{
  "family": "keylogr",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\n\"Keylogr\" is a generic detection name used by security engines to identify software that exhibits the behavioral characteristics of a keystroke logger. Whether it is a commercial \"employee monitoring\" tool (Riskware) or a malicious, custom-built Info Stealer (Trojan), its primary function is to silently record every keystroke made by the user, posing a critical threat to credential security and data confidentiality.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nMalicious keyloggers are typically deployed via targeted spear-phishing (malicious attachments), drive-by downloads, or dropped by initial access brokers who have compromised a system. Commercial (Riskware) keyloggers must be installed manually by someone with physical access or administrative rights.\n\nRegardless of the source, Keylogr variants utilize deep system monitoring:\n<ul>\n<li><strong>API Hooking:</strong> The most common technique involves hooking core Windows APIs (such as `SetWindowsHookEx` or `GetAsyncKeyState`). This allows the software to intercept hardware interrupts from the keyboard before the keystrokes are passed to the active application.</li>\n<li><strong>Kernel-Level Logging:</strong> More advanced variants operate as kernel-mode rootkits, intercepting keystrokes at the driver level (`kbdclass.sys`). This makes them completely invisible to user-mode security software and the Windows Task Manager.</li>\n<li><strong>Data Exfiltration:</strong> The captured keystrokes (which inevitably include passwords, emails, and sensitive communications) are saved to hidden, encrypted log files. These logs are then periodically exfiltrated to the attacker via SMTP, FTP, or HTTP POST requests.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nThe detection of a Keylogr is a critical security incident. It guarantees the compromise of any password or sensitive data typed on the infected machine. This provides attackers with the credentials necessary to escalate privileges, access corporate VPNs, and pivot laterally across the network.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Immediate Network Isolation:</strong> The highest priority is to disconnect the infected endpoint from the network to halt the active exfiltration of the keystroke logs.</li>\n<li><strong>Global Credential Reset:</strong> It must be assumed that *all* passwords typed on the machine have been stolen. A mandatory, immediate reset of all associated enterprise credentials is required.</li>\n<li><strong>Complete Re-imaging:</strong> Due to the deep system hooking (often at the kernel level) used by keyloggers, attempting to \"clean\" the machine manually is highly risky and often ineffective. A complete bare-metal wipe and re-image from a trusted baseline is necessary.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Keylogger",
    "Spyware.Keylog",
    "Riskware.Monitor"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Keylogr and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Keylogr 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 Keylogr establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Keylogr 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 Keylogr compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Keylogr 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 Trojan.Keylogger?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Trojan.Keylogger 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 Trojan.Keylogger across enterprise endpoints?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Defenders should hunt for Trojan.Keylogger 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": [
    "T1056.001",
    "T1115",
    "T1552.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Spyware / Keylogger",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "mitre_attack_detail": [
    {
      "id": "T1056.001",
      "name": "Keylogging",
      "tactic": "Credential Access"
    },
    {
      "id": "T1115",
      "name": "Clipboard Data",
      "tactic": "Collection"
    },
    {
      "id": "T1552.001",
      "name": "Credentials In Files (Harvesting passwords and wallets from local storage)",
      "tactic": "Credential Access"
    }
  ],
  "containment_steps": [
    "Sever network connectivity for the flagged endpoint to terminate persistent command-and-control (C2) communication channels and stop Keylogr from retrieving secondary stage payloads.",
    "Capture process memory triage to detect and terminate malicious threads injected by Keylogr into legitimate system processes such as explorer.exe or svchost.exe.",
    "Audit Windows Registry Run keys (HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run) and Task Scheduler entries to locate and purge Keylogr persistence hooks.",
    "Deploy updated enterprise EDR detection signatures and conduct an out-of-band endpoint scan to isolate dropped binaries and staged payloads.",
    "Rotate all credentials, domain user passwords, and session cookies active on the system during the Keylogr execution timeframe."
  ],
  "what_to_avoid": [
    "Do not assume the incident is resolved simply because an antivirus tool removed the initial Keylogr dropper; always verify that secondary payloads and persistence hooks have been eradicated.",
    "Avoid logging in with Domain Admin or privileged credentials on a machine suspected of running Keylogr until memory triage is complete.",
    "Do not delay host isolation; automated lateral movement and credential dumping can occur within minutes of initial execution."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}