Overview

overview

10

Static

static

10

remcos_a.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    90s
  • max time network
    68s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2024, 08:36

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General

  • Target

    remcos_a.exe

  • Size

    469KB

  • MD5

    1378001fde44d1a14e58d260216b083d

  • SHA1

    a912f25eb430a88294d07247d102376081298f74

  • SHA256

    0f7807b0f22b24a7e0faceb349b725b20ddf8720fad7d8ca81a28c03c27c6fe5

  • SHA512

    5baaf285d7e60fdb61d57b355a8d2f071e27452e58236a4815c8d3f5a8d9278a75d08c1b04271e6aec13537d71b78d978e37efad81d9cb49ee7e3b8c52a8e2da

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS0n9:uiLJbpI7I2WhQqZ709

Score
10/10
remcosremotehostdiscoveryevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

electronic-matched.gl.at.ply.gg:5061

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    scvhost

  • copy_folder

    files

  • delete_file

    true

  • hide_file

    true

  • 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-T3QPX0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    scvhost

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

    ratremcos
  • UAC bypass 3 TTPs 1 IoCs
    evasiontrojan
  • Adds policy Run key to start application 2 TTPs 2 IoCs
    persistence
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

    discovery
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
    1⤵
    • Adds policy Run key to start application
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3384
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:396
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:5008
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2860
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\files\scvhost"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2872
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:3920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\files\scvhost
    Filesize

    469KB

    MD5

    1378001fde44d1a14e58d260216b083d

    SHA1

    a912f25eb430a88294d07247d102376081298f74

    SHA256

    0f7807b0f22b24a7e0faceb349b725b20ddf8720fad7d8ca81a28c03c27c6fe5

    SHA512

    5baaf285d7e60fdb61d57b355a8d2f071e27452e58236a4815c8d3f5a8d9278a75d08c1b04271e6aec13537d71b78d978e37efad81d9cb49ee7e3b8c52a8e2da

    Download Submit

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

    506B

    MD5

    8985ca43015bdbcc769f3fe22a9c272d

    SHA1

    364c46b213706342f82362cb3edd828077d86691

    SHA256

    c250ecf9a8c80b79e5493e6daae1fd2630e09a23e6bdc12ab60eb981126f9128

    SHA512

    838608edde24a2fc0927bebe6a08578ce0e0c73d1e67c5d6271c954a1ccbc14b3bad05246266e2d426c74dfab37a9e62be10bd0a19188422c2f4e366c354d427

    Download Submit

  • memory/3920-6-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-7-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-8-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-18-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-17-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-16-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-15-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-14-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-13-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3920-12-0x0000029F8DEC0000-0x0000029F8DEC1000-memory.dmp

    Filesize

    4KB

    Download