Trojan:Win32/Strictori is a detection name for a family of trojan horse malware that targets Windows systems with the primary goal of downloading and executing additional malicious payloads. This trojan operates as a first-stage dropper, establishing a foothold on infected machines before retrieving more sophisticated threats from attacker-controlled servers. While not as visible as ransomware or screen-locking malware, Strictori poses a serious threat because it opens the door to virtually any secondary infection—from banking trojans and spyware to ransomware and botnet agents.
Threat Profile
| Attribute | Details |
|---|---|
| Threat Family | Trojan-Dropper/Trojan-Downloader |
| Aliases | Win32/Strictori, Trojan.Win32.Strictori, W32/Strictori, Trojan.Generic (varies by vendor) |
| Platform | Windows (XP through 11, primarily 32-bit variants but adaptable) |
| First Observed | Variants documented since approximately 2015, active family |
| Distribution Methods | Malicious email attachments, exploit kits, bundled with cracked software, fake updates |
| Privilege Level | Typically runs with user privileges; may attempt elevation via UAC bypass techniques |
| Persistence Mechanisms | Registry Run keys, scheduled tasks, startup folder links (typical for this family) |
| Primary Capabilities | Download and execute arbitrary binaries, establish C2 communication, modify system settings, disable security features |
| Secondary Payload Types | Varies—ransomware, info-stealers, cryptominers, adware, banking trojans, RATs |
| Network Behavior | HTTP/HTTPS connections to C2 servers for payload retrieval and command reception; domains often change |
| Common Artifacts | Random-named executables in %APPDATA% or %LOCALAPPDATA%, modified Run registry keys, suspicious scheduled tasks |
| Removal Difficulty | Moderate—trojan itself can be removed with proper tools, but secondary payloads may complicate cleanup |
How It Spreads
Trojan:Win32/Strictori rarely arrives on systems through a single distribution method. Like most modern trojans, it leverages multiple infection vectors to maximize reach. The most common entry point is through social engineering—attackers send targeted or mass email campaigns with malicious attachments disguised as invoices, shipping notices, tax documents, or resume files. When opened, these documents either exploit vulnerabilities in Office applications or contain embedded macros that download and execute the Strictori payload.
Software bundling represents another major distribution channel. Users who download cracked applications, key generators, or "free" versions of commercial software from unofficial sources frequently encounter Strictori bundled within the installer. These trojanized installers often appear legitimate, complete with authentic-looking splash screens and license agreements, making detection difficult for users who aren't scrutinizing every step of the installation process.
Common distribution methods include:
- Malicious email attachments—Word documents with macros, PDFs with embedded exploits, or ZIP archives containing executable files with double extensions (.pdf.exe)
- Drive-by downloads—Compromised websites or malicious advertisements that exploit browser or plugin vulnerabilities to silently download the trojan
- Software cracks and keygens—Bundled within pirated software packages distributed through torrent sites and file-sharing networks
- Fake software updates—Disguised as Flash Player updates, codec packs, or system optimization utilities
- Exploit kits—Automated attack platforms that scan visitors for vulnerable software versions and deliver appropriate exploits
- Malvertising campaigns—Malicious advertisements on legitimate websites that redirect to exploit landing pages
What It Does On Your Machine
Once executed, Trojan:Win32/Strictori immediately begins establishing persistence on the infected system. The trojan copies itself to a subdirectory within the user's AppData folder—often using a randomly generated GUID-style folder name to avoid detection. It then modifies Windows registry keys to ensure automatic execution at system startup, typically targeting the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run key with an entry pointing to its executable.
The trojan's core function is communication with command-and-control servers operated by the attackers. It establishes an outbound connection, transmits basic system information (operating system version, installed security software, system locale), and awaits instructions. These instructions typically include URLs for downloading additional malware payloads. What arrives next depends entirely on the attacker's current campaign objectives—it might be ransomware, cryptocurrency miners, information-stealing malware targeting browser credentials and cryptocurrency wallets, or remote access trojans that grant full system control.
In many variants, Strictori attempts to disable or interfere with security software. It may modify Windows Defender settings, add exclusions to antivirus programs, or terminate security-related processes. Some variants also modify proxy settings or hosts file entries to redirect traffic or prevent access to security vendor websites. The trojan operates quietly in the background—there are no ransom notes, no obvious system changes, and no overt symptoms beyond occasional performance degradation or unexplained network activity. This stealth approach allows it to maintain presence for extended periods while continuously downloading new threats or exfiltrating data collected by secondary payloads.
Manual Removal — Step by Step
Disconnect From the Internet
Immediately disconnect your computer from the internet by unplugging the ethernet cable or disabling Wi-Fi. This prevents Strictori from downloading additional payloads and stops any data exfiltration in progress. Do not reconnect until removal is complete and verified.
Boot Into Safe Mode With Networking
Restart your computer and enter Safe Mode with Networking. On Windows 10/11, hold Shift while clicking Restart, then navigate to Troubleshoot > Advanced Options > Startup Settings > Restart, and select option 5. Safe Mode loads only essential drivers, preventing most malware from executing while still allowing you to download cleanup tools.
Open Task Manager and Identify Suspicious Processes
Press Ctrl+Shift+Esc to open Task Manager. Look for processes with random names, processes consuming unusual amounts of CPU or network resources, or processes running from user directories (AppData, Temp) rather than System32. Right-click any suspicious process, select "Open file location" to note its path, then "End task" to terminate it.
Remove Persistence Registry Entries
Press Win+R, type "regedit" and press Enter. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run and HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run. Look for entries with random names or paths pointing to AppData or Temp folders. Right-click and delete any suspicious entries—take screenshots first if you're uncertain. Also check the RunOnce key in both locations.
Check and Remove Scheduled Tasks
Open an elevated Command Prompt (search for cmd, right-click, "Run as administrator") and type: schtasks /query /fo LIST /v > tasks.txt. Open the tasks.txt file and search for scheduled tasks with random names or tasks pointing to executables in AppData or Temp folders. Delete suspicious tasks using: schtasks /delete /tn "TaskName" /f
Delete the Malware Files
Navigate to the file locations you identified in steps 3-5. Delete the entire folder containing the trojan executable—not just the .exe file, but the entire parent folder (often a GUID-style folder name). Also check and clear the contents of %TEMP% and C:\Windows\Temp. Empty the Recycle Bin afterward. If Windows reports files are in use, reboot to Safe Mode again and retry.
Scan With Reputable Anti-Malware Tools
Reconnect to the internet and download Malwarebytes Free (from the official malwarebytes.com site only). Run a full system scan—not a quick scan. Malwarebytes is particularly effective against trojan-dropper families. Also run a scan with your existing antivirus if it didn't catch the infection initially, ensuring definitions are fully updated. Remove all detections found.
Reset Browser Settings
Strictori sometimes installs browser extensions or modifies settings to inject ads or track activity. In Chrome, go to Settings > Reset settings > Restore settings to original defaults. In Firefox, type about:support in the address bar and click "Refresh Firefox." In Edge, go to Settings > Reset settings > Restore settings to their default values. This removes extensions, clears startup pages, and resets search engines.
Change All Important Passwords
Because Strictori may have downloaded information-stealing malware, assume all passwords entered while infected are compromised. Change passwords for email accounts, banking sites, PayPal, Amazon, social media, and any other sensitive accounts. Do this from a known-clean device if possible, or after completing all previous removal steps. Enable two-factor authentication wherever available.
Reboot and Monitor
Restart your computer normally (not in Safe Mode) and monitor system behavior for 24-48 hours. Watch for unusual network activity, unexpected processes in Task Manager, browser redirects, or performance issues. Run another full scan with Malwarebytes and your antivirus to confirm the system is clean. If any symptoms persist, professional service may be necessary to address secondary infections.
Prevention
- Maintain updated security software—Keep Windows Defender or a reputable third-party antivirus running with real-time protection enabled and definitions updated daily. Enable firewall protection and don't create broad exceptions that might allow trojans to communicate freely.
- Disable macros in Office documents by default—In Word, Excel, and PowerPoint, go to File > Options > Trust Center > Trust Center Settings > Macro Settings and select "Disable all macros with notification." Only enable macros for documents from verified, trusted sources.
- Scrutinize email attachments with extreme skepticism—Never open attachments from unknown senders. Even if an email appears to come from a known contact, verify through a separate communication channel if the attachment is unexpected. Be especially wary of ZIP files, Office documents requesting macro enabling, and files with double extensions.
- Keep all software updated—Enable automatic updates for Windows, all browsers, Adobe products, Java, and other commonly exploited applications. Outdated software provides the vulnerabilities that exploit kits and drive-by downloads rely on. Remove software you no longer use rather than leaving it unpatched.
- Only download software from official sources—Avoid pirated software, key generators, and "free" versions of commercial applications from torrent sites or file-sharing networks. These are the primary distribution channels for trojan-droppers. If you can't afford software, look for legitimate free alternatives rather than cracked versions.
- Use standard user accounts for daily computing—Don't run as an administrator for routine tasks like browsing and email. Create a separate standard user account for daily use. This limits malware's ability to make system-wide changes and install deeply-rooted persistence mechanisms.
- Implement browser security extensions—Use extensions like uBlock Origin to block malicious advertisements and NoScript or uMatrix (for advanced users) to prevent drive-by download attempts. These add defense layers against web-based infection vectors.
- Maintain offline backups of critical data—Keep regular backups on external drives that are disconnected when not in use, or use a backup service with versioning. If Strictori downloads ransomware, having clean backups lets you restore without paying. Follow the 3-2-1 rule: three copies, two different media types, one offsite.
When Computer Repair Roswell removes Trojan:Win32/Strictori and its associated infections, we guarantee our work for 90 days. If you experience any recurrence of the same malware within three months, bring your machine back and we'll re-clean it at no charge. That's our commitment to thorough, professional malware removal.
Bring It In
Manual removal of Trojan:Win32/Strictori is technically feasible for users comfortable with registry editing, task management, and security tool operation. However, this trojan's primary danger is the unpredictable nature of what it downloads. You might successfully remove Strictori itself but miss the information-stealer it installed two days ago, or overlook the cryptominer consuming your CPU cycles in the background, or fail to detect the remote access trojan now providing an attacker with backdoor access. Comprehensive cleanup requires expertise in identifying all associated infections and verifying system integrity.
Computer Repair Roswell has removed hundreds of trojan infections from systems throughout the Roswell and North Fulton area. We use commercial-grade diagnostic and cleaning tools unavailable to home users, and our technicians know what to look for beyond the obvious detections. We'll clean your machine thoroughly, verify with multiple scanning engines, check for credential theft, test all functionality, and provide you with actionable security recommendations to prevent reinfection. Call us at (770) 856-1171 or stop by our shop at 1862 Dogwood Dr, Roswell, GA 30075. We offer same-day service for most infections, and we'll have you back up and running securely—often while you wait.