Threat Profile
| Threat Name | StilachiRAT |
| Threat Type | Remote Access Trojan (RAT) |
| Platform | Windows (all versions) |
| File Type | Windows PE executable |
| First Observed | Prior to June 2026 |
| Primary Targets | Cryptocurrency holders, financial data, credential stores |
| Detection Names | StilachiRAT (canonical), variants detected as generic backdoors by AV engines |
| Severity | Critical—enables complete system compromise and financial theft |
| Persistence Method | Windows services with watchdog processes |
| C2 Protocol | TCP over multiple ports (flexible configuration) |
| Data Exfiltration | Browser credentials, cryptocurrency wallets, clipboard contents, system reconnaissance data |
| Intelligence Source | Microsoft Incident Response, Malpedia (updated June 10, 2026) |
How It Spreads
StilachiRAT typically arrives through targeted attack campaigns rather than mass distribution. Attackers focus on victims likely to have cryptocurrency holdings or valuable financial data, using social engineering to bypass the user's natural caution. The operators behind this trojan invest time in reconnaissance before deployment, making each infection part of a deliberate strategy rather than opportunistic malware spreading. The trojan's distribution methods show planning and patience. Attackers often establish initial contact through legitimate-seeming communication before delivering the payload. Once they've identified a valuable target, they tailor their approach to that specific victim's habits and vulnerabilities. This targeted methodology means infections are less common than with mass-market malware, but far more dangerous when they occur. Common distribution vectors include: - **Spear-phishing emails** with cryptocurrency-themed lures (tax documents for crypto transactions, wallet security updates, exchange notifications) - **Trojanized software** disguised as cryptocurrency portfolio trackers, mining utilities, or wallet management tools - **Compromised websites** serving drive-by downloads to visitors researching cryptocurrency investments - **Supply chain attacks** through compromised legitimate software update mechanisms - **Social engineering** via Discord, Telegram, or cryptocurrency forums offering "help" with wallet issues - **Malicious attachments** in emails purporting to be from exchanges, tax authorities, or financial institutionsWhat It Does On Your Machine
Once StilachiRAT executes, it immediately begins extensive system reconnaissance to map your computer's configuration, installed software, network connections, and security posture. This information helps the malware understand what protective measures it needs to evade and what valuable data exists on the system. The trojan catalogs running processes, identifies security software, and inventories storage locations where credentials and cryptocurrency wallets typically reside. The malware establishes persistence through Windows services paired with watchdog processes—a sophisticated approach that ensures the trojan restarts even if you manage to stop one component. These services run with system-level privileges and resist standard removal attempts. The watchdog monitors the main malicious service and automatically restarts it if terminated, while the main service simultaneously monitors the watchdog, creating a mutually reinforcing infection that's difficult to eliminate manually. StilachiRAT's command-and-control communication uses flexible TCP connections across multiple ports, making network-based detection more challenging. The operators can issue a broad set of commands including file manipulation, process creation and termination, system information gathering, registry modification, and even forcing system reboots to complete configuration changes. This flexibility gives attackers complete remote control equivalent to sitting at your keyboard. The credential theft functionality is particularly dangerous. The trojan targets browser password stores from Chrome, Firefox, Edge, and other popular browsers, extracting saved login credentials for banking, email, social media, and cryptocurrency exchanges. It monitors your clipboard continuously, watching for cryptocurrency wallet addresses, passwords, seed phrases, or other sensitive data you copy and paste. When detected, this information is immediately exfiltrated to attacker-controlled servers. Cryptocurrency wallet files are specifically targeted, with the malware searching standard installation paths for popular wallet software and copying wallet.dat files and similar stores that contain private keys.Manual Removal — Step by Step
Disconnect and Document
Immediately disconnect from the internet by unplugging your ethernet cable or disabling Wi-Fi. Write down any unusual symptoms you've noticed: cryptocurrency disappearing, passwords not working, unfamiliar network activity. Take photos of any suspicious processes in Task Manager before proceeding. This documentation helps verify complete removal later.
Boot to Safe Mode with Networking
Restart your computer and press F8 repeatedly during boot (Windows 7/8) or hold Shift while clicking Restart from the Start menu (Windows 10/11), then navigate to Troubleshoot > Advanced Options > Startup Settings > Restart > Safe Mode with Networking. Safe Mode loads minimal drivers and services, preventing the watchdog processes from automatically restarting.
