Snifie
Overview
Executive Summary
Snifie 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).Infection Vector and Technical Capabilities
Because 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. Once executed with elevated privileges, Snifie performs deep packet inspection:- Promiscuous Mode: 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.
- Protocol Parsing: 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.
- Silent Exfiltration: 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.
Threat Assessment
A 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.Incident Response and Remediation
- Network Segmentation and Isolation: 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.
- Credential Reset and Protocol Audit: 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.
- Endpoint Eradication: 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.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
This family has been observed using the following ATT&CK techniques: T1040 T1056 T1048
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1056: Monitor for unauthorized keylogging, screen capturing, or web browser API hooking. Deploy EDR to detect API hooking.
Generated Detections (Boilerplate)
These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.
YARA Rule
rule MALWARE_WIN_SNIFIE {
meta:
description = "Detects Snifie (advanced_threat)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "snifie" ascii wide nocase
$s2 = "trojan.sniffer.snifie" ascii wide nocase
$s3 = "spyware.snifie" ascii wide nocase
$s4 = "win32/snifie" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Snifie Activity
id: 245f496505f7effc9455142614a96e8d
status: experimental
description: Detects generic indicators of the snifie malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*snifie*"
- "*trojan.sniffer.snifie*"
- "*spyware.snifie*"
- "*win32/snifie*"
condition: selection
level: mediumReferences & External Analysis
- Search "snifie" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Snifie Advanced_Threat from Windows?
Manual removal of Snifie is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Snifie a virus or a Advanced_Threat?
Snifie is classified as a Advanced_Threat. Unlike traditional viruses that infect files, modern malware like Snifie typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Snifie infection?
Symptoms of Snifie can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Related Families (Category: advanced_threat)
Explore other malware families in the same category:
Protect Your Network Against Advanced_Threats
Want to prevent Snifie and similar threats from compromising your organization? Read our comprehensive defensive guide: Suspect an Infection? What to do.
Machine-readable
Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/snifie.json
Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.