Chasing Eddies: New Rust-based InfoStealer used in CAPTCHA campaigns
Elastic Security Labs walks through EDDIESTEALER, a lightweight commodity infostealer used in emerging CAPTCHA-based campaigns.
De-obfuscating ALCATRAZ
An exploration of techniques used by the obfuscator ALCATRAZ.
Misbehaving Modalities: Detecting Tools, Not Techniques
We explore the concept of Execution Modality and how modality-focused detections can complement behaviour-focused ones.
Bit ByBit - emulation of the DPRK's largest cryptocurrency heist
A high-fidelity emulation of the DPRK's largest cryptocurrency heist via a compromised macOS developer and AWS pivots.
Outlaw Linux Malware: Persistent, Unsophisticated, and Surprisingly Effective
Outlaw is a persistent Linux malware leveraging simple brute-force and mining tactics to maintain a long-lasting botnet.
The Shelby Strategy
An analysis of REF8685's abuse of GitHub for C2 to evade defenses.
Shedding light on the ABYSSWORKER driver
Elastic Security Labs describes ABYSSWORKER, a malicious driver used with the MEDUSA ransomware attack-chain to disable anti-malware tools.
AWS SNS Abuse: Data Exfiltration and Phishing
During a recent internal collaboration, we dug into publicly known SNS abuse attempts and our knowledge of the data source to develop detection capabilities.
Detecting Hotkey-Based Keyloggers Using an Undocumented Kernel Data Structure
In this article, we explore what hotkey-based keyloggers are and how to detect them. Specifically, we explain how these keyloggers intercept keystrokes, then present a detection technique that leverages an undocumented hotkey table in kernel space.
Linux Detection Engineering - The Grand Finale on Linux Persistence
By the end of this series, you'll have a robust knowledge of both common and rare Linux persistence techniques; and you'll understand how to effectively engineer detections for common and advanced adversary capabilities.
Emulating AWS S3 SSE-C Ransom for Threat Detection
In this article, we’ll explore how threat actors leverage Amazon S3’s Server-Side Encryption with Customer-Provided Keys (SSE-C) for ransom/extortion operations.
You've Got Malware: FINALDRAFT Hides in Your Drafts
During a recent investigation (REF7707), Elastic Security Labs discovered new malware targeting a foreign ministry. The malware includes a custom loader and backdoor with many features including using Microsoft’s Graph API for C2 communications.