{
  "family": "sign0fmisery",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nSign0fmisery is a classification typically assigned to a specific HackTool or highly destructive Trojan framework. It is designed to aggressively disrupt system operations, corrupt data, or facilitate unauthorized remote access for an attacker. The dramatic naming convention often suggests a \"Joke\" program or a rudimentary destructive payload (like a wiper), but in an enterprise context, it must be treated as a severe security incident.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nMalware in this category is frequently distributed via peer-to-peer (P2P) networks, disguised within cracked software installers, or deployed directly by an attacker who has already achieved initial access via brute-force (RDP/SMB) or exploiting a public-facing vulnerability.\n\nUpon execution, Sign0fmisery prioritizes system disruption over stealth:\n<ul>\n<li><strong>Destructive Payload:</strong> Depending on the specific variant, the primary payload may involve mass file deletion, overwriting the Master Boot Record (MBR) to prevent the OS from booting, or forcefully terminating critical Windows services (like the Print Spooler or Windows Defender).</li>\n<li><strong>System Instability:</strong> The malware often induces severe system instability, triggering Blue Screens of Death (BSODs) or freezing the user interface by launching infinite loops or consuming all available CPU and RAM resources.</li>\n<li><strong>Backdoor Functionality:</strong> Some variants classified under this name also open undocumented network ports, establishing a rudimentary backdoor that allows the attacker to execute remote command-line instructions.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Sign0fmisery infection is a high-severity event resulting in immediate denial of service and potential data loss. Even if the payload is poorly written or deemed \"amateur,\" its presence indicates a complete failure of endpoint execution controls and user awareness training.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Emergency Network Isolation:</strong> Isolate the machine immediately to prevent the malware from attempting to spread laterally via open network shares or exploiting vulnerabilities on adjacent systems.</li>\n<li><strong>System Triage and Data Recovery:</strong> Because the primary intent is often destructive, attempting to \"clean\" the OS is not recommended. The system should be booted from an offline rescue environment to assess data damage and attempt file recovery before a complete wipe.</li>\n<li><strong>Complete Re-imaging:</strong> The only secure remediation is a bare-metal wipe and re-image from a trusted backup. Thoroughly investigate the initial infection vector to patch the vulnerability or address the social engineering tactic that allowed the execution.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Sign0fmisery",
    "HackTool.Sign0fmisery",
    "Win32/Sign0fmisery"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1485",
    "T1489",
    "T1490"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T17:33:16Z",
  "type": "Trojan / HackTool",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}