Overview

overview

10

Static

static

1

memz-.html

windows11-21h2-x64

Sharing

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General

  • Target
    memz-
  • Size 220KB
  • Sample260814-3x43dsvxay
  • SHA256 ded8235726683be9bc886926b6506dc2b727d5d428346bdcd572d53bc1f3d075
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
killmbrbootkitdefense_evasiondiscoveryexecutionpersistenceransomwaretrojanwiper

Malware Config

Targets

    • Target
      memz-
    • Size 220KB
    • SHA256 ded8235726683be9bc886926b6506dc2b727d5d428346bdcd572d53bc1f3d075
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    bootkitdefense_evasiondiscoveryexecutionkillmbrpersistenceransomwaretrojanwiper

    • Detects KillMBR

    • Family: KillMBR

      KillMBR is a trojan that attempts to overwrite the Master Boot Record.

      wipertrojankillmbr

    • Modifies WinLogon for persistence

      persistence

    • UAC bypass

      defense_evasiontrojan

    • Downloads MZ/PE file

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

      defense_evasion

    • Executes dropped EXE

    • Modifies file permissions

      discovery

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Modifies WinLogon

      persistence

    • 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

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2
T1059

JavaScript

1
T1059.007

Windows Command Shell

1
T1059.003

Persistence

Boot or Logon Autostart Execution

2
T1547

Winlogon Helper DLL

2
T1547.004

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

2
T1547

Winlogon Helper DLL

2
T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

File and Directory Permissions Modification

1
T1222

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

5
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Subvert Trust Controls

1
T1553

SIP and Trust Provider Hijacking

1
T1553.003

Credential Access

Discovery

Browser Information Discovery

1
T1217

Query Registry

1
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Time Discovery

1
T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1
T1491

Tasks