Overview

overview

10

Static

static

1

fffa5b3e68...95.exe

windows7-x64

10

fffa5b3e68...95.exe

windows10-2004-x64

10

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General

  • Target

    fffa5b3e6850c4b61005f41003623395.exe

  • Size

    775KB

  • Sample

    230309-kl1xgsbe37

  • MD5

    fffa5b3e6850c4b61005f41003623395

  • SHA1

    88f8e7c796b1bdd7f81a277ea68e3f931e41b829

  • SHA256

    fa46624d2dd01d99a0a1801e67a9e7688d477c1b8e12ca8b50c271a8f226271b

  • SHA512

    91328d23c27dc7a7efdbfde53b8cb2ce072cae355047218887a41dad912a13c53babb1acbacb233d8f7e8d68f4708f959b5f7042c513baa6b982b5c597b20cf7

  • SSDEEP

    24576:JuOZ6wGkB+e9uf80lzUOjj/46TLLR2fUHO:iSOjDzLL4fUHO

Score
10/10
remcosupdatemicrosoftevasionpersistencephishingrattrojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Update

C2

ytuna1709.duckdns.org:3035

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    Windows Start-Up Audio.exe

  • copy_folder

    Microsoft Start-Up Media

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Windows Display

  • keylog_path

    %WinDir%

  • mouse_option

    false

  • mutex

    Windows Audio

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    Microsoft Sound Endpoint

  • take_screenshot_option

    true

  • take_screenshot_time

    5

  • take_screenshot_title

    Username;password;proforma;invoice;notepad

Targets

    • Target

      fffa5b3e6850c4b61005f41003623395.exe

    • Size

      775KB

    • MD5

      fffa5b3e6850c4b61005f41003623395

    • SHA1

      88f8e7c796b1bdd7f81a277ea68e3f931e41b829

    • SHA256

      fa46624d2dd01d99a0a1801e67a9e7688d477c1b8e12ca8b50c271a8f226271b

    • SHA512

      91328d23c27dc7a7efdbfde53b8cb2ce072cae355047218887a41dad912a13c53babb1acbacb233d8f7e8d68f4708f959b5f7042c513baa6b982b5c597b20cf7

    • SSDEEP

      24576:JuOZ6wGkB+e9uf80lzUOjj/46TLLR2fUHO:iSOjDzLL4fUHO

    Score
    10/10
    remcosupdateevasionpersistencerattrojanmicrosoftphishing

    • Remcos

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

      ratremcos

    • UAC bypass

      evasiontrojan

    • 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

    • Detected potential entity reuse from brand microsoft.

      phishingmicrosoft

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

4
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks