Overview

overview

10

Static

static

1

new.xls

windows7-x64

10

new.xls

windows10-2004-x64

1

Sharing

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General

  • Target

    new.xls

  • Size

    162KB

  • Sample

    240416-sylmbsdf37

  • MD5

    3656be2ecdf6e61566462ef1488090ad

  • SHA1

    09de9cf6875a005f44bed96ed5ef95903b1c79ef

  • SHA256

    7ae95a8a8acbb5edb84c2972ac93b61f525c74d9731d2d72af88e53a40faf01e

  • SHA512

    c7c4fad2497ed78611a557d93460b3069fe53e79fbb7da03e5b7468dc607e2a9fa608a1e380e0ad5e0794094daef4df00114d85a0485a17d9cda0f27535bd9f3

  • SSDEEP

    3072:AXkJAg15J68xcYy/iCkku4+CyX4l9WGodWRtFxNP8l4eXa0H1G:AXunJ1cYy/ElCwW9zodWtF0l4en

Score
10/10
remcosremotehostpersistencerat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

rmcnewlistening.duckdns.org:14645

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-AK1F22

  • 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

      new.xls

    • Size

      162KB

    • MD5

      3656be2ecdf6e61566462ef1488090ad

    • SHA1

      09de9cf6875a005f44bed96ed5ef95903b1c79ef

    • SHA256

      7ae95a8a8acbb5edb84c2972ac93b61f525c74d9731d2d72af88e53a40faf01e

    • SHA512

      c7c4fad2497ed78611a557d93460b3069fe53e79fbb7da03e5b7468dc607e2a9fa608a1e380e0ad5e0794094daef4df00114d85a0485a17d9cda0f27535bd9f3

    • SSDEEP

      3072:AXkJAg15J68xcYy/iCkku4+CyX4l9WGodWRtFxNP8l4eXa0H1G:AXunJ1cYy/ElCwW9zodWtF0l4en

    Score
    10/10
    remcosremotehostpersistencerat

    • Remcos

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

      ratremcos

    • Blocklisted process makes network request

    • Abuses OpenXML format to download file from external location

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Exploitation for Client Execution

1
T1203

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

System Information Discovery

3
T1082

Query Registry

3
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks