{
  "family": "freekeylogger",
  "sample_count": 16,
  "category": "advanced_threat",
  "description": "Spyware:Win32/Freekeylogger (or HackTool:Win32/Keylogger) is a classification representing commercially available, dual-use keystroke logging software. While marketed for 'employee monitoring' or 'parental control,' these tools are routinely weaponized by attackers, insiders, and domestic abusers to silently harvest credentials, emails, and sensitive communications.<br><br><b>Understanding Freekeylogger</b><br>To the victim, a Freekeylogger infection is entirely invisible. There are no UI prompts, and the software actively hides itself from the Task Manager and Add/Remove Programs list. For a security analyst, a keylogger represents a critical, ongoing credential compromise event. Because these are often commercial tools, they do not rely on zero-day exploits; they abuse legitimate Windows APIs to establish deep, persistent monitoring capabilities over the infected endpoint.<br><br><b>Execution and Keylogging Mechanics</b><br>Freekeylogger software must be installed by an entity with local administrative privileges (an insider threat, an abusive partner, or an attacker who has already escalated privileges). During installation, the software intentionally configures itself to evade detection (`T1562.001`), adding exclusions to Windows Defender. It establishes persistence via hidden registry keys or as a background service (`T1543.003`). The core functionality relies on interacting with the Windows API—specifically utilizing `SetWindowsHookEx` (`T1056.001`) to install a global keyboard hook, intercepting all keystrokes before they reach the intended application. The captured text is written to a hidden, encrypted log file and periodically exfiltrated via email (SMTP), FTP, or a vendor-provided cloud dashboard (`T1041`).<br><br><b>Indicators of Compromise & Impact</b><br>The impact is the total compromise of all credentials and sensitive information typed on the infected machine. EDR platforms must alert on processes aggressively utilizing hooking APIs (`SetWindowsHookEx`) or anomalous processes writing hidden log files. Network logs may reveal periodic outbound connections to the vendor's cloud service or anomalous SMTP traffic originating from the endpoint.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1562.001",
    "T1056.001",
    "T1543.003",
    "T1041",
    "T1112"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1056.001",
      "name": "Input Capture: Keylogging",
      "tactic": "Credential Access"
    },
    {
      "id": "T1543.003",
      "name": "Create or Modify System Process: Windows Service",
      "tactic": "Persistence"
    },
    {
      "id": "T1041",
      "name": "Exfiltration Over C2 Channel",
      "tactic": "Exfiltration"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1112",
      "name": "Modify Registry",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Instantly isolate the endpoint from the network to halt the exfiltration of the captured keystroke logs via email or cloud sync.",
    "Assume all passwords typed on the machine (corporate, personal, financial) are compromised. Initiate mandatory password resets from a known-clean device.",
    "Verify with HR and Legal if the software is an authorized component of an insider threat monitoring program before taking destructive action.",
    "Perform a clean OS rebuild; commercial keyloggers hook deeply into the system, and manual removal often leaves persistent components behind."
  ],
  "what_to_avoid": [
    "Do not allow the user to log into any systems (even to change their password) on the infected machine, as the new password will also be logged.",
    "Avoid assuming the incident is a minor policy violation; the exfiltrated logs may contain highly sensitive corporate IP or regulatory compliance data."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}