Overview

overview

10

Static

static

1

avast_prem...up.exe

windows10-ltsc_2021-x64

10

avast_prem...up.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    avast_premium_security_offline_setup.exe
  • Size 902.1MB
  • Sample260831-bb4e7asglg
  • SHA256 cb50e861b98384fbe99415a430b2561a01fd9d05170e2d6b62fe003e56fb4e0b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwarebootkitdefense_evasiondiscoverypersistenceprivilege_escalationspywarestealertrojan

Malware Config

Targets

    • Target
      avast_premium_security_offline_setup.exe
    • Size 902.1MB
    • SHA256 cb50e861b98384fbe99415a430b2561a01fd9d05170e2d6b62fe003e56fb4e0b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    adwarebootkitdefense_evasiondiscoverypersistenceprivilege_escalationspywarestealertrojan

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Drops file in Drivers directory

    • 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

    • Impair Defenses: Safe Mode Boot

      defense_evasion

    • Windows security modification

      defense_evasiontrojan

    • Adds Run key to start application

      persistence

    • Checks for any installed AV software in registry

    • Writes to the Master Boot Record (MBR)

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

      bootkitpersistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops file in System32 directory

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

      persistenceprivilege_escalation
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Safe Mode Boot

1
T1562.009

Modify Registry

5
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

5
T1012

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks