Listen to this Post
Microsoft has uncovered a massive malvertising campaign that has infected nearly 1,000,000 Windows devices globally since December 2024. The campaign originates from illegal streaming sites and uses GitHub to deliver infostealers like Lumma and Doenerium. The attack tricks users into clicking a prompt, possibly using the ClickFix CAPTCHA method, though this is not confirmed, initiating a multi-stage infection.
You Should Know:
To protect your systems from such malvertising campaigns, here are some practical commands and steps you can take:
1. Scan for Malware:
Use Windows Defender to scan your system for malware:
MpCmdRun.exe -Scan -ScanType 2
2. Check Network Connections:
Use `netstat` to monitor active connections and detect suspicious activity:
netstat -ano
3. Block Suspicious IPs:
Use Windows Firewall to block suspicious IP addresses:
netsh advfirewall firewall add rule name="Block Malicious IP" dir=in action=block remoteip=<IP_ADDRESS>
4. Update System:
Ensure your system is up-to-date with the latest security patches:
wuauclt.exe /updatenow
5. Check for Unauthorized GitHub Repositories:
If you suspect a GitHub repository is being used maliciously, report it to GitHub and block access:
git config --global --unset url."https://github.com/".insteadOf
6. Monitor Processes:
Use Task Manager or PowerShell to monitor running processes:
Get-Process | Sort-Object CPU -Descending
7. Disable Unnecessary Services:
Disable services that are not required to reduce attack surface:
sc config <SERVICE_NAME> start= disabled
8. Enable Controlled Folder Access:
Protect sensitive folders from unauthorized changes:
Set-MpPreference -EnableControlledFolderAccess Enabled
9. Check for Unusual Scheduled Tasks:
Review scheduled tasks for any unusual activity:
schtasks /query /fo LIST /v
10. Use PowerShell to Remove Malicious Files:
If you identify malicious files, remove them using PowerShell:
Remove-Item -Path <FILE_PATH> -Force
What Undercode Say:
This malvertising campaign highlights the importance of maintaining robust cybersecurity practices. Regularly updating your system, monitoring network activity, and using advanced threat detection tools can significantly reduce the risk of infection. Always be cautious when clicking on prompts or downloading files from untrusted sources. Implementing the commands and practices mentioned above can help safeguard your systems against such sophisticated attacks.
For more detailed information, you can refer to the Microsoft Security Blog.
References:
Reported By: Alon Gal – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
