Experts have discovered an advanced malware campaign that exploits the rising popularity of Windows Packet Divert drivers to escape internet checks.

Malware targets YouTubers 

Hackers are spreading SilentCryptominer malware hidden as genuine software. It has impacted over 2000 victims in Russia alone. The attack vector involves tricking YouTubers with a large follower base into spreading malicious links. 

“Such software is often distributed in the form of archives with text installation instructions, in which the developers recommend disabling security solutions, citing false positives,” reports Secure List. This helps threat actors by “allowing them to persist in an unprotected system without the risk of detection. 

Innocent YouTubers Turned into victims

Most active of all have been schemes for distributing popular stealers, remote access tools (RATs), Trojans that provide hidden remote access, and miners that harness computing power to mine cryptocurrency.” Few commonly found malware in the distribution scheme are: Phemedrone, DCRat NJRat, and XWorm.

In one incident, a YouTuber with 60k subscribers had put videos containing malicious links to infected archives, gaining over 400k views. The malicious links were hosted on gitrock[.]com, along with download counter crossing 40,000. 

The malicious files were hosted on gitrok[.]com, with the download counter exceeding 40,000.

Blackmail and distributing malware

Threat actors have started using a new distribution plan where they send copyright strikes to content creators and influencers and blackmail them to shut down channels if they do not post videos containing malicious links. The scare strategy misuses the fame of the popular YouTubers to distribute malware to a larger base. 

The infection chain starts with a manipulated start script that employs an additional executable file via PowerShell. 

As per the Secure List Report, the loader (written in Python) is deployed with PyInstaller and gets the next-stage payload from hardcoded domains.  The second-stage loader runs environment checks, adds “AppData directory to Microsoft Defender exclusions” and downloads the final payload “SilentCryptominer.”

The infamous SilentCryptoMiner

The SilentCryptoMiner is known for mining multiple cryptocurrencies via different algorithms. It uses process hollowing techniques to deploy miner code into PCs for stealth.

The malware can escape security checks, like stopping mining when processes are running and scanning for virtual environment indicators.