Sennaonemaker
Table of Contents
Overview
Executive Summary
SennaOneMaker is a prolific adware family and Potentially Unwanted Program (PUP) notorious for bombarding infected systems with intrusive pop-up advertisements, banners, and in-text links. It operates primarily as a monetization vehicle for its developers, aggressively altering system states to maximize ad delivery.Infection and Execution Flow
SennaOneMaker relies on social engineering and software bundling for distribution. Users typically infect their systems inadvertently when downloading software from third-party aggregators or torrent sites. Upon installation, SennaOneMaker executes silently, dropping executable files into the `%AppData%` and `%ProgramFiles%` directories. It immediately hooks into active browser processes and alters DNS configurations or proxy settings in some variants to route traffic through servers controlled by the attackers. This allows the adware to inject advertisements directly into the HTML of non-encrypted (HTTP) websites and manipulate search results. The constant network activity and background processing required to fetch and render these ads severely impact system performance.Privacy and Threat Implications
SennaOneMaker acts as a persistent surveillance tool, gathering vast amounts of user data, including browsing habits, search queries, and geographical locations. This telemetry is transmitted to remote servers and sold. The sheer volume of injected ads also creates a high probability of "malvertising" exposure, where users may be tricked into downloading ransomware or credential stealers.Defense and Remediation
- Web Filtering: Implement DNS-level filtering or Secure Web Gateways (SWG) to block access to known adware distribution networks and C2 servers.
- Registry Cleanup: SennaOneMaker leaves extensive registry footprints. Manual or automated cleanup of `HKCU\Software\Microsoft\Windows\CurrentVersion\Run` and browser policy keys is essential for complete removal.
- Continuous Monitoring: Monitor network traffic for anomalous outbound connections indicative of adware phoning home to ad networks.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:
| Technique | Name | Tactic | Official Spec |
|---|---|---|---|
T1566.002 | Phishing: Spearphishing Link (Social engineering to force the user to download the tool) | Initial Access | ATT&CK ↗ |
T1112 | Modify Registry | Defense Evasion | ATT&CK ↗ |
T1562 | Impair Defenses (Suspicious API calls) | Defense Evasion | ATT&CK ↗ |
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1566.002: Inspect email links for known malicious domains and use link-rewriting services for time-of-click analysis.
MITRE D3FEND™ Defensive Countermeasures
Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):
| D3FEND ID | Countermeasure Name | Tactic | Countered ATT&CK | Defensive Guidance |
|---|---|---|---|---|
D3-RVM | Registry Value Modification Analysis | Detect | T1112 | Log Windows Event ID 4657 to monitor unauthorized modifications to system configuration and security settings. |
D3-STA | Security Tool Anti-Tamper Enforcement | Harden | T1562 | Enable EDR Tamper Protection and Windows Defender Protected Process Light (PPL) to prevent service termination. |
D3-URLR | URL Rewriting & Time-of-Click Inspection | Filter | T1566.002 | Rewrite all external email links to force real-time URL reputation and DNS resolution at click time. |
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:
Tier 1 Primitive Artifact Rule (Fast Triage)
Matches raw strings and file markers. Vulnerable to binary repacking and simple obfuscation.
rule MALWARE_WIN_SENNAONEMAKER_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Sennaonemaker"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "sennaonemaker" ascii wide nocase
$s2 = "adware.sennaonemaker" ascii wide nocase
$s3 = "pup.sennaonemaker" ascii wide nocase
$s4 = "win32/sennaonemaker" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Tier 2 Behavioral Context Rule (Process Chains & Sigma)
Tracks parent-child process anomalies and suspicious scripting telemetry. Resilient against file renames.
title: SystemHelpDesk Detection - Sennaonemaker (Ransomware) Execution & Triage
id: 72d25dcf-baab-59ad-9311-ad3903f4b50c
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Sennaonemaker malware family. Detects volume shadow copy deletion, boot
status tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/sennaonemaker
- 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.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1566_002
- attack.t1112
- attack.t1562
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \vssadmin.exe
- \wmic.exe
- \wbadmin.exe
- \bcdedit.exe
CommandLine|contains:
- delete shadows
- shadowcopy delete
- resize shadowstorage
- recoveryenabled no
- ignoreallfailures
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: criticalTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_SENNAONEMAKER_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Sennaonemaker 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 = "sennaonemaker" 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.
- Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Sennaonemaker from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.
- Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Sennaonemaker symmetric encryption keys or uncompiled payload components may still reside in memory.
- Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Sennaonemaker to inhibit recovery.
- Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.
- Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Sennaonemaker binary and related persistence hooks are eradicated.
What to Avoid
Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.
- Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Sennaonemaker.
- Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.
- Do not connect clean backup drives or external storage to the affected network until Sennaonemaker eradication is completely verified.
References & External Analysis
- Search "sennaonemaker" on VirusTotal (External Analysis)
- Search "sennaonemaker" on Any.Run (Sandbox Sandbox)
- Search "sennaonemaker" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Sennaonemaker and what threat category does it belong to?
Sennaonemaker is classified as a Ransomware. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments.
How does Sennaonemaker establish persistence and evade defensive controls?
Sennaonemaker typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks.
What are the essential incident response steps for mitigating a Sennaonemaker compromise?
Security teams responding to Sennaonemaker should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups.
What cryptographic algorithms and file targeting techniques does Adware.SennaOneMaker employ during execution?
Adware.SennaOneMaker typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options.
Are decryptors available for Adware.SennaOneMaker, and what is the recommended recovery procedure?
Decryption availability for Adware.SennaOneMaker depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups.
How do I remove the Sennaonemaker Ransomware from Windows?
Manual removal of Sennaonemaker is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Sennaonemaker a virus or a Ransomware?
Sennaonemaker is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Sennaonemaker typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Sennaonemaker infection?
Symptoms of Sennaonemaker can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Protect Your Network Against Ransomwares
Want to prevent Sennaonemaker and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Containment & Incident Response.
📣 Threat Intel Correction or Update?
Notice an outdated IOC, unlisted alias, or disputed attribution? Threat researchers are invited to propose an update on GitHub or contact the SystemHelpDesk research desk. All community revisions are credited in our public CHANGELOG.
Machine-readable
Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/sennaonemaker.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.