Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-12-2024 19:41

General

  • Target

    WaveSourceInstaller.exe

  • Size

    469KB

  • MD5

    e468b718e67495ea73c85d8258059adf

  • SHA1

    dcad70f5c39ab85f900ef1288067dbf51eaeb503

  • SHA256

    fa9f629254a8bbe915bbd587c0c060de580a18992103858a1d16686de8bd717e

  • SHA512

    b4eb6cc848b5ebfc6bab7e1cc033ec468bc8cf2fed72ea912f9fc60d6eaab75664f4627646960dccab2aceefeab9c5acbd2fe1b57d992c62358929b4d840dedb

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSJn9:uiLJbpI7I2WhQqZ7J9

Malware Config

Extracted

Family

remcos

Botnet

WaveSourceLeaked

C2

204.10.194.175:4444

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-46FS9Q

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Remcos family
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 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 4 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WaveSourceInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\WaveSourceInstaller.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4712
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:872
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3552
        • C:\ProgramData\Remcos\remcos.exe
          C:\ProgramData\Remcos\remcos.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3920
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
              PID:4492

    Network

    • flag-us
      DNS
      217.106.137.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      217.106.137.52.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      83.210.23.2.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      83.210.23.2.in-addr.arpa
      IN PTR
      Response
      83.210.23.2.in-addr.arpa
      IN PTR
      a2-23-210-83deploystaticakamaitechnologiescom
    • flag-us
      DNS
      83.210.23.2.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      83.210.23.2.in-addr.arpa
      IN PTR
    • flag-us
      DNS
      95.221.229.192.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      95.221.229.192.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      212.20.149.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      212.20.149.52.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      206.23.85.13.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      206.23.85.13.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      22.49.80.91.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      22.49.80.91.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      172.214.232.199.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      172.214.232.199.in-addr.arpa
      IN PTR
      Response
    • flag-us
      DNS
      31.243.111.52.in-addr.arpa
      Remote address:
      8.8.8.8:53
      Request
      31.243.111.52.in-addr.arpa
      IN PTR
      Response
    No results found
    • 8.8.8.8:53
      217.106.137.52.in-addr.arpa
      dns
      73 B
      147 B
      1
      1

      DNS Request

      217.106.137.52.in-addr.arpa

    • 8.8.8.8:53
      83.210.23.2.in-addr.arpa
      dns
      140 B
      133 B
      2
      1

      DNS Request

      83.210.23.2.in-addr.arpa

      DNS Request

      83.210.23.2.in-addr.arpa

    • 8.8.8.8:53
      95.221.229.192.in-addr.arpa
      dns
      73 B
      144 B
      1
      1

      DNS Request

      95.221.229.192.in-addr.arpa

    • 8.8.8.8:53
      212.20.149.52.in-addr.arpa
      dns
      72 B
      146 B
      1
      1

      DNS Request

      212.20.149.52.in-addr.arpa

    • 8.8.8.8:53
      206.23.85.13.in-addr.arpa
      dns
      71 B
      145 B
      1
      1

      DNS Request

      206.23.85.13.in-addr.arpa

    • 8.8.8.8:53
      22.49.80.91.in-addr.arpa
      dns
      70 B
      145 B
      1
      1

      DNS Request

      22.49.80.91.in-addr.arpa

    • 8.8.8.8:53
      172.214.232.199.in-addr.arpa
      dns
      74 B
      128 B
      1
      1

      DNS Request

      172.214.232.199.in-addr.arpa

    • 8.8.8.8:53
      31.243.111.52.in-addr.arpa
      dns
      72 B
      158 B
      1
      1

      DNS Request

      31.243.111.52.in-addr.arpa

    • 8.8.8.8:53

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\Remcos\remcos.exe

      Filesize

      469KB

      MD5

      e468b718e67495ea73c85d8258059adf

      SHA1

      dcad70f5c39ab85f900ef1288067dbf51eaeb503

      SHA256

      fa9f629254a8bbe915bbd587c0c060de580a18992103858a1d16686de8bd717e

      SHA512

      b4eb6cc848b5ebfc6bab7e1cc033ec468bc8cf2fed72ea912f9fc60d6eaab75664f4627646960dccab2aceefeab9c5acbd2fe1b57d992c62358929b4d840dedb

    • C:\Users\Admin\AppData\Local\Temp\install.vbs

      Filesize

      386B

      MD5

      1ec6289c6fd4c2ded6b2836ed28cbeb5

      SHA1

      c4e08195e6c640eb8860acc03fda1d649b4fe070

      SHA256

      6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

      SHA512

      20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

    • memory/4492-8-0x0000000000D00000-0x0000000000D7F000-memory.dmp

      Filesize

      508KB

    • memory/4492-9-0x0000000000D00000-0x0000000000D7F000-memory.dmp

      Filesize

      508KB

    • memory/4492-10-0x0000000000D00000-0x0000000000D7F000-memory.dmp

      Filesize

      508KB

    • memory/4492-11-0x0000000000D00000-0x0000000000D7F000-memory.dmp

      Filesize

      508KB

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