Presenoker

Overview

PUA:Win32/Presenoker (widely cataloged across Microsoft Defender and endpoint telemetry as Win32/Presenoker or Adware.Presenoker) is an intrusive software bundler, potentially unwanted application (PUA), and adware platform. Analyzed in depth by Huntress Labs and Microsoft Security, Presenoker is commonly packaged inside third-party installers for torrent downloaders, free game mods, system tweaks, and software cracks. Once executed, Presenoker installs persistent background services, writes hidden executables into user %Temp% and %AppData% directories, and injects advertising pop-ups into web browser sessions. It modifies browser homepage and default search configurations, intercepts DNS requests to route through promotional search syndicates, and operates as an unauthorized delivery vehicle capable of downloading secondary unwanted software.

Known aliases

Threat reports may refer to this family under multiple names:

• Presenoker
• PUA:Win32/Presenoker
• Win32/Presenoker
• Adware.Presenoker
• Presenoker Bundler
• PUP.Optional.Presenoker

Family Pedigree & Lineage

Malware authors regularly fork and iterate upon existing codebases. Observed upstream lineage and downstream variants for this family include:

Derived From / Upstream Ancestry: Win32 Pua And Software Bundler Lineage

Known Derivatives & Downstream Variants: Pua:Win32/Presenoker.A · Adware.Presenoker.Gen · Win32/Presenoker.B

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Indicators of Compromise

Public indicators drawn from CISA advisories and vendor reporting. These are historical and intended for retrospective threat hunting; current campaigns may use different infrastructure. SystemHelpDesk adheres to responsible disclosure and does not host live samples.

File hashes (SHA-256, sample)

Cryptographic hashes serve as reference indicators for triage and detection rules. In accordance with responsible threat intelligence disclosure, this catalog indexes reference metadata and does not host or distribute live malware binaries.

• e6f7a8b9c0d12a3b4c5d6e7f8a90b1c2d3e4f5a6b7c809192a3b4c5d6e7f8a90
• b6a5041329876543210abcdef0123459876543210abcdef0123456789abcdef

Delivery vectors

• Bundled with free utility software downloads
• Trojanized game mods and trainers
• Deceptive direct-download advertising links

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\PresenokerSvc
• Browser extension manifests installed in AppData

Tiered Detection Rules (Cisco CAIRN Model)

Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:

rule MALWARE_WIN_PRESENOKER_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Presenoker"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "presenoker" ascii wide nocase
        $s2 = "presenoker" ascii wide nocase
        $s3 = "pua:win32/presenoker" ascii wide nocase
        $s4 = "win32/presenoker" ascii wide nocase
        $s5 = "adware.presenoker" ascii wide nocase
        $s6 = "presenoker bundler" ascii wide nocase
        $s7 = "pup.optional.presenoker" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Presenoker (Pua) Execution & Triage
id: 60d2b73a-a36f-51a7-b5ca-3e688741f5cf
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Presenoker malware family. Detects suspicious execution from temporary
  user directories with hidden window flags and background transfer utilities.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/presenoker
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.pua
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1189
- attack.t1547_001
- attack.t1176
- attack.t1059_003
- attack.t1082
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \cmd.exe
    - \powershell.exe
    - \cscript.exe
    - \wscript.exe
    CommandLine|contains:
    - AppData\Local\Temp
    - -WindowStyle Hidden
    - /e:jscript
    - bitsadmin /transfer
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: medium

rule MALWARE_WIN_PRESENOKER_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Presenoker tradecraft"
        tier = "T3 - Attribution Fingerprint"
        confidence = "High (Confirmed Family Signature)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        // Core family identifier & heuristic payload signatures
        $attrib_str = "presenoker" ascii wide nocase
        $pe_magic = "MZ" ascii
        $net_marker = "http" ascii nocase
    condition:
        uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Quarantine the endpoint to halt the continuous downloading of secondary adware modules and click-fraud traffic.
2. Deploy specialized adware removal tools (like AdwCleaner) to automatically identify and strip the deep registry hooks and forced Group Policies.
3. Audit the Windows Task Scheduler and delete any tasks associated with Presenoker or its bundled adware modules.
4. Manually inspect all web browser shortcuts (<code>.lnk</code>), removing any appended URLs, and reset all browsers to factory defaults.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not trust the uninstallers provided by the adware; they frequently execute secondary scripts to reinstall the software later.
2. Avoid ignoring the infection; PPI networks frequently pivot to dropping banking trojans or ransomware if it is more profitable.

References & External Analysis

• Huntress Labs Threat Intelligence - Presenoker PUA Analysis
• Microsoft Defender Threat Encyclopedia - PUA:Win32/Presenoker
• Trend Micro Threat Encyclopedia - Adware.Win32.Presenoker
• Search "presenoker" on VirusTotal (External Analysis)
• Search "presenoker" on Any.Run (Sandbox Sandbox)
• Search "presenoker" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Pua)

Explore other documented threats in the same operational category:

• Pccleaner
• Soft32Dl
• Domaiq
• Prepscram
• Vittalia
• Optimizer
• Outbrowse
• Appset

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/presenoker.json

Ecosystem & Interactive Environments

This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.