Overview

overview

8

Static

static

3

Holzer.exe

windows11-21h2-x64

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General

  • Target

    Holzer.zip

  • Size

    50KB

  • Sample

    250402-t17s1sspz9

  • MD5

    46c66dccda54ac15c941e7589a5da5ca

  • SHA1

    49a4f3b61753f261fc5f3e7d69f599ac0a5e083e

  • SHA256

    f7f624d237f1d81858259c1783be9c7a605fe260b22092af064bc91035010fef

  • SHA512

    c4c96aebf3d0de7127e3e45c5670323781ed8ae4bc0413c6b35cb2f5e9ee8ccaf84d5dbf655b384a1cec4b8d8fcbe5970c43e79bad76cf9a17ada1b3717c57a2

  • SSDEEP

    1536:5dlKxgjOc91+xkuSL7/jVqFqGBh8tCxFngg/:PlJjOc9WkuoQtF1gg/

Score
8/10
bootkitdefense_evasiondiscoveryexploitpersistenceprivilege_escalation

Malware Config

Targets

    • Target

      Holzer.exe

    • Size

      135KB

    • MD5

      c971c68b4e58ccc82802b21ae8488bc7

    • SHA1

      7305f3a0a0a0d489e0bcf664353289f61556de77

    • SHA256

      cede0b15d88c20bc750b516858f8bf31ee472f6cbd01640840890736c4333cce

    • SHA512

      ff199691c35f2748772410bf454e8b76dd67d892dd76fc87d20b3bbe6c145c6af1685344de636326692df792f55d0fba9a0025a7cf491d0b4e73ff45c3b039d7

    • SSDEEP

      3072:2EYGNIaWY/0kTKxIJXtJ0YCHiQtSetFITTTTTHvvvvvNKB:HN5TKvr9PuKB

    Score
    8/10
    bootkitdefense_evasiondiscoveryexploitpersistenceprivilege_escalation

    • Disables RegEdit via registry modification

      defense_evasion

    • Disables Task Manager via registry modification

      defense_evasion

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Possible privilege escalation attempt

      exploit

    • Modifies file permissions

      discovery

    • Enumerates connected drives

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

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

      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

    • Enumerates processes with tasklist

      discovery
    behavioral1

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Persistence

Event Triggered Execution

1
T1546

Accessibility Features

1
T1546.008

Power Settings

1
T1653

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Event Triggered Execution

1
T1546

Accessibility Features

1
T1546.008

Defense Evasion

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

File and Directory Permissions Modification

1
T1222

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

1
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

Peripheral Device Discovery

2
T1120

Process Discovery

1
T1057

Query Registry

4
T1012

Remote System Discovery

1
T1018

System Information Discovery

6
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