Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/01/2025, 14:18

General

  • Target
    Ref. 56433905218740.exe
  • Size 1.2MB
  • Sample250120-rl9b7atkel
  • SHA256 4ee8706cd6bf820a75a528e933d35a306ac18d466cc989a3317be9f5be9c1e5e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 206.189.218.238:4782

  • 206.189.218.238:2286

  • 206.189.218.238:3363

  • 206.189.218.238:3386

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-9IFJWE

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • 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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 5 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 12 IoCs

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

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Ref. 56433905218740.exe
    "C:\Users\Admin\AppData\Local\Temp\Ref. 56433905218740.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4804
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\njnk.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3516
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /release
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1472
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /release
          4⤵
          • System Location Discovery: System Language Discovery
          • Gathers network information
          PID:1492
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c puachd.msc jtllpsq.3gp
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4784
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\puachd.msc
          puachd.msc jtllpsq.3gp
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2332
          • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
            "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
            5⤵
            • 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:4612
            • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
              C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\xlmwhruzurhmbrvamtbeuzmzojhnhonubk"
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              PID:4020
            • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
              C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\ifroij"
              6⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              • System Location Discovery: System Language Discovery
              PID:4576
            • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
              C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe /stext "C:\Users\Admin\AppData\Local\Temp\khxhicquw"
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:4548
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ipconfig /renew
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4244
        • C:\Windows\SysWOW64\ipconfig.exe
          ipconfig /renew
          4⤵
          • System Location Discovery: System Language Discovery
          • Gathers network information
          PID:1152

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        logs.dat

        • Path C:\ProgramData\remcos\logs.dat
        • Size 144B
        • SHA256 447ae3e0214d0d716d930e099a31ff9c0667da662b1ed0ae410b0b5a26b8b224
        • MD5 SHA1 SHA512

        akkvgnnbca.3gp

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\akkvgnnbca.3gp
        • Size 582B
        • SHA256 15547f9086ba0e57e5180958fa7e88fc00352cfe310e7d8f230c45a2799df1c8
        • MD5 SHA1 SHA512

        bwoclqaj.das

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bwoclqaj.das
        • Size 515B
        • SHA256 d7164364ac84fb0152498fac802ae96dab8ed74bf9888ebdf6c41ebecbe4ba4e
        • MD5 SHA1 SHA512

        fqiwhjd.dll

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\fqiwhjd.dll
        • Size 534B
        • SHA256 5b7a5af5c268c2dee97fe2af4c1c847fa64d17ea66b957a17ad1754a311faaa6
        • MD5 SHA1 SHA512

        fwajoo.das

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\fwajoo.das
        • Size 609B
        • SHA256 8da0f6e0e38eb20a7036124817c11856ede08758a119964b6de0cd54bf06c331
        • MD5 SHA1 SHA512

        jtjas.txt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\jtjas.txt
        • Size 586B
        • SHA256 bf556c8c0b1b099a4318bb8947a1c9fe1a96d2b8f09a14dbf42cf6260d9aad37
        • MD5 SHA1 SHA512

        mgbeebdm.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mgbeebdm.msc
        • Size 571B
        • SHA256 a644c7087793afcb8cfdbe3bf9d99bb5a45f18b1c293078c570c855ded567a15
        • MD5 SHA1 SHA512

        mrnf.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mrnf.mp3
        • Size 36KB
        • SHA256 45ed5474e480538082a0923cd2738fdacd7b5437b2386b5faea74e08ab720fd5
        • MD5 SHA1 SHA512 SSDEEP

        mrnf.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\mrnf.mp3
        • Size 36KB
        • SHA256 62fcf3a4f093f267fd54af93fce5a09608eba265f078345d9de40075a4931655
        • MD5 SHA1 SHA512 SSDEEP

        njnk.vbe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\njnk.vbe
        • Size 169KB
        • SHA256 42ea84f0ecd77198f23c0938eb87ed52815533a30421e6e21bbf3fb8832b6990
        • MD5 SHA1 SHA512 SSDEEP

