The eSentire Blog

Threat Response Unit

5 M

Responding to the Klue Incident:

OverviewA supply chain attack against competitive intelligence platform Klue led to unauthorized access to…

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TRU Positive/Bulletin

17 M

Fortinet Vulnerability CVE-2026-35616 and EKZ Stealer, Attacking Obfuscating Compilers with Binary Ninja Workflows

What did we find?In May 2026, eSentire's Threat Response Unit (TRU) detected EKZ Stealer within a customer…

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TRU Positive/Bulletin

25 M

Nimbus RAT: How Threat Actors Are Abusing Microsoft Teams and Google Drive to Deploy a Java RAT

What did we find?In early April 2026, eSentire's Threat Response Unit (TRU) identified an intrusion targeting a…

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Offensive Security

28 M

Amatera Stealer 4.0.2 Beta: What's New in This Variant

What did we find?In late April 2026, eSentire's Threat Response Unit (TRU) intercepted an attempted delivery of…

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TRU Positive/Bulletin

26 M

Tycoon 2FA Operators Adopt OAuth Device Code Phishing

What did we find?In late April 2026, the eSentire Threat Response Unit (TRU) analyzed a phishing campaign that…

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Threat Response Unit

3 M

Six Days Ahead: How eSentire Detected NetScaler Exploitation Before the Industry Caught Up

On April 2, 2026, eSentire’s Threat Response Unit (TRU) identified active exploitation attempts targeting Citrix…

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TRU Positive/Bulletin

33 M

Multi-Stage SEO Poisoning Campaign Targets Chinese-Speaking Developers with Kong RAT

What did we find?In March 2026, eSentire's Threat Response Unit detected a sophisticated multi-stage malware…

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AI/ML

7 M

eSentire in the Age of AI-Driven Threats

Last month, Anthropic disclosed that its Claude Mythos model had autonomously discovered thousands of zero-day…

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TRU Positive/Bulletin

9 M

Tycoon 2FA Infrastructure Update: Threat Actors Adapt Following Global Coalition Takedown

What did we find?Following the organized global coalition takedown of Tycoon 2FA phishing infrastructure led by…

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TRU Positive/Bulletin

16 M

EtherRAT & SYS_INFO Module: C2 on Ethereum (EtherHiding), Target Selection, CDN-Like Beacons

What did we find?In March 2026, eSentire's Threat Response Unit (TRU) detected EtherRAT in a customer's…

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TRU Positive/Bulletin

9 M

MuddyWater APT + Tsundere Botnet: EtherHiding the C2

What did we find?In March 2026, eSentire's Threat Response Unit (TRU) investigated an open-directory web server…

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TRU Positive/Bulletin

23 M

North Korean APT Malware Analysis: DEV#POPPER RAT and OmniStealer (Everyday I'm Shufflin')

What did we find?In February 2026, eSentire's Threat Response Unit (TRU) detected DEV#POPPER, a sophisticated…

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