Identified by cybersecurity experts from Symantec and Carbon Black, a new strain of ransomware, dubbed Osiris, has emerged as a significant threat following its deployment in an attack against a large Southeast Asian food service company. The attack, which took place in November 2025, marks a novel integration of tactics to disable security protocols and amplify the attack’s impact.
Increasingly Sophisticated Attack Techniques Uncovered
Investigators noted that the attackers behind Osiris employed the “Bring Your Own Vulnerable Driver” (BYOVD) tactic. This method involves the use of a compromised driver, allowing attackers to bypass protective layers within target systems’ security protocols. Consequently, the Osiris ransomware was able to operate unchecked by traditional antivirus defenses.
Investigating the POORTRY Driver Exploit
The methodology included the manipulation of the POORTRY driver — a critical element contributing to the attack’s success. By exploiting vulnerabilities therein, Osiris managed to dismantle existing security infrastructures, leaving the food service franchise operator’s network defenseless. This exploit exemplifies the innovative, albeit malicious, approach employed by modern cybercriminals.
Target and Impact: A Breakdown of the Attack’s Target and Methodology
The focal point of the November 2025 cyber offensive was a prominent chain within the Southeast Asian food service industry. This choice of target indicates a strategic aim at sectors pivotal to regional economies, potentially causing widespread operational disruption and financial impact.
- Leveraged the BYOVD technique to sidestep defenses.
- Utilized malicious driver models, notably the POORTRY configuration.
- Targeted a key industry integral to Southeast Asia’s economy.
Responding to Emerging Threats
As cybersecurity practitioners continue to navigate an evolving landscape, understanding and anticipating such sophisticated methods is paramount. Monitoring for signs of BYOVD use and improving detection of suspicious driver activities could enhance defense mechanisms, preempting similar ransomware incidents in the future.
This novel ransomware approach underscores an urgent need for heightened vigilance and innovation in countering cybersecurity threats.
