Today, ransomware operations resemble well-organized business strategies. Attackers carefully plan their approach and use trusted system tools to dismantle defenses silently. As a result, organizations often fail to detect the attack until it is too late.
Interestingly, the tools being misused were originally designed for legitimate administrative purposes. Utilities such as Process Hacker, IOBit Unlocker, PowerRun, and AuKill help IT teams manage processes, unlock files, and troubleshoot systems. However, threat actors now weaponize these tools to terminate antivirus programs and endpoint detection and response (EDR) solutions before deploying ransomware payloads.
Because these tools are digitally signed and widely used across enterprises, most security systems treat their activity as normal. Consequently, this allows attackers to operate under the radar, leaving minimal traces behind.
According to researchers from Seqrite, this tactic has become a defining characteristic of modern ransomware campaigns. Notably, major ransomware families such as LockBit 3.0, BlackCat, Dharma, Phobos, and MedusaLocker have adopted similar strategies.
Furthermore, attackers no longer depend exclusively on custom-built malware. Instead, they analyze their targets, identify vulnerabilities, and exploit trusted tools already present within the environment. This approach not only increases efficiency but also reduces the likelihood of detection.
Disabling antivirus software is no longer a secondary action—it is now a critical step in the attack chain. When security tools remain active, they can block malicious payloads, detect unusual encryption behavior, and alert security teams in real time. Therefore, attackers prioritize neutralizing these defenses to create a silent execution window.
Over time, this strategy has evolved significantly. Earlier ransomware attacks, such as CryptoLocker and WannaCry, relied on simple scripts. Later campaigns, including Conti and LockBit 2.0, introduced kernel-level manipulations. Now, attackers integrate prebuilt antivirus-disabling modules directly into ransomware-as-a-service (RaaS) kits, making attacks more scalable and efficient.
Two-Stage Attack Strategy
Once attackers gain initial access, they typically follow a structured two-stage process.
In the first stage, they focus on disabling antivirus systems and escalating privileges. Tools like IOBit Unlocker remove antivirus files, while TDSSKiller unloads kernel drivers. Meanwhile, Process Hacker terminates active security processes, and other utilities delete registry entries to prevent antivirus tools from restarting.
In the second stage, attackers escalate the attack further. They deploy tools like YDArk to maintain persistence, while PowerRun executes ransomware with elevated SYSTEM privileges. Additionally, Mimikatz extracts credentials from memory, enabling lateral movement across networks. Tools such as Unlock_IT and AuKill erase forensic traces and terminate any remaining defenses.
By the time both stages are complete, attackers fully compromise the environment, allowing ransomware to encrypt files without interruption.
Mitigation Strategies
To counter these threats, organizations must adopt proactive security measures. For instance, enforcing multi-factor authentication (MFA), implementing application whitelisting, and monitoring suspicious commands like “sc stop” or “taskkill” can significantly reduce risk.
Additionally, security teams should audit registry changes, restrict access to administrative tools, and train analysts to detect early signs of defense evasion. Most importantly, organizations must isolate compromised endpoints immediately to prevent lateral movement.
Ultimately, this emerging trend highlights a critical shift in ransomware tactics—where trusted tools become weapons, and prevention requires deeper visibility and stronger security controls.
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