General

  • Target

    c3fdb4708284f36fdfe509cd2c2ca35a60d78e7df67529c6182e3f7dd554d9c3.tar

  • Size

    1.2MB

  • Sample

    240725-gkytyssbkr

  • MD5

    a87c8f217b713e36c862e69242d53e99

  • SHA1

    fbbbe397ba1ab9850d94b622a4c8f14e08be14f9

  • SHA256

    c3fdb4708284f36fdfe509cd2c2ca35a60d78e7df67529c6182e3f7dd554d9c3

  • SHA512

    fd6d7e6e905571149a98580a3b22c287bc7ad5ad0f7a3fb55395d13c0e811e35586598cbed35718a483cf7ec089836869461770fe5e7c59456f6dd67f32ffe4c

  • SSDEEP

    24576:UjWx3xQdd8fdq8EvCW+RSZhD445cr8VWO5g3EVB:UKVyL8fC+8XD445mY5g3EVB

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:59321

nnamoo.duckdns.org:59321

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

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-S35D6F

  • 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

      Purchase order.exe

    • Size

      1.2MB

    • MD5

      c4b7573f2c4f0a5e821a52a54d0bb3ea

    • SHA1

      49ec6d45fcdcfc5bc310552432864fe5d07967b9

    • SHA256

      50cad212d3a943e3c69974119c050fec40d82bfa7ccf94ab28121445138c4f5f

    • SHA512

      88cdd0be3100467ef2d5b2a79c407e3e7fc58a0ede56b46ae2fdbb220bdab06527beca5b28244d0960ed7820964e72ff52705932c9c7dab4df52d535dbaa782b

    • SSDEEP

      24576:LjWx3xQdd8fdq8EvCW+RSZhD445cr8VWO5g3EVB:LKVyL8fC+8XD445mY5g3EVB

    • Remcos

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks