Wswhacker
Overview
Executive Summary
Wswhacker is a classification assigned to a specific HackTool and dedicated Password Stealer. It is engineered to aggressively extract sensitive authentication data from a compromised Windows workstation, targeting saved credentials in web browsers, local email clients, and FTP software, before silently exfiltrating this intelligence to a remote attacker.Infection Vector and Technical Capabilities
Tools like Wswhacker are rarely distributed via automated exploit kits. They are typically deployed manually by a threat actor who has already gained initial access (e.g., via compromised RDP credentials or a reverse shell), or they are bundled within socially engineered, trojanized software packages on file-sharing sites. Once executed, Wswhacker is designed for rapid, noisy data extraction:- Browser and Client Hooking: The malware immediately targets the local storage databases (SQLite files) and registry keys associated with popular software. It extracts saved plaintext passwords and auto-fill data from Chrome, Firefox, Internet Explorer, Outlook, and FileZilla.
- SAM Database Extraction: Advanced variants may attempt to dump the Security Account Manager (SAM) database or utilize techniques like Mimikatz (LSASS memory dumping) to extract Windows NTLM hashes for offline cracking or pass-the-hash attacks.
- Automated Exfiltration: Because Info-stealers do not necessarily need to maintain long-term persistence, Wswhacker quickly bundles the stolen data into a `.txt` or `.zip` file and transmits it to the attacker, often utilizing simple SMTP (email) or FTP protocols.
Threat Assessment
A Wswhacker infection is a critical data breach and a severe indicator of lateral movement capabilities. The immediate theft of local administrator credentials or VPN passwords can lead directly to full domain compromise and massive data exfiltration.Incident Response and Remediation
- Immediate Network Isolation: Isolate the machine to halt any ongoing data exfiltration and prevent the attacker from utilizing the stolen credentials to pivot to other servers on the LAN.
- Universal Credential Reset: Assume all passwords saved in the user's browser, local email clients, and the local Windows Administrator account are fully compromised. A comprehensive password reset must be initiated immediately.
- Endpoint Eradication and Investigation: Utilize enterprise EDR to locate and terminate the Wswhacker process. Crucially, the incident response team must investigate *how* the Wswhacker tool was placed on the system, as its presence often implies a deeper, pre-existing compromise (like a backdoor or vulnerable public-facing service).
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: T1003 T1552.001 T1555.003 T1048
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1003: Monitor for LSASS memory dumping or registry SAM extraction. Enable Credential Guard on Windows systems.
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_WSWHACKER {
meta:
description = "Detects Wswhacker (trojan)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "wswhacker" ascii wide nocase
$s2 = "hacktool.wswhacker" ascii wide nocase
$s3 = "trojan.pws.wswhacker" ascii wide nocase
$s4 = "win32/wswhacker" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Wswhacker Activity
id: 5ddfa30d1cd3e9f88a142c7a60f91012
status: experimental
description: Detects generic indicators of the wswhacker malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*wswhacker*"
- "*hacktool.wswhacker*"
- "*trojan.pws.wswhacker*"
- "*win32/wswhacker*"
condition: selection
level: mediumReferences & External Analysis
- Search "wswhacker" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Wswhacker Trojan from Windows?
Manual removal of Wswhacker 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 Wswhacker a virus or a Trojan?
Wswhacker is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Wswhacker typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Wswhacker infection?
Symptoms of Wswhacker 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: trojan)
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Protect Your Network Against Trojans
Want to prevent Wswhacker 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/wswhacker.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.