Overview

overview

10

Static

static

1

GMB.xls

windows7-x64

10

GMB.xls

windows10-2004-x64

1

Sharing

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General

  • Target

    GMB.xls

  • Size

    317KB

  • Sample

    240416-jj8nwaee2s

  • MD5

    cb5d55cbdd70a44948d1f976af168a59

  • SHA1

    07d995e60e3dbdabf23690014c3a4c74aa1e2139

  • SHA256

    15feeb12f8460eebe263ec750d08dd79e1d26b2704726223f0dc7c6bacd1506d

  • SHA512

    5064d95029d85d8b68947176bd08a186dc18e09e24ed1eebe977710ac399cc6c3a0babfd44bd69d0a3ce14f4840f72ab01acfe0b0d87c377ab1d2cc306fb8e37

  • SSDEEP

    6144:LuunJk9CBY35qAOJl/YrLYz+WrNhZF+E+fgL+0dD8ivSbVd1MIhFjMaZ4EX0ikpM:LvJksA3bVd1MIXMa2EEL+B

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

      GMB.xls

    • Size

      317KB

    • MD5

      cb5d55cbdd70a44948d1f976af168a59

    • SHA1

      07d995e60e3dbdabf23690014c3a4c74aa1e2139

    • SHA256

      15feeb12f8460eebe263ec750d08dd79e1d26b2704726223f0dc7c6bacd1506d

    • SHA512

      5064d95029d85d8b68947176bd08a186dc18e09e24ed1eebe977710ac399cc6c3a0babfd44bd69d0a3ce14f4840f72ab01acfe0b0d87c377ab1d2cc306fb8e37

    • SSDEEP

      6144:LuunJk9CBY35qAOJl/YrLYz+WrNhZF+E+fgL+0dD8ivSbVd1MIhFjMaZ4EX0ikpM:LvJksA3bVd1MIXMa2EEL+B

    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