Passcv
Overview
Executive Summary
PassCV is a highly specialized credential stealer designed to extract stored passwords, autocomplete data, and sensitive session tokens from compromised Windows environments. It primarily targets web browsers, email clients, and FTP applications, acting as an automated data harvesting tool for threat actors.Infection Vector and Extraction Methodology
PassCV is often deployed as a secondary payload, dropped by an initial access broker or a generic downloader trojan following a successful phishing campaign. It is engineered for rapid execution; its goal is to extract data and exfiltrate it before the victim or security tools can respond. Upon execution, PassCV scans the host system for installed applications known to store credentials locally. It targets the underlying SQLite databases and encrypted credential stores of popular web browsers (Google Chrome, Mozilla Firefox, Microsoft Edge), email clients (Microsoft Outlook, Thunderbird), and FTP clients (FileZilla). PassCV utilizes native Windows APIs (such as `CryptUnprotectData` within the DPAPI - Data Protection API framework) to decrypt the stored passwords locally. The harvested data—which includes URLs, usernames, passwords, and occasionally credit card numbers—is aggregated into a single file, compressed, and exfiltrated to a command-and-control (C2) server via HTTP POST requests.Security and Privacy Implications
A PassCV infection is a critical security incident that often precedes lateral movement or data breaches. The rapid theft of browser-stored credentials provides attackers with immediate, authenticated access to corporate web applications, cloud infrastructure (e.g., AWS, Azure), and internal portals.Incident Response and Mitigation
- Credential Invalidation: Immediate, organization-wide password resets are mandatory following a confirmed PassCV infection. All active session tokens must be forcibly revoked.
- Policy Enforcement: Implement Group Policy Objects (GPOs) to explicitly disable the built-in password management and autofill features within corporate web browsers.
- Behavioral Monitoring: Configure EDR solutions to monitor for anomalous access to browser profile directories (`%LocalAppData%\Google\Chrome\User Data`) and the unauthorized use of DPAPI functions by non-system processes.
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: T1555.003 T1003 T1048 T1552.001
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_PASSCV {
meta:
description = "Detects Passcv (trojan)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "passcv" ascii wide nocase
$s2 = "trojan.passcv" ascii wide nocase
$s3 = "passwordstealer.passcv" ascii wide nocase
$s4 = "win32/passcv" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Passcv Activity
id: 6f75c760e6bc01a861f7cc7e7ca9cd0c
status: experimental
description: Detects generic indicators of the passcv malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*passcv*"
- "*trojan.passcv*"
- "*passwordstealer.passcv*"
- "*win32/passcv*"
condition: selection
level: mediumReferences & External Analysis
- Search "passcv" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Passcv Trojan from Windows?
Manual removal of Passcv 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 Passcv a virus or a Trojan?
Passcv is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Passcv typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Passcv infection?
Symptoms of Passcv 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 Passcv 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/passcv.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.