Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-11-2024 16:01

General

  • Target

    rQ000112241R02_October-24.exe

  • Size

    3.7MB

  • MD5

    b7419c5f4cb484befbb098627475a806

  • SHA1

    c59a69a2a19fab12903b38a73fea20edc7013abb

  • SHA256

    b7cd81494be4fd997d0d47cde6689f357b52f4ac8c50ab730569edef51a25a8c

  • SHA512

    471cb8e64ad1048c0f7d211212cd014d4b561f041aa4d9f8c324aa5736d5e37a65292218c3f8eba78298f9d9fa48fd2f3b932912eecfd305f744ac583ca1eed6

  • SSDEEP

    24576:G6NBJgWDzcRxQi9yiLiS02733o8MpIVPc:hBJgWAQi9y+502Cm0

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

198.46.178.148:2024

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-Z20G9Z

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • 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
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • 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 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rQ000112241R02_October-24.exe
    "C:\Users\Admin\AppData\Local\Temp\rQ000112241R02_October-24.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 AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2912
    • 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\rQ000112241R02_October-24.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3688
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1128
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\bcnnhryacgctjynsbpvoqqxyrdmzub"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:2028
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\lwaxikjcqougtebwsaqptdrpajeinmffm"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:1028
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\nyfqj"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4512
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
      2⤵
        PID:2948
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x418 0x410
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:5004

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      222B

      MD5

      43c1929fa71c7dc8c55f88f39bef7d29

      SHA1

      0ed497019be48d5899d6ef0b23a23e39741557ba

      SHA256

      1cee1e93e13151713f293aef21497cb31ee666be8546c5c909ae801475eb4740

      SHA512

      43873c897797e0aaf491f59032e06bc36427a1c06a3e2b44686b12782df708e6fa0101716972f76849043622968fa064f6a614a00e0f7e7cea5fe42852371304

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_buogjl04.ups.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      4KB

      MD5

      bc25ccf39db8626dc249529bcc8c5639

      SHA1

      3e9cbdb20a0970a3c13719a2f289d210cdcc9e1d

      SHA256

      b333f8c736c701bc826886f395d928731850cbce6db77be752b3cf7979114904

      SHA512

      9a546127bddc1d187e674cda82e6c5046cac7f3e6f9515aed68d5bff2264b9d679d857dd97270e10826cd11ce2d92d82dd7f9801e19027e346b60bcc814cca1a

    • memory/1028-80-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1028-83-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1028-79-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1128-43-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-72-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-51-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-100-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-58-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-99-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-97-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-23-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-6-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-12-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-16-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-28-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-30-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-7-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-96-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1128-59-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-36-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-37-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-39-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-42-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-41-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-95-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1128-5-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-50-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-92-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1128-11-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-35-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-66-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-67-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-70-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-71-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-4-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-73-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/1128-77-0x0000000000400000-0x000000000047F000-memory.dmp

      Filesize

      508KB

    • memory/2028-78-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2028-82-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2028-84-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2912-1-0x00000209FB9C0000-0x00000209FB9CA000-memory.dmp

      Filesize

      40KB

    • memory/2912-0-0x00007FFBF6CA3000-0x00007FFBF6CA5000-memory.dmp

      Filesize

      8KB

    • memory/2912-34-0x00007FFBF6CA0000-0x00007FFBF7761000-memory.dmp

      Filesize

      10.8MB

    • memory/2912-3-0x00007FFBF6CA0000-0x00007FFBF7761000-memory.dmp

      Filesize

      10.8MB

    • memory/2912-2-0x00000209FDE90000-0x00000209FDF60000-memory.dmp

      Filesize

      832KB

    • memory/3688-33-0x00007FFBF6CA0000-0x00007FFBF7761000-memory.dmp

      Filesize

      10.8MB

    • memory/3688-8-0x00007FFBF6CA3000-0x00007FFBF6CA5000-memory.dmp

      Filesize

      8KB

    • memory/3688-22-0x000001EBFA650000-0x000001EBFA672000-memory.dmp

      Filesize

      136KB

    • memory/3688-10-0x00007FFBF6CA0000-0x00007FFBF7761000-memory.dmp

      Filesize

      10.8MB

    • memory/3688-9-0x00007FFBF6CA0000-0x00007FFBF7761000-memory.dmp

      Filesize

      10.8MB

    • memory/4512-81-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4512-85-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4512-86-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB