General

  • Target

    Kirbana.docx

  • Size

    203KB

  • Sample

    240930-prrcfszcnd

  • MD5

    0848cad87734eda3d07e5c1f4421df54

  • SHA1

    a3b15ddaadabbd04fb5d8e45195371830bada2ed

  • SHA256

    64b11a8ac6bde59c9d0446ef7133657080e0709ccafb2583764662150cec6b7e

  • SHA512

    a2441f2636ad9f157a3f75ce79afd2f42382326d989524988b363292648d723e957cb0bafd025852f88fc2953239ea9be65ada723d178a20c406c21a807ffc61

  • SSDEEP

    6144:0PnI1dobp1tYnkbeUmeMIHv/R7CKpybx/B0K0o94:0PI1dobp7IQeUXMwCKpybt0o+

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

C2

107.173.4.16:2404

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-DSGECX

  • 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

      Kirbana.docx

    • Size

      203KB

    • MD5

      0848cad87734eda3d07e5c1f4421df54

    • SHA1

      a3b15ddaadabbd04fb5d8e45195371830bada2ed

    • SHA256

      64b11a8ac6bde59c9d0446ef7133657080e0709ccafb2583764662150cec6b7e

    • SHA512

      a2441f2636ad9f157a3f75ce79afd2f42382326d989524988b363292648d723e957cb0bafd025852f88fc2953239ea9be65ada723d178a20c406c21a807ffc61

    • SSDEEP

      6144:0PnI1dobp1tYnkbeUmeMIHv/R7CKpybx/B0K0o94:0PI1dobp7IQeUXMwCKpybt0o+

    • Remcos

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

    • 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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Detected potential entity reuse from brand MICROSOFT.

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks