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Adversaries don’t work 9-5 and neither do we. At eSentire, our 24/7 SOCs are staffed with Elite Threat Hunters and Cyber Analysts who hunt, investigate, contain and respond to threats within minutes.
We have discovered some of the most dangerous threats and nation state attacks in our space – including the Kaseya MSP breach and the more_eggs malware.
Our Security Operations Centers are supported with Threat Intelligence, Tactical Threat Response and Advanced Threat Analytics driven by our Threat Response Unit – the TRU team.
In TRU Positives, eSentire’s Threat Response Unit (TRU) provides a summary of a recent threat investigation. We outline how we responded to the confirmed threat and what recommendations we have going forward.
Here’s the latest from our TRU Team…
In early February 2023, we reported that multiple threat groups were leveraging OneNote files for malware delivery. Qakbot was one such threat group and made up the majority of our observations of malicious OneNote files during this period.
Since mid-February, observations of Qakbot delivery via OneNote has faded in our telemetry while use of ISO image files has returned. The absence of OneNote malware in our telemetry suggests the technique is finding less success in circumventing perimeter gateways and content filters. The diminished use of OneNote by Qakbot during the week of February 20th is corroborated by public mentions (1, 2, 3) of ISO images in lieu of the aforementioned file type.
However, it’s unlikely OneNote has been completely abandoned and it remains probable that threat actors will continue to iterate on the technique to extend its shelf life.
Qakbot’s infection scheme, as observed on February 22, 2023, is summarized below and in Figure 1.
eSentire’s Threat Response Unit (TRU) is a world-class team of threat researchers who develop new detections enriched by original threat intelligence and leverage new machine learning models that correlate multi-signal data and automate rapid response to advanced threats.
If you are not currently engaged with an MDR provider, eSentire MDR can help you reclaim the advantage and put your business ahead of disruption.
Learn what it means to have an elite team of Threat Hunters and Researchers that works for you. Connect with an eSentire Security Specialist.
Our industry-renowned Threat Response Unit (TRU) is an elite team of threat hunters and researchers, that supports our 24/7 Security Operations Centers (SOCs), builds detection models across our Atlas XDR Cloud Platform, and works as an extension of your security team to continuously improve our Managed Detection and Response service. TRU has been recognized for its threat hunting, original research and content development capabilities. TRU is strategically organized into cross-functional groups to protect you against advanced and emerging threats, allowing your organization to gain leading threat intelligence and incredible cybersecurity acumen.