb7206cc5b4fdfeed8839dc7a825e28c822e9d95327be9d55d27

      SHA512

      46871612fbd25f139269b7f65b6ae24440f480ee8d3b29525c1f58cb9a1e2b72642b931512d7f1da714415ae5949b4840a8bea217f2f7bb3c39155009dcb61ac

    • memory/1756-66-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1756-71-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1756-77-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2272-79-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2272-78-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2272-75-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2464-69-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2464-72-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2464-73-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2704-57-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-111-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-64-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-56-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-55-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-52-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-51-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-49-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-48-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2704-46-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-44-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-42-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-40-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-58-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-59-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-60-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-38-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-36-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-159-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-152-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-151-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-135-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-128-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-90-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2704-89-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2704-86-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2704-91-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-95-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-96-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-127-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-103-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-120-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-112-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2704-119-0x0000000000400000-0x0000000000480000-memory.dmp

      Filesize

      512KB

    • memory/2764-32-0x00000000010C0000-0x00000000011B4000-memory.dmp

      Filesize

      976KB

    • memory/2764-33-0x0000000000650000-0x000000000066A000-memory.dmp

      Filesize

      104KB

    • memory/2764-35-0x0000000004D10000-0x0000000004DD2000-memory.dmp

      Filesize

      776KB

    • memory/2904-0-0x000000002FF41000-0x000000002FF42000-memory.dmp

      Filesize

      4KB

    • memory/2904-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2904-2-0x00000000737BD000-0x00000000737C8000-memory.dmp

      Filesize

      44KB

    • memory/2904-34-0x00000000737BD000-0x00000000737C8000-memory.dmp

      Filesize

      44KB