Evrial

Overview

TrojanSpy:Win32/Evrial is a specialized, highly aggressive Information Stealer that gained prominence for its intense focus on cryptocurrency theft. While it performs standard infostealer duties (grabbing browser cookies and passwords), Evrial is infamous for its 'Clipboard Hijacking' capability, actively monitoring the Windows clipboard and instantly swapping the victim's copied cryptocurrency wallet address with an address controlled by the attacker.

Understanding the Evrial Stealer
To the victim, the theft occurs in a split second. They copy a Bitcoin address to send a payment, paste it into their wallet application, and hit send, not realizing the address changed between the 'copy' and the 'paste'. For security analysts, Evrial represents a highly targeted, financially motivated threat. It doesn't need to deploy ransomware; it steals funds directly and irrevocably from the endpoint.

Execution and Clipboard Hijacking Mechanics
Evrial is typically distributed via cracked software, fake game cheats, or malicious forum links (`T1204.002`). Upon execution, it establishes persistence via Registry Run keys (`T1547.001`). It performs a rapid smash-and-grab of the system, targeting browser credential stores (`T1555.003`), FTP clients, and desktop cryptocurrency wallet files (like `wallet.dat`) (`T1005`). Crucially, it registers a listener on the Windows Clipboard API (`T1115`). It uses Regular Expressions (Regex) to constantly scan clipboard data for strings that match the format of Bitcoin, Ethereum, Monero, or Litecoin addresses. If a match is found, Evrial instantly replaces the clipboard contents with the attacker's corresponding wallet address. All stolen data is zipped and exfiltrated to a C2 server via HTTP POST requests (`T1041`).

Indicators of Compromise & Impact
The primary impact is the direct, unrecoverable theft of cryptocurrency and compromised online accounts. The most glaring IoC is the user reporting that their copied crypto address mysteriously changed when pasted. Network logs will show a sudden burst of outbound HTTP POST traffic (often containing a `.zip` file) immediately after the malware is executed. EDR logs will flag anomalous access to the `AppData\Roaming\Bitcoin` (or similar wallet directories) and the rapid querying of browser `Login Data` SQLite databases.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to the MITRE ATT&CK framework:

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_EVRIAL {
    meta:
        description = "Detects Evrial (ransomware)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "evrial" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Evrial Activity
id: 9406e1ed73e93b5fdeed6fe859446225
status: experimental
description: Detects generic indicators of the evrial malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*evrial*"
    condition: selection
level: medium

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Isolate the endpoint to halt the exfiltration of the stolen credential archives and wallet files.
2. Assume all passwords stored in the victim's browsers, as well as any cryptocurrency wallets stored on the machine, are fully compromised. Enforce immediate password resets.
3. Use EDR to locate the Evrial executable (often hidden in `%AppData%`) and remove its associated Registry Run keys.
4. Block the identified C2 domains or IP addresses at the enterprise firewall.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not assume a password change is sufficient if the attacker stole active session cookies; ensure all active web sessions are forcefully terminated.
2. Avoid ignoring the clipboard hijacking aspect; educate the user to manually verify the first and last 4 characters of any crypto address they paste.

References & External Analysis

• Search "evrial" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: ransomware)

Explore other malware families in the same category:

• Ridapi
• Winload
• Dadobra
• Hkmain
• Povertel

Machine-readable

Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/evrial.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.