Identify Malicious Services
Press Windows+R, type services.msc, and press Enter. Look for services with generic names, random character strings, or descriptions that don't match Microsoft services. Pay special attention to services set to "Automatic" that started recently. Right-click suspicious services, select Properties, and note the executable path before stopping them. Set startup type to "Disabled" for each suspicious service.
Terminate Persistent Processes
Open Task Manager (Ctrl+Shift+Esc) and examine all running processes. Look for unfamiliar processes consuming network bandwidth or those running from user AppData directories. Note the executable location before terminating. StilachiRAT often runs from randomly-named folders in %LOCALAPPDATA% or %APPDATA%. End these processes, but remember the watchdog may attempt restarts—work quickly.
Delete Malware Files
Navigate to the executable paths you identified in the services and processes. Common locations include C:\Users\[YourName]\AppData\Local\[RandomFolder]\ and similar AppData subdirectories. Delete the entire folder containing the malware. Empty your Recycle Bin immediately. If Windows prevents deletion citing "file in use," the service or process wasn't fully stopped—return to steps 3 and 4.
Clean Registry Entries
Press Windows+R, type regedit, and press Enter. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ and locate the malicious service entries you identified earlier. Right-click each and delete. Also check HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run for persistence entries pointing to the deleted executables. Exercise extreme caution—deleting wrong registry keys can break Windows.
Scan with Multiple Tools
Run full system scans with at least two reputable anti-malware tools: your existing antivirus plus Malwarebytes or HitmanPro. StilachiRAT uses stealth techniques that single scanners may miss. Quarantine or delete all detections. Restart in Safe Mode again if additional threats are found, as they may represent components you missed.
Change All Credentials
Using a different, known-clean device (not the infected computer), change passwords for every account: banking, email, cryptocurrency exchanges, social media, work accounts—everything. Enable two-factor authentication wherever possible. Assume all credentials on the infected machine were compromised. For cryptocurrency wallets, create new wallet addresses and transfer funds from the old addresses, as the private keys are likely stolen.
Monitor for Persistence
Restart normally (not Safe Mode) and monitor behavior for several days. Watch Task Manager for suspicious processes, check services.msc for re-created malicious services, and monitor network activity with Resource Monitor. If any malicious components reappear, the watchdog or additional persistence mechanism survived—consider professional assistance at this point.
Consider Clean Reinstall
Given StilachiRAT's sophisticated persistence mechanisms and the critical nature of financial data at risk, a complete Windows reinstall from verified media is the only guaranteed removal method. Back up personal files (but not executables or system files) to external storage, scan the backup with multiple tools, then perform a clean Windows installation. This is especially important if cryptocurrency or significant financial accounts were accessed from this machine.
Prevention
- Isolate cryptocurrency operations. Use a dedicated computer or hardware wallet for cryptocurrency storage and transactions—never the same machine you use for email, web browsing, or downloading software. This compartmentalization limits exposure even if your daily-use computer becomes infected.
- Verify software sources meticulously. Download cryptocurrency wallets, portfolio trackers, and related tools only from official websites by typing the URL directly (never from search engine results or email links). Verify digital signatures and checksums before installation. Be extremely skeptical of "helpful" tools recommended in forums or social media.
- Scrutinize cryptocurrency-related emails. Legitimate exchanges and wallet providers rarely email urgent security warnings or requests for action. Verify any such communication by logging into your account directly through your browser (not email links) or calling official support numbers from the company's website. Treat attachments and links with extreme suspicion.
- Maintain robust antivirus with behavioral detection. Use enterprise-grade or high-quality consumer security software that includes behavioral analysis, not just signature-based detection. StilachiRAT uses evasion techniques that signature-only scanners miss. Keep definitions updated automatically and enable real-time protection.
- Enable network monitoring. Configure your router or use software firewalls that alert you to sustained outbound connections, especially on non-standard ports. RATs like StilachiRAT maintain persistent C2 connections that create detectable traffic patterns different from normal browsing.
- Implement application whitelisting. On Windows 10 Pro and above, use AppLocker or similar tools to prevent execution of programs from user AppData directories unless explicitly approved. This blocks the most common persistence locations for trojans while allowing normal software to function.
- Regular offline backups. Maintain encrypted backups of cryptocurrency wallet files, important documents, and system images on offline storage (external drives disconnected after backup). If compromised, you can restore to a pre-infection state without paying ransom or losing access to cryptocurrency due to stolen keys.
- Monitor financial accounts continuously. Enable transaction notifications for bank accounts, credit cards, and cryptocurrency exchanges. Unusual login locations, failed login attempts, or unexpected transactions may indicate credential compromise. React immediately to alerts rather than assuming they're false positives.