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Oct 19, 2021
Hackers Infect Employees of Law Firms, Manufacturing Companies, and Financial Services Orgs. with Increasingly Pervasive Infostealer, SolarMarker
SolarMarker Infects 5X More Corporate Victims Using Over a Million Poisoned WordPress Pages Key Takeaways eSentire has observed a fivefold increase in SolarMarker infections. Prior to September, eSentire’s Threat Response Unit (TRU) detected and shut down one infection per week. Beginning in September, TRU averaged the detection and shutdown of five per week. SolarMarker is a…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1000+ organizations in 70+ 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.
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eSentire Launches MDR with Microsoft Azure Sentinel Extending Response Capabilities Across Entire Microsoft Security Ecosystem
Waterloo, ON – Oct. 12, 2021 -- eSentire, recognized globally as the Authority in Managed Detection and Response (MDR), today announced the expansion of its award-winning MDR services with Microsoft Azure Sentinel, as part of its integration with the complete Microsoft 365 Defender and Azure Defender product suites supporting Microsoft SIEM, endpoint, identity, email and cloud security services.…
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Security advisories — Jun 30, 2021

Windows Print Spooler Vulnerability Exploit Code Released

THE THREAT

Proof-of-Concept (PoC) exploit code for the critical Windows vulnerability CVE-2021-1675 has been identified in the wild. CVE-2021-1675, also known as PrintNightmare, was disclosed and patched by Microsoft on June 8th, in the June 2021 Patch Tuesday security release. The vulnerability is classified as Remote Code Execution (RCE). Exploitation could allow a threat actor to take full control of vulnerable systems. Currently there is no indication of exploitation of the PrintNightmare vulnerability in the wild.

The public release of PoC code significantly reduces the barriers for exploitation. Due to this release, attacks in the wild are expected in the immediate future. Organizations are strongly recommended to apply the relevant security patches.

What we’re doing about it

What you should do about it

Updated July 1st, 2021

Additional information

The PoC exploit code was originally planned to be released by a security firm at BlackHat USA but was released in error on June 29th. The code was publicly available for multiple hours before being taken down. The security company plans to officially release the code and additional details at BlackHat USA in July 2021. eSentire has confirmed that despite the code takedown, it was copied and remains publicly available.

CVE-2021-1675 (CVSS: 7.8) is classified as a Windows Print Spooler Remote Code Execution vulnerability. A threat actor with local access to a vulnerable asset may exploit this vulnerability for code execution, lateral movement, and privilege escalation. In an attack scenario threat actors may exploit the vulnerability via previous access, remotely via SSH (using credentials), or through a malicious document (with user interaction).

Impacted products:

References:

[1] https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-1675
[2] https://www.kb.cert.org/vuls/id/383432
[3] https://docs.microsoft.com/en-us/defender-for-identity/cas-isp-print-spooler