Frequently Asked Questions
AuKill Malware & Technical Threats
What is the AuKill EDR killer malware and how does it operate?
AuKill is a type of malware that abuses the legitimate Process Explorer driver (PROCEXP.SYS) to disable endpoint detection and response (EDR) security solutions. It leverages administrative privileges to execute in kernel mode, terminates protected process handles, and can use fallback drivers to maintain persistence and disrupt security measures. (Source: Original Webpage)
How does AuKill abuse the Process Explorer driver?
AuKill drops a legitimate driver (PROCEXP.SYS) from Process Explorer version 16.32 and uses it to terminate protected processes, such as endpoint security clients. By exploiting the driver's capabilities, it bypasses Windows Driver Signature Enforcement and disables advanced security features. (Source: Original Webpage)
What is Windows Driver Signature Enforcement and why is it important?
Windows Driver Signature Enforcement (DSE) is a security mechanism that ensures kernel-mode drivers are signed by a valid code signing authority before execution. This helps validate the software's identity and protects the system from malicious drivers. (Source: Original Webpage)
How do attackers bypass Driver Signature Enforcement?
Attackers can bypass Driver Signature Enforcement by obtaining a legitimate driver's signature or exploiting trusted certificates to disguise malicious drivers. This allows them to load malicious code into the kernel. (Source: Original Webpage)
What file paths and drivers are involved in AuKill attacks?
AuKill typically drops the malicious driver (PROCEXP.SYS) in C:\Windows\System32\drivers and may use installer files in System32 or TEMP directories. It may also reference legitimate drivers like PROCEXP152.sys. (Source: Original Webpage)
How does AuKill disable protected processes and EDR clients?
AuKill uses administrative privileges to execute the driver in kernel mode, then sends IOCTL_CLOSE_HANDLE commands to terminate protected process handles, including those of endpoint security clients. It also starts threads to continuously probe and disable EDR processes and services. (Source: Original Webpage)
What privileges are required for AuKill to execute successfully?
AuKill requires administrator privileges to execute its driver in kernel mode. It checks for these privileges before execution and may attempt privilege escalation using TrustedInstaller.exe if not running with SYSTEM privileges. (Source: Original Webpage)
How does AuKill establish persistence on a compromised system?
AuKill creates a service entry by copying itself to C:\Windows\System32, then installs and starts itself as a service. This allows it to maintain persistence and continue disabling security measures. (Source: Original Webpage)
What fallback mechanisms does AuKill use if it cannot load its main driver?
In some versions, AuKill attempts to load a fallback driver, WindowsKernelExplorer.sys, if it fails to drop and load procexp.sys. However, this fallback driver is not embedded in AuKill and must already exist in the System32\drivers folder. (Source: Original Webpage)
Why is protecting administrative privileges critical in defending against threats like AuKill?
Protecting administrative privileges is essential because malware like AuKill relies on these privileges to execute in kernel mode, disable security controls, and establish persistence. Without administrative access, many of its attack steps would fail. (Source: Original Webpage)
How does AuKill validate its execution keyword?
AuKill requires a command-line keyword (startkey) to execute. It validates the keyword by converting each character to its ASCII value, doubling the value, summing it with the next character, and comparing the final sum to a hardcoded value (57502 or 0xE09E). (Source: Original Webpage)
What is the significance of the Process Explorer driver in AuKill attacks?
The Process Explorer driver, originally created and signed by Microsoft's Sysinternals team, is exploited by AuKill to bypass security features and disable protected processes. Its legitimate signature helps the malware evade detection. (Source: Original Webpage)
How does AuKill attempt privilege escalation if not running as SYSTEM?
If not running with SYSTEM privileges, AuKill attempts to elevate privileges by starting the TrustedInstaller service, duplicating the TrustedInstaller.exe token, and creating a process with elevated rights using CreateProcessWithTokenW. (Source: Original Webpage)
What are the main steps AuKill takes to disable EDR solutions?
AuKill drops procexp.sys to disk, starts threads targeting different EDR components, and continuously probes and disables EDR processes and services to prevent them from restarting. (Source: Original Webpage)
Why is continuous monitoring important for defending against threats like AuKill?
Continuous monitoring is crucial because threats like AuKill exploit trusted drivers and administrative privileges to bypass traditional security controls. Ongoing validation and monitoring help detect and respond to such advanced attacks. (Source: Original Webpage)
How can organizations validate their defenses against threats like AuKill?
Organizations can use Cymulate's Exposure Validation and Threat Validation solutions to simulate real-world attack scenarios, including those that abuse legitimate drivers, and validate the effectiveness of their security controls. (Source: Original Webpage, Cymulate Platform)
What are the risks of attackers gaining access to domain admin machines?
If attackers use lateral movement techniques to escalate privileges and gain access to domain admin machines, they can deploy ransomware, modify Active Directory policies, create backdoors, and disable security tools across the network. (Source: Customer Story - Weak Segmentation, Wide Access.pdf)
How does Cymulate help organizations address advanced persistent threats (APTs) like AuKill?
Cymulate's platform enables organizations to simulate APT techniques, validate their defenses against sophisticated attacks, and receive actionable insights to improve their security posture. (Source: Cymulate Platform, Knowledge Base)
Features & Capabilities
What features does Cymulate offer for exposure and threat validation?
Cymulate offers continuous threat validation, unified platform capabilities (BAS, CART, Exposure Analytics), attack path discovery, automated mitigation, AI-powered optimization, complete kill chain coverage, and an extensive threat library with over 100,000 attack actions updated daily. (Source: Knowledge Base)
How does Cymulate's Threat Validation solution differ from manual pen tests and traditional BAS?
Cymulate's Threat Validation provides automated, continuous security testing with a library of over 100,000 attack actions, easy out-of-the-box control integrations, and automated mitigation capabilities, overcoming the limitations of infrequent manual tests and cumbersome BAS tools. (Source: Knowledge Base)
What is included in Cymulate's Threat Validation solution?
The Threat Validation solution includes Cymulate Exposure Validation, Cymulate Auto Mitigation (optional), and Cymulate Custom Attacks (optional), all delivered via the Cymulate Exposure Management Platform. (Source: Knowledge Base)
How does Cymulate's 'Threat (IoC) updates' feature improve threat resilience?
The 'Threat (IoC) updates' feature provides recommended Indicators of Compromise (IoCs) that can be exported and applied directly to security controls, improving threat resilience by enabling rapid defense against new threats. (Source: Knowledge Base)
What integrations does Cymulate support?
Cymulate integrates with a wide range of security technologies, including Akamai Guardicore, AWS GuardDuty, BlackBerry Cylance OPTICS, Carbon Black EDR, Check Point CloudGuard, Cisco Secure Endpoint, CrowdStrike Falcon, Wiz, SentinelOne, and more. For a full list, visit the Partnerships and Integrations page. (Source: Knowledge Base)
How easy is Cymulate to implement and use?
Cymulate is designed for quick, agentless deployment with no need for additional hardware or complex configurations. Customers report that implementation is easy and the platform is intuitive, with support and educational resources available. (Source: Knowledge Base)
What feedback have customers given about Cymulate's ease of use?
Customers consistently praise Cymulate for its intuitive interface, user-friendly dashboard, and actionable insights. Testimonials highlight its ease of implementation and the value of its support team. (Source: Knowledge Base)
Use Cases & Benefits
Who can benefit from using Cymulate?
Cymulate is designed for CISOs, security leaders, SecOps teams, red teams, and vulnerability management teams in organizations of all sizes and industries, including finance, healthcare, retail, media, transportation, and manufacturing. (Source: Knowledge Base)
What are the main problems Cymulate solves for security teams?
Cymulate addresses overwhelming threats, lack of visibility, unclear risk prioritization, resource constraints, fragmented tools, and operational inefficiencies by automating validation, prioritizing exposures, and providing actionable insights. (Source: Knowledge Base)
How does Cymulate help organizations improve their security posture?
Cymulate enables continuous validation of defenses, prioritizes exposures, automates mitigation, and provides quantifiable metrics, leading to measurable improvements such as up to 81% reduction in cyber risk and 60% increase in team efficiency. (Source: Knowledge Base)
Are there case studies showing Cymulate's effectiveness?
Yes. For example, Hertz Israel reduced cyber risk by 81% in four months, and a sustainable energy company scaled penetration testing cost-effectively with Cymulate. More case studies are available on the Cymulate Customers page. (Source: Knowledge Base)
How does Cymulate support a threat-informed defense strategy?
Cymulate Exposure Validation continuously validates security controls against the latest threats and attack techniques, ensuring defenses are always prepared for current and emerging adversarial methods. (Source: Knowledge Base)
Pricing & Plans
What is Cymulate's pricing model?
Cymulate uses a subscription-based pricing model tailored to each organization's needs. Pricing depends on the chosen package, number of assets, and scenarios selected. For a detailed quote, organizations can schedule a demo with Cymulate. (Source: Knowledge Base)
Security & Compliance
What security and compliance certifications does Cymulate have?
Cymulate holds SOC2 Type II, ISO 27001:2013, ISO 27701, ISO 27017, and CSA STAR Level 1 certifications, demonstrating adherence to industry-leading security and privacy standards. (Source: Knowledge Base)
How does Cymulate ensure data security and privacy?
Cymulate uses encryption for data in transit (TLS 1.2+) and at rest (AES-256), hosts data in secure AWS data centers, and follows a strict Secure Development Lifecycle (SDLC) with regular vulnerability scanning and penetration testing. (Source: Knowledge Base)
Is Cymulate GDPR compliant?
Yes, Cymulate incorporates data protection by design and has a dedicated privacy and security team, including a Data Protection Officer (DPO) and Chief Information Security Officer (CISO), ensuring GDPR compliance. (Source: Knowledge Base)
Competition & Comparison
How does Cymulate compare to other security validation platforms?
Cymulate stands out with its unified platform, continuous threat validation, AI-powered optimization, complete kill chain coverage, ease of use, and proven results such as up to 81% reduction in cyber risk and 60% increase in team efficiency. (Source: Knowledge Base)
What are the advantages of Cymulate for different user segments?
CISOs benefit from quantifiable metrics, SecOps teams gain operational efficiency, red teams access automated offensive testing, and vulnerability management teams can automate validation and prioritize vulnerabilities. (Source: Knowledge Base)
