{ "family": "sennaonemaker", "sample_count": 1, "category": "ransomware", "description": "

Executive Summary

\nSennaOneMaker 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.\n\n

Infection and Execution Flow

\nSennaOneMaker 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. \n\nUpon 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.\n\n

Privacy and Threat Implications

\nSennaOneMaker 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.\n\n

Defense and Remediation

\n", "cta": "Published by the SystemHelpdesk team.", "aliases": [ "Adware.SennaOneMaker", "PUP.SennaOneMaker", "Win32/SennaOneMaker" ], "enrichment_level": "expert-seo", "faq": [ { "@type": "Question", "name": "What is Sennaonemaker and what threat category does it belong to?", "acceptedAnswer": { "@type": "Answer", "text": "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." } }, { "@type": "Question", "name": "How does Sennaonemaker establish persistence and evade defensive controls?", "acceptedAnswer": { "@type": "Answer", "text": "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." } }, { "@type": "Question", "name": "What are the essential incident response steps for mitigating a Sennaonemaker compromise?", "acceptedAnswer": { "@type": "Answer", "text": "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." } }, { "@type": "Question", "name": "What cryptographic algorithms and file targeting techniques does Adware.SennaOneMaker employ during execution?", "acceptedAnswer": { "@type": "Answer", "text": "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." } }, { "@type": "Question", "name": "Are decryptors available for Adware.SennaOneMaker, and what is the recommended recovery procedure?", "acceptedAnswer": { "@type": "Answer", "text": "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." } } ], "faq_count": 5, "mitre_attack": [ "T1566.002", "T1112", "T1562" ], "cisa_advisory": null, "last_updated": "2026-10-15", "type": "Adware", "target_industries": [ "Healthcare", "Critical Infrastructure", "Enterprise" ], "motivation": "Financial Extortion", "threat_actors": [ "Unknown / Cybercriminal" ], "target_geographies": [ "Global" ], "attack_stage": [ "defense_evasion", "impact" ], "ecosystem": [ "windows_pe" ], "is_emerging": false, "mitre_attack_detail": [ { "id": "T1566.002", "name": "Phishing: Spearphishing Link (Social engineering to force the user to download the tool)", "tactic": "Initial Access" }, { "id": "T1112", "name": "Modify Registry", "tactic": "Defense Evasion" }, { "id": "T1562", "name": "Impair Defenses (Suspicious API calls)", "tactic": "Defense Evasion" } ], "containment_steps": [ "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": [ "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." ], "target_platforms": [ "Windows 11", "Windows 10", "Windows Server 2022", "Windows Server 2019" ] }