Evrial
Table of Contents
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 our technical analysis hubs and the official MITRE ATT&CK framework:
| Technique | Name | Tactic | Official Spec |
|---|---|---|---|
T1115 | Clipboard Data (Actively hijacking and modifying copied data) | Collection | ATT&CK ↗ |
T1555.003 | Credentials from Password Stores: Credentials from Web Browsers | Credential Access | ATT&CK ↗ |
T1005 | Data from Local System (Stealing wallet.dat files) | Collection | ATT&CK ↗ |
T1041 | Exfiltration Over C2 Channel | Exfiltration | ATT&CK ↗ |
MITRE D3FEND™ Defensive Countermeasures
Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):
| D3FEND ID | Countermeasure Name | Tactic | Countered ATT&CK | Defensive Guidance |
|---|---|---|---|---|
D3-FDM | File Data Monitoring | Detect | T1005 | Deploy Data Loss Prevention (DLP) agents to audit sensitive file access and block unauthorized batch file copying. |
D3-EAF | Egress Analysis and Filtering | Isolate | T1041 | Enforce perimeter TLS inspection and alert on anomalous outbound data volume ratios transmitting over active C2 channels. |
D3-CAC | Clipboard Access Control | Isolate | T1115 | Isolate virtual desktop infrastructure (VDI) clipboards and alert on rapid background clipboard querying by non-foreground processes. |
D3-CVH | Credential Vault Hardening | Harden | T1555.003 | Enable DPAPI master key audit logging and isolate browser SQLite database files within virtualization-based security containers. |
Tiered Detection Rules (Cisco CAIRN Model)
Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:
Tier 1 Primitive Artifact Rule (Fast Triage)
Matches raw strings and file markers. Vulnerable to binary repacking and simple obfuscation.
rule MALWARE_WIN_EVRIAL_T1_ARTIFACT {
meta:
description = "Tier 1 Primitive Artifact: Raw string matches for Evrial"
tier = "T1 - Primitive Artifact"
confidence = "Low-Medium (Fast Triage)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
$s1 = "evrial" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Tier 2 Behavioral Context Rule (Process Chains & Sigma)
Tracks parent-child process anomalies and suspicious scripting telemetry. Resilient against file renames.
title: SystemHelpDesk Detection - Evrial (Ransomware) Execution & Triage
id: 0b879fa7-588e-5ca8-af14-6e9807a11df7
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
with the Evrial malware family. Detects volume shadow copy deletion, boot status
tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/evrial
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1115
- attack.t1555_003
- attack.t1005
- attack.t1041
logsource:
category: process_creation
product: windows
detection:
selection_process:
Image|endswith:
- \vssadmin.exe
- \wmic.exe
- \wbadmin.exe
- \bcdedit.exe
CommandLine|contains:
- delete shadows
- shadowcopy delete
- resize shadowstorage
- recoveryenabled no
- ignoreallfailures
condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: criticalTier 3 Attribution Fingerprint Rule (High Fidelity)
Deep signature matching distinctive operational fingerprints and payload characteristics.
rule MALWARE_WIN_EVRIAL_T3_ATTRIBUTION {
meta:
description = "Tier 3 Attribution Fingerprint: Heuristic detection for Evrial tradecraft"
tier = "T3 - Attribution Fingerprint"
confidence = "High (Confirmed Family Signature)"
author = "SystemHelpdesk Threat Research Desk"
date = "2026-10-14"
strings:
// Core family identifier & heuristic payload signatures
$attrib_str = "evrial" ascii wide nocase
$pe_magic = "MZ" ascii
$net_marker = "http" ascii nocase
condition:
uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}Containment & Response Steps
Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.
- Isolate the endpoint to halt the exfiltration of the stolen credential archives and wallet files.
- 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.
- Use EDR to locate the Evrial executable (often hidden in `%AppData%`) and remove its associated Registry Run keys.
- 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.
- Do not assume a password change is sufficient if the attacker stole active session cookies; ensure all active web sessions are forcefully terminated.
- 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)
- Search "evrial" on Any.Run (Sandbox Sandbox)
- Search "evrial" on MalwareBazaar (Malware Samples)
Frequently Asked Questions
What is Evrial and what threat category does it belong to?
Evrial is classified as a Ransomware. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments.
How does Evrial establish persistence and evade defensive controls?
Evrial typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks.
What are the essential incident response steps for mitigating a Evrial compromise?
Security teams responding to Evrial should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups.
What cryptographic algorithms and file targeting techniques does Evrial employ during execution?
Evrial typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options.
Are decryptors available for Evrial, and what is the recommended recovery procedure?
Decryption availability for Evrial depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups.
How do I remove Evrial from Windows?
Manual removal of Evrial 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.
What are the main symptoms of a Evrial infection?
Symptoms of Evrial 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.
Protect Your Network Against Ransomwares
Want to prevent Evrial and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Containment & Incident Response.
📣 Threat Intel Correction or Update?
Notice an outdated IOC, unlisted alias, or disputed attribution? Threat researchers are invited to propose an update on GitHub or contact the SystemHelpDesk research desk. All community revisions are credited in our public CHANGELOG.
Machine-readable
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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.