Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/06/2024, 01:05

General

  • Target
    0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152.exe
  • Size 986KB
  • Sample240607-bfzmssfh74
  • SHA256 0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 104.250.180.178:7902

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    AnyDesk.exe

  • copy_folder

    AnyDesk

  • 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

    AnyDesk

  • mouse_option

    false

  • mutex

    AnyDesk-8BNQK6

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 22 IoCs
  • Detects executables built or packed with MPress PE compressor 12 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 1 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 6 IoCs
  • Reads user/profile data of web browsers 2 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 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152.exe
    "C:\Users\Admin\AppData\Local\Temp\0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3848
    • C:\Users\Admin\AppData\Local\Temp\0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152.exe
      "C:\Users\Admin\AppData\Local\Temp\0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2316
      • C:\ProgramData\AnyDesk\AnyDesk.exe
        "C:\ProgramData\AnyDesk\AnyDesk.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2248
        • C:\ProgramData\AnyDesk\AnyDesk.exe
          "C:\ProgramData\AnyDesk\AnyDesk.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1076
          • C:\ProgramData\AnyDesk\AnyDesk.exe
            C:\ProgramData\AnyDesk\AnyDesk.exe /stext "C:\Users\Admin\AppData\Local\Temp\thxpthpfeyhp"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            PID:3676
          • C:\ProgramData\AnyDesk\AnyDesk.exe
            C:\ProgramData\AnyDesk\AnyDesk.exe /stext "C:\Users\Admin\AppData\Local\Temp\ejcimaayagzcygd"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            PID:32
          • C:\ProgramData\AnyDesk\AnyDesk.exe
            C:\ProgramData\AnyDesk\AnyDesk.exe /stext "C:\Users\Admin\AppData\Local\Temp\oepsnslaoorhaurbdei"
            5⤵
            • Executes dropped EXE
            PID:2512
          • C:\ProgramData\AnyDesk\AnyDesk.exe
            C:\ProgramData\AnyDesk\AnyDesk.exe /stext "C:\Users\Admin\AppData\Local\Temp\oepsnslaoorhaurbdei"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2176
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4168,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=3888 /prefetch:8
    1⤵
      PID:1984

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          AnyDesk.exe

          • Path C:\ProgramData\AnyDesk\AnyDesk.exe
          • Size 986KB
          • SHA256 0a9f6da50ec15864bd2f5952afb9edd17a30ef0fa2d311a53e14a40ccd845152
          • MD5 SHA1 SHA512 SSDEEP

          logs.dat

          • Path C:\ProgramData\AnyDesk\logs.dat
          • Size 144B
          • SHA256 1c18c4168d20b92d713a814989cf509c4ab2f64fe1f171335bb3315c3ff99767
          • MD5 SHA1 SHA512

          thxpthpfeyhp

          • Path C:\Users\Admin\AppData\Local\Temp\thxpthpfeyhp
          • Size 4KB
          • SHA256 2967c8bcad47ab6cb88bf5b60a3a75b49f471a943d33c9b69aa7bfe1b763cfd2
          • MD5 SHA1 SHA512 SSDEEP

          memory/32-51-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/32-54-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/32-56-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/1076-78-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/1076-77-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/1076-106-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-105-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-97-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-98-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-89-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-90-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-81-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-82-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-74-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/1076-47-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-79-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-44-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-42-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-43-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-40-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-39-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-36-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/1076-35-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2176-64-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2176-63-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2176-58-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2248-29-0x000000007441E000-0x000000007441F000-memory.dmp

          memory/2248-31-0x0000000005520000-0x0000000005536000-memory.dmp

          memory/2248-30-0x0000000074410000-0x0000000074BC0000-memory.dmp

          memory/2248-41-0x0000000074410000-0x0000000074BC0000-memory.dmp

          memory/2316-28-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2316-13-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2316-15-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2316-12-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2316-11-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3676-55-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3676-53-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3676-49-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3848-5-0x0000000074430000-0x0000000074BE0000-memory.dmp

          memory/3848-24-0x0000000074430000-0x0000000074BE0000-memory.dmp

          memory/3848-3-0x0000000004E90000-0x0000000004F22000-memory.dmp

          memory/3848-6-0x0000000005210000-0x0000000005226000-memory.dmp

          memory/3848-0-0x000000007443E000-0x000000007443F000-memory.dmp

          memory/3848-1-0x00000000003C0000-0x00000000004BC000-memory.dmp

          memory/3848-7-0x00000000054F0000-0x00000000054FE000-memory.dmp

          memory/3848-2-0x0000000005510000-0x0000000005AB4000-memory.dmp

          memory/3848-4-0x0000000004F60000-0x0000000004F6A000-memory.dmp

          memory/3848-10-0x00000000063F0000-0x000000000648C000-memory.dmp

          memory/3848-9-0x0000000006210000-0x00000000062D0000-memory.dmp

          memory/3848-8-0x0000000005500000-0x0000000005510000-memory.dmp