A sophisticated malware campaign known as “GrassCall” has been identified as a targeted attack on job seekers. Attributed to the threat group Crazy Evil, this operation has been exploiting vulnerabilities in job hunters by offering fake employment opportunities on well-known platforms such as LinkedIn and CryptoJobsList. The campaign, which began in early 2025, continued through February and March, using a multi-stage approach designed to appear legitimate to victims, ultimately leading them to download a fake video conferencing software named “GrassCall.”
Once job seekers show interest in the supposed job positions, they are directed to participate in video interviews for non-existent roles.
The attackers use the lure of employment to bypass suspicion, convincing victims to download the GrassCall software. Upon installation, the malware deploys different payloads tailored to the victim’s operating system. For Windows users, a customized infostealer variant is used to extract sensitive data, while macOS users are targeted with the AMOS Stealer strain, both capable of harvesting crucial personal and financial information.
The malware’s capabilities are particularly dangerous, as it can extract authentication cookies, browser-saved credentials, cryptocurrency wallet information, and other private data that could result in identity theft and financial loss. Cybersecurity experts from BroadCom highlighted that the malware uses advanced evasion techniques to avoid detection, and the stolen data is sent to command and control servers operated by the threat actors.
The group has even rebranded their malware as “VibeCall,” continuing their campaign under a new name while maintaining similar attack tactics.
To counter this threat, cybersecurity companies like Symantec have implemented protection measures, including blocking malicious software through multiple security products. These defenses involve carbon-black-based protection and delayed execution features, enhancing the chances of identifying and blocking GrassCall’s components. Security experts have urged job seekers to exercise caution when receiving unsolicited offers, especially those requesting the download of unknown software. Organizations are also encouraged to stay informed on emerging threats and educate employees on the tactics being used in these types of social engineering attacks.
