Overview

overview

10

Static

static

3

bcfa3ad9b1...10.exe

windows7-x64

7

bcfa3ad9b1...10.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    bcfa3ad9b1ba0c2d1352d94f8ff180da7456d7ba29d4570e809b083a5cb80c10

  • Size

    135KB

  • Sample

    240522-g8hgwafa9y

  • MD5

    fc407f4e9875a20f081c5b7bd19e80e3

  • SHA1

    f014e96a054d661d14df6d0212b56396eeaad52b

  • SHA256

    bcfa3ad9b1ba0c2d1352d94f8ff180da7456d7ba29d4570e809b083a5cb80c10

  • SHA512

    03f7e8ccbcdabd790141ebc5c20982dec667691e31a49c60f5ba9a71324e9fc1691343938646ebeee187608956fa32ef4dbc9312093a034e9245c522c8a1fe0e

  • SSDEEP

    1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK/:xPd4n/M+WLcilrpgGH/GwY87mVmIXP

Score
10/10
remcoshostpersistencerat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000
Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    OfficeUpgrade.exe

  • copy_folder

    OfficeUpgrade

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    Upgrader.dat

  • keylog_flag

    false

  • keylog_folder

    Upgrader

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    req_khauflaoyr

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    OfficeUpgrade

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      bcfa3ad9b1ba0c2d1352d94f8ff180da7456d7ba29d4570e809b083a5cb80c10

    • Size

      135KB

    • MD5

      fc407f4e9875a20f081c5b7bd19e80e3

    • SHA1

      f014e96a054d661d14df6d0212b56396eeaad52b

    • SHA256

      bcfa3ad9b1ba0c2d1352d94f8ff180da7456d7ba29d4570e809b083a5cb80c10

    • SHA512

      03f7e8ccbcdabd790141ebc5c20982dec667691e31a49c60f5ba9a71324e9fc1691343938646ebeee187608956fa32ef4dbc9312093a034e9245c522c8a1fe0e

    • SSDEEP

      1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK/:xPd4n/M+WLcilrpgGH/GwY87mVmIXP

    Score
    10/10
    persistenceremcoshostrat

    • Remcos

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

      ratremcos

    • detects Windows exceutables potentially bypassing UAC using eventvwr.exe

    • 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

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

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

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks