General

  • Target

    0d4bf4e1a47fa2cfdb5cdc23d8a2b1552c1d82c307e1eec95297e62a478d2f2d.exe

  • Size

    466KB

  • Sample

    241109-cj8kjsvemp

  • MD5

    23350a33531966fa6a0cf02f9c27f053

  • SHA1

    1f53024c59b6b65fcf032bd5bb69cedbdcc67dfa

  • SHA256

    0d4bf4e1a47fa2cfdb5cdc23d8a2b1552c1d82c307e1eec95297e62a478d2f2d

  • SHA512

    b6f8bbbbc5bf9b4d982bdab369513b5667835aa6660678917c259b599d563c7ad2d8f5233e4c62d962523393d8faa51087e3696fa72cabbde81ec1a39d3adfac

  • SSDEEP

    12288:JuD09AUkNIGBYYv4eK13x13nZHSRVMf139F5wIB7+IwtHwBtVxbesvZDS57G+DY:809AfNIEYsunZvZ19ZiGs

Malware Config

Extracted

Family

remcos

Botnet

R2411

C2

cc.shinrarigs.com:2404

45.32.129.178:2404

Attributes
  • audio_folder

    MicRecords (em inglês)

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    BraveSharedUpdater.exe

  • copy_folder

    BraveShared

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    BravePrivate

  • mouse_option

    false

  • mutex

    Brv-Q0EV0O

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Capturas de tela

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      0d4bf4e1a47fa2cfdb5cdc23d8a2b1552c1d82c307e1eec95297e62a478d2f2d.exe

    • Size

      466KB

    • MD5

      23350a33531966fa6a0cf02f9c27f053

    • SHA1

      1f53024c59b6b65fcf032bd5bb69cedbdcc67dfa

    • SHA256

      0d4bf4e1a47fa2cfdb5cdc23d8a2b1552c1d82c307e1eec95297e62a478d2f2d

    • SHA512

      b6f8bbbbc5bf9b4d982bdab369513b5667835aa6660678917c259b599d563c7ad2d8f5233e4c62d962523393d8faa51087e3696fa72cabbde81ec1a39d3adfac

    • SSDEEP

      12288:JuD09AUkNIGBYYv4eK13x13nZHSRVMf139F5wIB7+IwtHwBtVxbesvZDS57G+DY:809AfNIEYsunZvZ19ZiGs

    • Modifies Windows Defender notification settings

    • Remcos

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

    • Remcos family

    • UAC bypass

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Adds policy Run key to start application

    • Blocklisted process makes network request

    • Disables Task Manager via registry modification

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks