{
  "family": "peflog",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nPeflog (PE File Logger) is a classification for a specific type of Information Stealer (Info-Stealer) focused primarily on monitoring system activity and exfiltrating data. Unlike broader banking trojans, Peflog is designed for targeted espionage, quietly logging keystrokes, capturing screenshots, and aggressively searching the filesystem for specific file types (often source code, documents, or cryptographic keys).\n\n<h3>Infection Vector and Technical Capabilities</h3>\nPeflog is typically distributed via spear-phishing campaigns targeting specific individuals or organizations, or it is dropped as a secondary payload by an initial access broker.\n\nUpon execution, it performs a highly aggressive, targeted data harvesting operation:\n<ul>\n<li><strong>Comprehensive Keylogging:</strong> Peflog utilizes advanced API hooking (often `SetWindowsHookEx`) to capture all keystrokes across all applications. This is designed to capture passwords as they are typed, bypassing browser-based password managers or credential vaults.</li>\n<li><strong>Targeted File Exfiltration:</strong> The malware continuously scans the local hard drive and mapped network shares for specific file extensions (e.g., `.doc`, `.xls`, `.pdf`, `.key`, `.pem`). It packages these files into hidden, encrypted archives for exfiltration.</li>\n<li><strong>System Profiling and Exfiltration:</strong> It collects extensive system details and periodically takes desktop screenshots to monitor user activity. All stolen data is typically exfiltrated via HTTP POST requests or FTP uploads to an attacker-controlled drop server.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Peflog infection is a critical data breach and espionage incident. The malware is designed to operate silently over long periods, continuously bleeding sensitive intellectual property, strategic documents, and user credentials out of the network.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Immediate Network Isolation:</strong> The highest priority is to physically disconnect the infected machine from the network to halt the active exfiltration of data and prevent the malware from capturing further credentials.</li>\n<li><strong>Global Credential Reset:</strong> Because of the pervasive keylogging capabilities, ALL credentials used on that machine—including domain admin passwords, web app logins, and VPN tokens—must be considered compromised and reset immediately.</li>\n<li><strong>Endpoint Eradication:</strong> The extent of the data breach and the likelihood of advanced persistence mechanisms necessitate a full forensic review. Re-imaging the machine from a trusted baseline is required to ensure complete eradication.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Peflog",
    "PWS.Peflog",
    "TrojanSpy.Peflog"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1056.001",
    "T1119",
    "T1048",
    "T1113"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-02T06:43:01Z",
  "type": "Information Stealer / Keylogger",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}