Snifula
Overview
Executive Summary
Snifula is a specialized information-stealing Trojan (Info Stealer) that focuses primarily on intercepting and extracting credentials and financial data as they transit the network or are entered into specific applications. Unlike massive, multi-function botnets, Snifula acts as a targeted surveillance tool, silently capturing login details, banking sessions, and FTP credentials to facilitate immediate financial fraud or deep network compromise.Infection Vector and Technical Capabilities
Snifula is typically distributed via targeted spear-phishing campaigns (often disguised as urgent invoices or shipping documents) or silently deployed as a secondary payload by exploit kits hosted on compromised websites. Once active, Snifula employs precise data harvesting techniques:- Network Sniffing and Man-in-the-Browser (MitB): Advanced variants of Snifula can inject code into web browsers (API hooking) to intercept data *before* it is encrypted via HTTPS. This allows the attacker to capture passwords entered into web forms in plaintext.
- Form Grabbing and Keylogging: It actively monitors active windows, employing keylogging when the user interacts with specific targeted applications (like banking portals, email clients, or VPN login screens).
- Credential Store Extraction: The trojan systematically extracts saved passwords, cookies, and session tokens directly from the local credential stores of popular web browsers (Chrome, Firefox, Edge).
Threat Assessment
A Snifula infection is a critical security incident prioritizing data theft. The immediate risk is financial fraud if banking credentials are stolen. The secondary, often more severe risk, is the theft of corporate VPN or RDP credentials, which allows the attacker (or an Initial Access Broker who purchases the data) to bypass perimeter defenses and establish a permanent foothold.Incident Response and Remediation
- Immediate Network Isolation: The highest priority is to isolate the endpoint to halt the active exfiltration of captured credentials and network traffic logs.
- Global Credential Reset: It must be assumed that all passwords entered on or stored within the compromised machine have been stolen. A mandatory, global reset of all associated credentials (including MFA tokens if session cookies were stolen) is absolutely required.
- Complete Re-imaging: Due to the deep system hooking required for Man-in-the-Browser attacks, attempting to clean the infection is insufficient. The endpoint must undergo a complete bare-metal wipe and re-image from a trusted baseline.
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: T1056.001 T1056.004 T1552.001 T1114
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1056.001: Implement Endpoint Detection and Response (EDR) to monitor for suspicious API calls related to keystroke interception. Enforce Multi-Factor Authentication (MFA) to render stolen passwords useless.
- T1056.004: 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_SNIFULA {
meta:
description = "Detects Snifula (banking_trojan)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "snifula" ascii wide nocase
$s2 = "trojan.snifula" ascii wide nocase
$s3 = "spyware.snifula" ascii wide nocase
$s4 = "win32/infostealer.snifula" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Snifula Activity
id: b52e96bc72b1e3e8cef8d2515c087529
status: experimental
description: Detects generic indicators of the snifula malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*snifula*"
- "*trojan.snifula*"
- "*spyware.snifula*"
- "*win32/infostealer.snifula*"
condition: selection
level: mediumReferences & External Analysis
- Search "snifula" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Snifula Banking_Trojan from Windows?
Manual removal of Snifula 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 Snifula a virus or a Banking_Trojan?
Snifula is classified as a Banking_Trojan. Unlike traditional viruses that infect files, modern malware like Snifula typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Snifula infection?
Symptoms of Snifula 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: banking_trojan)
Explore other malware families in the same category:
Protect Your Network Against Banking_Trojans
Want to prevent Snifula and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/snifula.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.