Overview

overview

8

Static

static

3

PartAssist.exe

windows11-ltsc_2024-x64

8

Resubmissions

11/07/2026, 23:02

260711-21c8eaa14j8

11/07/2026, 22:59

260711-2yphnads2s6

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General

  • Target
    PartAssist.exe
  • Size 57.8MB
  • Sample260711-21c8eaa14j
  • SHA256 39bf111c8fbfd9f6f7980ed6d68c67b51f1ef58279de4caa9c14fa822b83c4e4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
aspackv2bootkitdefense_evasiondiscoverypersistenceprivilege_escalation

Malware Config

Targets

    • Target
      PartAssist.exe
    • Size 57.8MB
    • SHA256 39bf111c8fbfd9f6f7980ed6d68c67b51f1ef58279de4caa9c14fa822b83c4e4
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    aspackv2bootkitdefense_evasiondiscoverypersistenceprivilege_escalation

    • Modifies Windows Firewall

      defense_evasion

    • Sets service image path in registry

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

      persistence

    • Uses Session Manager for persistence

      Creates Session Manager registry key to run executable early in system boot.

      persistence

    • ASPack v2.12-2.42

      Detects executables packed with ASPack v2.12-2.42

      aspackv2

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Drops desktop.ini file(s)

    • 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

    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

2
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks