{
  "family": "ircnite",
  "sample_count": 4,
  "category": "trojan",
  "description": "Backdoor:Win32/Ircnite (often associated with older, legacy botnets) is a trojan that infects a system and connects it to a clandestine Internet Relay Chat (IRC) server to receive commands from a botmaster. While IRC botnets are considered 'old-school' compared to modern HTTP/HTTPS C2 infrastructure, they remain highly effective for orchestrating massive Distributed Denial of Service (DDoS) attacks and coordinating simple malware deployments.<br><br><b>Understanding Ircnite (IRC Botnets)</b><br>To an end-user, an Ircnite infection is typically invisible, unless the machine is actively participating in a DDoS attack, which would cause severe network sluggishness. For a security analyst, detecting IRC traffic (port 6667) originating from a standard user workstation—especially if the organization does not legitimately use IRC for communication—is an immediate, glaring indicator of compromise.<br><br><b>Execution and Command Mechanics</b><br>Ircnite is traditionally distributed via unpatched software vulnerabilities, malicious email attachments, or peer-to-peer (P2P) file sharing (`T1189`). Upon execution, the malware establishes persistence via the Registry Run keys (`T1547.001`). The core of the backdoor is an embedded IRC client. It silently connects to a hardcoded IRC server and joins a specific, hidden channel (`T1071.002`). The botmaster issues commands directly into the chat channel, which all connected bots (zombies) instantly execute. These commands typically include instructions to launch SYN floods or UDP floods against a target (`T1498`), download and execute further malware modules (`T1105`), or scan the local subnet for vulnerable machines (`T1046`).<br><br><b>Indicators of Compromise & Impact</b><br>The primary impact is the enlistment of the host into a DDoS botnet, potentially exposing the organization's IP to blacklisting. Host-based IoCs are standard registry persistence mechanisms. Network IoCs are the most obvious: persistent, unencrypted outbound TCP connections on port 6667 (or non-standard ports configured for IRC) containing cleartext IRC protocol commands (e.g., `NICK`, `JOIN`, `PRIVMSG`) directed at unknown external servers.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Ircnite and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Ircnite is classified as a Trojan. 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 Ircnite establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Ircnite 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 Ircnite compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Ircnite 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 secondary payloads and staging behaviors are commonly associated with Ircnite?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Ircnite frequently operates as a loader or dropper designed to establish a foothold before downloading and executing secondary high-impact malware payloads. Depending on the threat actor's objectives, these dropped modules can range from ransomware and banking injects to modular infostealers and remote management backdoors."
      }
    },
    {
      "@type": "Question",
      "name": "How can security operations teams effectively detect and hunt for Ircnite across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Ircnite by deploying behavioral endpoint detection and response (EDR) rules that monitor suspicious process spawning (such as cmd.exe or powershell.exe spawned from office documents or temporary directories), anomalous outbound network connections from non-browser binaries, and unauthorized modifications to Windows Run keys and scheduled task registries."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1498",
    "T1105",
    "T1547.001",
    "T1071.002"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1071.002",
      "name": "Application Layer Protocol: File Transfer Protocol (and IRC)",
      "tactic": "Command and Control"
    },
    {
      "id": "T1498",
      "name": "Network Denial of Service (Launching DDoS attacks via IRC commands)",
      "tactic": "Impact"
    },
    {
      "id": "T1547.001",
      "name": "Boot or Logon Autostart Execution",
      "tactic": "Persistence"
    },
    {
      "id": "T1105",
      "name": "Ingress Tool Transfer (Downloading further payloads)",
      "tactic": "Command and Control"
    }
  ],
  "containment_steps": [
    "Immediately isolate the endpoint from the network to sever the IRC connection and stop the machine's participation in ongoing DDoS attacks.",
    "Implement strict egress filtering at the corporate firewall to block outbound IRC traffic (TCP port 6667) and other non-standard ports not required for business operations.",
    "Analyze network packet captures (PCAP) of the IRC traffic to identify the C2 server IP address, the IRC channel name, and potentially the commands being issued by the botmaster.",
    "Run a full anti-malware scan to remove the Ircnite executable and its registry persistence."
  ],
  "what_to_avoid": [
    "Do not assume that because IRC is an 'old' protocol, the malware is not dangerous; IRC botnets are still highly effective for launching devastating volumetric DDoS attacks.",
    "Avoid relying solely on port blocking (e.g., blocking 6667); modern IRC bots can be configured to communicate over port 80 or 443, requiring Layer 7 (application-aware) inspection to detect the IRC protocol."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}