Stay ahead of threats with the latest on evasion techniques in infosec. Insights on how attackers bypass defenses and updates on countermeasures.
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Background for this topic.
Evasion is the deliberate concealment or modification of malicious code, commands, traffic, or behavior to bypass security controls and avoid detection. Common examples include code obfuscation, encrypted or rapidly changing payloads, abuse of trusted system tools, and disguising command-and-control traffic as ordinary network activity. It can target antivirus signatures, email and web filters, endpoint monitoring, or analysts investigating suspicious activity.
Successful evasion can reduce visibility, delay detection, and allow unauthorized activity to continue, although it may still leave behavioral or operational evidence. Mitigation should combine signature detection with behavior-based analytics and reliable endpoint, identity, and network telemetry. Restricting unnecessary scripting and administrative tools, applying application controls, and protecting centralized logs make abuse harder and preserve evidence. During investigations, examine process ancestry, unusual tool use, persistence changes, and deviations from expected user or host behavior rather than relying solely on file hashes or other easily changed indicators.
The JavaScript (aka JScript) malware loader called GootLoader has been observed using a malformed ZIP archive that's designed to sidestep detection efforts by concatenating anywhere from 500 to 1,000 archives
The Gootloader malware, typically used for initial access, is now using a malformed ZIP archive designed to evade detection by concatenating up to 1,000 archives. [...]
Also: NodeCordRAT Malware, North Korean QR-Phishing CampaignThis week, U.K. crypto exchanges linked to Iranian sanctions evasion, NodeCordRAT malware spread via npm, an FBI alert on North Korean QR-code phishing, illicit crypto hit $154 billion in 2025 and U.S. President Donald Trump said he won't pardon Sam Bankman-Fried.
Security experts have disclosed details of an active malware campaign that's exploiting a DLL side-loading vulnerability in a legitimate binary associated with the open-source c-ares library to bypass security controls and deliver a wide range of commodity trojans and stealers
New crooks on the block get crafty with blockchain to evade defenses Researchers at Group-IB say the DeadLock ransomware operation is using blockchain-based anti-detection methods to evade defenders' attempts to analyze their tradecraft.…
The phishing campaign shows how attackers continue to weaponize legitimate cloud services and open source tools to evade detection and gain trust.
Threat actors exploited Cloudflare's free-tier infrastructure and legitimate Python environments to deploy the AsyncRAT remote access trojan, demonstrating advanced evasion techniques that abuse trusted cloud services for malicious operations.