General

  • Target

    0x0006000000022f79-135.dat

  • Size

    469KB

  • Sample

    221004-nj75kabagk

  • MD5

    def2429e8b8234c26faccdc4737f819b

  • SHA1

    c412343ad47d1bec84df30f9ba951179bb2e78d8

  • SHA256

    9c020f4f97c6fa58dd08d893d80442113527ef83880c0ecf2a4eb8d32a64fbab

  • SHA512

    99d152eb4921b80763e47c9310320c1e86d9efdf0ac7ecf1cb785155cbd52bfb2a1a7d61f001a69ada561660176947ee8d69a2c780634f632c95da3a0af0203c

  • SSDEEP

    12288:umnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSXn9:WiLJbpI7I2WhQqZ7X9

Malware Config

Extracted

Family

remcos

Botnet

NEW

C2

remcapi.duckdns.org:2028

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    FILE.EXE

  • copy_folder

    work

  • delete_file

    true

  • 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-L9LQMY

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    file

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      0x0006000000022f79-135.dat

    • Size

      469KB

    • MD5

      def2429e8b8234c26faccdc4737f819b

    • SHA1

      c412343ad47d1bec84df30f9ba951179bb2e78d8

    • SHA256

      9c020f4f97c6fa58dd08d893d80442113527ef83880c0ecf2a4eb8d32a64fbab

    • SHA512

      99d152eb4921b80763e47c9310320c1e86d9efdf0ac7ecf1cb785155cbd52bfb2a1a7d61f001a69ada561660176947ee8d69a2c780634f632c95da3a0af0203c

    • SSDEEP

      12288:umnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSXn9:WiLJbpI7I2WhQqZ7X9

    • Remcos

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

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Adds policy Run key to start application

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • 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

    • Detected potential entity reuse from brand microsoft.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

2
T1060

Defense Evasion

Modify Registry

3
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Tasks