General

  • Target

    Employee Performance Report_pdf.exe

  • Size

    905KB

  • Sample

    250403-21qthawthw

  • MD5

    4d936712b148d8e083aa300c2cb722da

  • SHA1

    4b6f6d71140b8df5cdb952ef24ca8caac8b58b9b

  • SHA256

    9afdb7400c9c3d7dfe2fa696ac8d95e2049f1a3367cc3345848ce91f40928bb1

  • SHA512

    17cf1f6d30b7d86e3dda497d9f75a954b63d369a2bd6fdbd7d5efe2a94b43184186e312fc96e748f96ea50caab65efe5765f9e16b4de57942f4af82adab2a6e2

  • SSDEEP

    24576:xYi54ltxFsaopF0YL1uPkQWNRIyE2mPcd:OJDFsaopFt1OkTD

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:2404

196.251.93.4:2404

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-LQXWP4

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      Employee Performance Report_pdf.exe

    • Size

      905KB

    • MD5

      4d936712b148d8e083aa300c2cb722da

    • SHA1

      4b6f6d71140b8df5cdb952ef24ca8caac8b58b9b

    • SHA256

      9afdb7400c9c3d7dfe2fa696ac8d95e2049f1a3367cc3345848ce91f40928bb1

    • SHA512

      17cf1f6d30b7d86e3dda497d9f75a954b63d369a2bd6fdbd7d5efe2a94b43184186e312fc96e748f96ea50caab65efe5765f9e16b4de57942f4af82adab2a6e2

    • SSDEEP

      24576:xYi54ltxFsaopF0YL1uPkQWNRIyE2mPcd:OJDFsaopFt1OkTD

    • Guloader family

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

    • Remcos

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

    • Remcos family

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Target

      $PLUGINSDIR/System.dll

    • Size

      12KB

    • MD5

      cff85c549d536f651d4fb8387f1976f2

    • SHA1

      d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

    • SHA256

      8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

    • SHA512

      531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

    • SSDEEP

      192:Zjvco0qWTlt70m5Aj/lQ0sEWD/wtYbBHFNaDybC7y+XBz0QPi:FHQlt70mij/lQRv/9VMjzr

    Score
    3/10

MITRE ATT&CK Enterprise v15

Tasks