Overview

overview

10

Static

static

10

COMSurrogate.exe

windows7-x64

1

COMSurrogate.exe

windows10-2004-x64

10

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General

  • Target

    COMSurrogate.exe

  • Size

    92KB

  • Sample

    250328-zfa67ssqt9

  • MD5

    f2a955b86d8b8ee7767e281d1f365f09

  • SHA1

    19b4b0e948a0d5dbd802e95aa0715c95d7889d32

  • SHA256

    c0d4c3f39c9f144c79f5e12aee1eda7e7ae4c563c01effd7f2435fe5fbd8acc1

  • SHA512

    60f2a34b1a477e576d95307cad6488927da85bcef8d80b6deab3bd8ba8e0c142c8202a7b5a42f9d89da307fa8ba09dda65be2c5256c143cfbf695b69ad05d966

  • SSDEEP

    1536:IhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6trU:OhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+N

Score
10/10
remcoshostdefense_evasiondiscoverypersistencerattrojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

ddffg-52874.portmap.host:52874

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    COM Surrogate

  • copy_folder

    AppDataX

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_xouefyyxav

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    WindowsNotification

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      COMSurrogate.exe

    • Size

      92KB

    • MD5

      f2a955b86d8b8ee7767e281d1f365f09

    • SHA1

      19b4b0e948a0d5dbd802e95aa0715c95d7889d32

    • SHA256

      c0d4c3f39c9f144c79f5e12aee1eda7e7ae4c563c01effd7f2435fe5fbd8acc1

    • SHA512

      60f2a34b1a477e576d95307cad6488927da85bcef8d80b6deab3bd8ba8e0c142c8202a7b5a42f9d89da307fa8ba09dda65be2c5256c143cfbf695b69ad05d966

    • SSDEEP

      1536:IhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6trU:OhzYTGWVvJ8f2v1TbPzuMsIFSHNThy+N

    Score
    10/10
    remcoshostdefense_evasiondiscoverypersistencerattrojan

    • Modifies WinLogon for persistence

      persistence

    • Remcos

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

      ratremcos

    • Remcos family

      remcos

    • UAC bypass

      defense_evasiontrojan

    • Adds policy Run key to start application

      persistence

    • Checks computer location settings

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

    • Adds Run key to start application

      persistence

    • Modifies WinLogon

      persistence
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

2
T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

2
T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

6
T1112

Credential Access

Discovery

Query Registry

1
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks