Combine cutting-edge XDR technology, multi-signal threat intelligence and 24/7 Elite Threat Hunters to help you build a world-class security operation.
Our team delivers the fastest response time in the industry. Threat suppression within just 4 hours of being engaged.
Cyber risk and advisory programs that identify security gaps and build security strategies to address them.
XDR with machine learning that eliminates noise, enables real-time detection and response, and automatically blocks threats.
24/7 SOC-as-a-Service with unlimited threat hunting and incident handling.
Proactive threat intelligence, original threat research and a world-class team of seasoned industry veterans.
Extend your team capabilities and prevent business disruption with expertise from eSentire.
Stop ransomware before it spreads.
Meet regulatory compliance mandates.
Detect and respond to zero-day exploits.
End misconfigurations and policy violations.
Defend third-party and supply chain risk.
Prevent disruption by outsourcing MDR.
Adopt a risk-based security approach.
Meet insurability requirements with MDR.
Protect your most sensitive data.
Defend brute force attacks, active intrusions and unauthorized scans.
Guard endpoints by isolating and remediating threats to prevent lateral spread.
Investigation and threat detection across multi-cloud or hybrid environments.
Remediate misconfigurations, vulnerabilities and policy violations.
Detect and respond to insider and identity-based attacks.
THE THREAT On April 12th, 2024, Palo Alto Networks disclosed a critical, actively exploited vulnerability in Palo Alto Networks’ firewalls. Tracked as CVE-2024-3400 (CVSS: 10), this is a…
Apr 12, 2024THE THREAT On April 12, 2024, Palo Alto Networks disclosed a critical actively exploited vulnerability in Palo Alto Networks’ firewalls. Tracked as CVE-2024-3400 (CVSS: 10), this is a…
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
We believe a multi-signal approach is paramount to protecting your complete attack surface. See why eSentire MDR means multi-signal telemetry and complete response.
See how our 24/7 SOC Cyber Analysts and Elite Threat Hunters stop even the most advanced cyberattacks before they disrupt your business.
Choose the right mix of Managed Detection and Response, Exposure Management, and Incident Response services to strengthen your cyber resilience.
Try our interactive tools including the MITRE ATT&CK Tool, the SOC Pricing Calculator, the Cybersecurity Maturity Assessment, and our MDR ROI Calculator.
Read the latest security advisories, blogs, reports, industry publications and webinars published by eSentire's Threat Response Unit (TRU).
See why 2000+ organizations count on eSentire to build resilience and prevent business disruption.
THE THREAT
On February 4th, 2021, two separate zero-day vulnerabilities impacting the Chrome and Internet Explorer web browsers were announced.
Google confirmed a high severity vulnerability in Google Chrome that is tracked as CVE-2021-21148. The vulnerability is classified as Heap Buffer Overflow. While Google has stated there are reports of exploitation in the wild, no additional details have been provided at this time.
The South Korean cyber-security company ENKI confirmed the existence of a zero-day vulnerability affecting Internet Explorer 11, after they identified targeted attacks against their employees. The currently unnamed IE vulnerability is classified as a double-free vulnerability and has been exploited to exfiltrate victim information and deliver additional malicious content.
What we’re doing about it
What you should do about it
Additional information
CVE-2021-21148 is a heap buffer overflow vulnerability found in the V8 JavaScript engine used in the Chrome browser. Chrome updates are automatically applied to users but requires that end users close and restart Chrome.
The Internet Explorer zero-day was employed by suspected North Korean state- affiliated actors, in a previously reported campaign, targeting security researchers. The security researchers were targeted via social engineering attacks with malicious MHT/MHTML files. If the files are opened using Internet Explorer (the default application for MHT files), the user is prompted to allow script execution. If permission is given, a JavaScript payload would pull down additional malicious payloads including the IE zero-day exploit.
There is speculation that CVE-2021-21148 was exploited in this campaign. Links between exploitation of CVE-2021-21148 and this campaign have not been verified at this time.
References:
[1] https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_4.html
[2] https://enki.co.kr/blog/2021/02/04/ie_0day.html
[3] https://blog.google/threat-analysis-group/new-campaign-targeting-security-researchers/