{
  "family": "snifie",
  "sample_count": 1,
  "category": "advanced_threat",
  "description": "<h3>Executive Summary</h3>\nSnifie is a specialized Information Stealer and Network Sniffer. Unlike standard info-stealers that rely on extracting passwords from local files (like browser databases), Snifie's primary objective is to silently monitor local network interfaces. It captures and parses raw network traffic (packet sniffing) to intercept unencrypted passwords, FTP credentials, and sensitive data transmitted over the local area network (LAN).\n\n<h3>Infection Vector and Technical Capabilities</h3>\nBecause it requires administrative privileges to interact directly with network interface cards (NICs), Snifie is typically deployed post-compromise. Threat actors install it after gaining initial access via RDP brute-forcing, exploiting unpatched vulnerabilities, or through the lateral movement phase of an attack.\n\nOnce executed with elevated privileges, Snifie performs deep packet inspection:\n<ul>\n<li><strong>Promiscuous Mode:</strong> The malware attempts to place the host's network adapter into \"promiscuous mode,\" allowing it to capture all traffic passing through that network segment, not just traffic destined for the infected machine itself.</li>\n<li><strong>Protocol Parsing:</strong> Snifie is specifically coded to parse common, unencrypted protocols such as HTTP (looking for `POST` data containing login forms), FTP, Telnet, POP3, and IMAP, extracting usernames and passwords in real-time.</li>\n<li><strong>Silent Exfiltration:</strong> The captured credentials are saved to a hidden log file (often obfuscated or encrypted) and periodically transmitted to the attacker's Command and Control (C2) server.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Snifie infection is a critical security incident that threatens the entire local network segment. If deployed on a central server or a machine connected to a highly trafficked switch, it can passively harvest administrative credentials for the entire domain without triggering standard endpoint alarms.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Network Segmentation and Isolation:</strong> Immediately isolate the infected machine. Due to the nature of a sniffer, you must assume that any unencrypted traffic that traversed that network segment while the malware was active has been compromised.</li>\n<li><strong>Credential Reset and Protocol Audit:</strong> Mandate a reset of all credentials. More importantly, this incident highlights a severe architectural flaw: the use of cleartext protocols. An immediate audit must be conducted to deprecate FTP/Telnet in favor of SFTP/SSH, and enforce HTTPS for all internal applications.</li>\n<li><strong>Endpoint Eradication:</strong> Utilize enterprise EDR to locate and terminate the Snifie process and any associated packet capture drivers (e.g., rogue WinPcap installations) it may have deployed.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Sniffer.Snifie",
    "Spyware.Snifie",
    "Win32/Snifie"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Snifie and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Snifie is classified as a Advanced Threat. 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 Snifie establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Snifie 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 Snifie compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Snifie 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 lateral movement and credential access tactics does Trojan.Sniffer.Snifie leverage in enterprise intrusions?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Trojan.Sniffer.Snifie frequently utilizes privileged account harvesting techniques such as LSASS memory dumping, Kerberoasting, and token impersonation to escalate privileges. Once administrative credentials are acquired, it pivots across the victim network utilizing living-off-the-land binaries (LOLBins) such as WMI, PowerShell remoting, and PsExec, or abuses remote desktop protocols (RDP) to reach critical internal repositories and domain controllers."
      }
    },
    {
      "@type": "Question",
      "name": "How does Trojan.Sniffer.Snifie maintain covert communications and evade perimeter network monitoring?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Trojan.Sniffer.Snifie often relies on multi-stage command and control (C2) architectures utilizing encrypted protocols over standard web ports (HTTPS/443 or DNS tunneling) to blend in with legitimate enterprise network traffic. Many variants incorporate proxy networks, domain fronting, or cloud services (such as Microsoft Graph API, Google Drive, or Telegram) to masquerade C2 channels, bypassing traditional signature-based egress filtering."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1040",
    "T1056",
    "T1048"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Info-Stealer / Network Sniffer",
  "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": "T1040",
      "name": "Network Sniffing (Stealing credentials in transit)",
      "tactic": "Credential Access"
    },
    {
      "id": "T1056",
      "name": "Input Capture",
      "tactic": "Credential Access"
    },
    {
      "id": "T1048",
      "name": "Exfiltration Over Alternative Protocol",
      "tactic": "Exfiltration"
    }
  ],
  "containment_steps": [
    "Enforce forensic network isolation on all suspected endpoints while maintaining an out-of-band telemetry conduit to capture live Snifie adversary activity.",
    "Perform full memory dumps across identified staging nodes to extract memory-only implants, kernel rootkit hooks, and decrypted Snifie C2 infrastructure IP/domain lists.",
    "Review Active Directory domain controller authentication logs for anomalous Kerberos ticket requests (Pass-the-Ticket, Golden Ticket) and unauthorized DCSync operations associated with Snifie.",
    "Block all confirmed C2 domains, dynamic DNS endpoints, and proxy IP addresses across perimeter firewalls, proxies, and DNS security gateways.",
    "Conduct an enterprise-wide sweep across surrounding subnets for secondary webshells, WMI event subscriptions, or remote execution tooling left behind by Snifie operators."
  ],
  "what_to_avoid": [
    "Do not assume the incident is resolved simply because an antivirus tool removed the initial Snifie 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 Snifie 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 Server 2022",
    "Windows Server 2019"
  ]
}