        njppllwh.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\njppllwh.mp3
        • Size 527B
        • SHA256 2a7015be009060a21ba031b95c837d0e54e9181a0c31191ae223d3fd874479e9
        • MD5 SHA1 SHA512

        nxftmchn.mp3

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\nxftmchn.mp3
        • Size 595B
        • SHA256 d5ae7b557f0d0ef7928bfa6c95ddbadca354a0e590a01b4e301baa7f52f3ba4c
        • MD5 SHA1 SHA512

        pgrkjrdrwr.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\pgrkjrdrwr.docx
        • Size 552B
        • SHA256 02ca4045fd519b75452e6f62e2b239804b3d31c604b3aaf46250e09191626aac
        • MD5 SHA1 SHA512

        phcjrkhjbp.bin

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\phcjrkhjbp.bin
        • Size 584B
        • SHA256 9f96a8d9c7b014187ff7e68502018d803011797c6dfcad01531a122473dc37b0
        • MD5 SHA1 SHA512

        pkifnicf.xl

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\pkifnicf.xl
        • Size 600B
        • SHA256 bbcdc92a9eedd9f3f6bcc3e5300c7fcf0f3c637b398ff48002920692ff709d4d
        • MD5 SHA1 SHA512

        puachd.msc

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\puachd.msc
        • Size 925KB
        • SHA256 98e4f904f7de1644e519d09371b8afcbbf40ff3bd56d76ce4df48479a4ab884b
        • MD5 SHA1 SHA512 SSDEEP

        qbfovgn.docx

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\qbfovgn.docx
        • Size 530B
        • SHA256 1f13dcdcb88cf9c17a2fe2b530c45286226adf44a368894b3da7782f5b006a05
        • MD5 SHA1 SHA512

        uogxhqjurf.unj

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\uogxhqjurf.unj
        • Size 879KB
        • SHA256 829d9797e898db11878d79b7588f1efb271c08761a0fbedc00c2ddca1ca1a762
        • MD5 SHA1 SHA512 SSDEEP

        xiawlvwkw.ppt

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiawlvwkw.ppt
        • Size 611B
        • SHA256 4c64c814fada340bf06af521a036a95aef0c8353fcd7cbf5ccf9df78e1943e21
        • MD5 SHA1 SHA512

        xsjduanaek.pdf

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xsjduanaek.pdf
        • Size 614B
        • SHA256 022dd133d94d4ca79aac1d3f6ae3b01f262b0eddc650f3c9b2d9e5c605326869
        • MD5 SHA1 SHA512

        xsrglhc.icm

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\xsrglhc.icm
        • Size 560B
        • SHA256 3243d6e21b3b3a33dd7692cbd2f7f7683aa614d46d460138cdc9066cbbdab082
        • MD5 SHA1 SHA512

        RegSvcs.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        • Size 44KB
        • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
        • MD5 SHA1 SHA512 SSDEEP

        xlmwhruzurhmbrvamtbeuzmzojhnhonubk

        • Path C:\Users\Admin\AppData\Local\Temp\xlmwhruzurhmbrvamtbeuzmzojhnhonubk
        • Size 4KB
        • SHA256 4d50e4b2ee7b25d6a88dea6a28503975ca95f98e6e72fcd1ee754d016df3ed3d
        • MD5 SHA1 SHA512 SSDEEP

        memory/4020-155-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4020-153-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4020-144-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/4548-151-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/4548-156-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/4548-158-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/4576-154-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/4576-147-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/4576-150-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/4612-126-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-167-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/4612-137-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-136-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-135-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-134-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-123-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-131-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-130-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-164-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/4612-168-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/4612-139-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-169-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-172-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-173-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-125-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-181-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-180-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-190-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-189-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-197-0x0000000000FA0000-0x00000000016A1000-memory.dmp

        memory/4612-198-0x0000000000FA0000-0x00000000016A1000-memory.dmp