Overview

overview

10

Static

static

1

MasonClient.bat

windows10-2004-x64

10

MasonClient.bat

windows11-21h2-x64

10

Sharing

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General

  • Target
    MasonClient.bat
  • Size 1KB
  • Sample260421-ycceesbt2j
  • SHA256 37c1e24ac80c592d6cbe653ded5cf6e23d5407e9ab16b5803fee11de9d0e631f
  • MD5 SHA1 SHA512 TLSH
Score
10/10
bootkitdefense_evasiondiscoveryexecutionpersistencetrojan

Malware Config

Targets

    • Target
      MasonClient.bat
    • Size 1KB
    • SHA256 37c1e24ac80c592d6cbe653ded5cf6e23d5407e9ab16b5803fee11de9d0e631f
    • MD5 SHA1 SHA512 TLSH
    Score
    10/10
    bootkitdefense_evasiondiscoveryexecutionpersistencetrojan

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • UAC bypass

      defense_evasiontrojan

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

      execution

    • Downloads MZ/PE file

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

      persistence

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

      defense_evasion

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

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

Indicator Removal

1
T1070

Clear Windows Event Logs

1
T1070.001

Modify Registry

2
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

6
T1012

System Information Discovery

5
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks