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The Permanent Threat: Analyzing Aeternum’s Blockchain-Based C2 Operations and Communications

Analysis of the Aeternum botnet loader, a threat leveraging Polygon blockchain smart contracts for decentralized C2 infrastructure and payload execution.

The post The Permanent Threat: Analyzing Aeternum’s Blockchain-Based C2 Operations and Communications appeared first on Unit 42.

Almost Half of Malware Samples Communicate Direct to IP

Nearly half of C2 malware bypasses DNS by connecting directly to IP addresses. Zero trust IP enforcement secures networks against these threats.

The post Almost Half of Malware Samples Communicate Direct to IP appeared first on Unit 42.

Pass the Passkey: A Novel Attack Surface in Passwordless Authentication

Explore how passkey implementation gaps undermine security when relying parties fail to validate the User Verified flag, reducing MFA to a single factor.

The post Pass the Passkey: A Novel Attack Surface in Passwordless Authentication appeared first on Unit 42.

The Xcode Assassin Returns: A Deep Dive Into the Latest XCSSET Version

Analysis of XCSSET v40 reveals a macOS malware targeting developers via Xcode. Unit 42 used advanced pattern matching and AI to decode its logic.

The post The Xcode Assassin Returns: A Deep Dive Into the Latest XCSSET Version appeared first on Unit 42.

TuxBot v3: Inside an IoT Botnet Framework With LLM-Assisted Development

TuxBot v3 Evolution, an IoT botnet framework built with LLMs. Read our analysis of its cross-compiled binaries, C2 architecture and bugs.

The post TuxBot v3: Inside an IoT Botnet Framework With LLM-Assisted Development appeared first on Unit 42.

Vidar Stealer Unmasked: Code Signing Abuse, Go Loaders and File Inflation

A cybercrime campaign combined a loader-as-a-service framework and DLL sideloading via a Go-compiled fake MpClient.dll, a novel evasion layer combination.

The post Vidar Stealer Unmasked: Code Signing Abuse, Go Loaders and File Inflation appeared first on Unit 42.

CL-STA-1062 Targets Southeast Asian Governments and Critical Infrastructure

Government entities and critical infrastructure were targeted for espionage in SE Asia by attackers using a hybrid toolkit, including custom TinyRCT backdoor.

The post CL-STA-1062 Targets Southeast Asian Governments and Critical Infrastructure appeared first on Unit 42.

OpenClaw’s Skill Marketplace and the Emerging AI Supply Chain Threat

Unit 42's analysis of ClawHub revealed evasive malicious skills bypassing automated scanners to deploy infostealers and execute agentic financial fraud.

The post OpenClaw’s Skill Marketplace and the Emerging AI Supply Chain Threat appeared first on Unit 42.

Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor

Operation FlutterBridge is a malvertising campaign targeting macOS users. It distributed the new backdoor FlutterShell, built using the Flutter framework.

The post Operation FlutterBridge: macOS Malvertising Campaign Spreads New FlutterShell Backdoor appeared first on Unit 42.

Tracking Iranian APT Screening Serpens’ 2026 Espionage Campaigns

Unit 42 details Screening Serpens' use of AppDomainManager hijacking and new RAT variants to target tech and defense sectors in recent campaigns.

The post Tracking Iranian APT Screening Serpens’ 2026 Espionage Campaigns appeared first on Unit 42.

Tracking TamperedChef Clusters via Certificate and Code Reuse

Unit 42 analyzes TamperedChef malware clusters that use trojanized productivity apps and malvertising to deliver stealthy payloads to targets.

The post Tracking TamperedChef Clusters via Certificate and Code Reuse appeared first on Unit 42.

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