Overview

overview

10

Static

static

3

4d8f242a1d...47.exe

windows7-x64

10

4d8f242a1d...47.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347.exe

  • Size

    388KB

  • Sample

    250110-rrkk1swqhw

  • MD5

    a0acd7920f09a59331e008f8d3dc7ac1

  • SHA1

    f6bf51b2bccc91476136e43a91b17076ed78b083

  • SHA256

    4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347

  • SHA512

    10aa260961df5472b9b79a72fb9ab1a4ea9c088c817db107f9355fbb7b6b3369b17127933ead6b10a01e4270e3f533e37699eeb77dd084d8821d47c5fc5c870e

  • SSDEEP

    6144:pvesyWj0MhFpikvYFmSkoxT88KaUqcZLROqNwlggoWLOEC:pesyY0M3xvYDY8KgchIvlgXWy

Score
10/10
remcosyavakosadiscoverypersistencerat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

C2

198.23.227.212:32583

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    yavascript.exe

  • copy_folder

    xenor

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-I7G983

  • 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

      4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347.exe

    • Size

      388KB

    • MD5

      a0acd7920f09a59331e008f8d3dc7ac1

    • SHA1

      f6bf51b2bccc91476136e43a91b17076ed78b083

    • SHA256

      4d8f242a1d64b3b41748d2bd56ee6f7119434dedcdf793a83cea95fb31d13347

    • SHA512

      10aa260961df5472b9b79a72fb9ab1a4ea9c088c817db107f9355fbb7b6b3369b17127933ead6b10a01e4270e3f533e37699eeb77dd084d8821d47c5fc5c870e

    • SSDEEP

      6144:pvesyWj0MhFpikvYFmSkoxT88KaUqcZLROqNwlggoWLOEC:pesyY0M3xvYDY8KgchIvlgXWy

    Score
    10/10
    remcosyavakosadiscoverypersistencerat

    • Remcos

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

      ratremcos

    • Remcos family

      remcos

    • 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

      persistence
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks