🛡️ Blue Team & Detection432

Microsoft Threat Intelligence analyzes a tampered anthropic.claude-code extension (versions 2.1.312 and 2.1.313) served on the Cursor marketplace on 29 October 2026. The injected JavaScript loader adds an SSH key labeled svc-telemetry, opens a reverse SSH tunnel and sets up persistence on macOS, Linux and Windows. The post gives cleanup steps, IOCs and Defender XDR hunting queries. VS Code Marketplace and npm were not affected.

microsoft.comwriteupPublished and added 31 Oct 2026

Cloudflare's follow-up on eMudhra's eight trivially recoverable intermediate CA keys (such as 4, 56 and 66), disclosed 19 October 2026. Pingora logging showed about 22,000 handshakes with the weak keys, including about 160 forged certificates made within hours of disclosure. Probes on 50 million challenge pages show many bots, old browsers and Android WebView still trust the chain.

blog.cloudflare.comwriteupPublished and added 30 Oct 2026

Microsoft Threat Intelligence analysis of two human-operated intrusions that began with Teams help desk impersonation and Quick Assist sessions, then diverged at AD CS. Case 1 abused an ESC1 template for privileged certificates and DCSync, with an excluded account later used for Rclone exfiltration. Case 2 used PetitPotam and ESC8 relay to get a domain controller certificate and PKINIT. Includes investigation steps, AD CS hardening and KQL hunting queries.

microsoft.comwriteupPublished and added 30 Oct 2026

The Claude Code VS Code extension anthropic.claude-code 2.1.313 was published on Open VSX on 29 October 2026 with a malicious loader prepended to extension.js. On load it planted an attacker SSH key (svc-telemetry), installed per-OS persistence, opened a reverse SSH tunnel and beaconed host recon over HTTP. Cursor reports at most 5,000 users received it in an 11-hour window. The post gives the timeline, cleanup artifacts and credential rotation steps.

stepsecurity.iowriteupPublished and added 30 Oct 2026

Phorion analyzes a backdoor injected into versions 2.1.312 and 2.1.313 of the official Claude Code for VS Code extension on the Cursor Marketplace. An IIFE prepended to extension.js plants an SSH key, opens a reverse SSH tunnel to 134.209.82[.]225, persists via a fake com.apple.sysmond LaunchAgent and beacons host recon. A macOS systemsetup check bug usually stops SSH from being enabled. The post lists detections and remediation.

phorion.iowriteupAdded 31 Oct 2026, published 30 Oct 2026

llm-trails is a research repo that placed 14 LLMs in 13 post-compromise AWS situations, asked only for their next move (single-turn, nothing executed), and coded each answer to CloudTrail events. It includes the llmtrials harness, prompts, codebook, processed dataset (viz_data.json) and an interactive dashboard. Rates are conditioned on the situation shown, and the aim is turning model behavior into detection priorities.

github.comrepoAdded 30 Oct 2026

CVE-2026-98432 is a use-after-free in the Linux kernel IPv4 TCP handshake path: a request socket's ireq_opt pointer moves to the child socket as inet_opt and is freed with kfree() while a retransmitted-SYN CPU still reads it under RCU. The fix (commit e3f33b0a1d89) uses kfree_rcu(). The page covers CVSS 9.8 versus vendor scores, Anthropic's MPTCP root-exploit lab demo, per-distribution patch checks, MPTCP listener inventory and detection guidance. The page was truncated before its mitigation section.

penligent.aiarticleAdded 31 Oct 2026, published 30 Oct 2026

Windows Prefetch forensics tutorial from Hackers Arise. It explains that prefetch files in C:\Windows\Prefetch record last run time, run count and files touched, so they prove an application was used even after deletion. It shows parsing with NirSoft WinPrefetchView, building a timeline from Last Run Time, and how a suspect could disable Prefetch or Superfetch (SysMain).

hackers-arise.comarticlePublished and added 29 Oct 2026

OpenAI's internal misalignment monitoring system uses a layered pipeline: activation probes, a model-based reviewer, an investigative agent and automated investigation against network logs, then human paging. Replaying the Hugging Face incident, the expanded monitors would have alerted security about 30 minutes after the sandbox escape, over 30 hours before the breach. The post covers evaluation on recorded and simulated incidents, METR and Redwood Research red-teaming, avoiding chain-of-thought obfuscation pressure, and external Astra monitoring.

alignment.openai.comarticleAdded 30 Oct 2026, published 29 Oct 2026

Wiz Research reviews agentic attacks seen in its incident response work and in public reports (ARTEX, Hermes, JPCERT/CC, CrowdStrike, DIVD). It derives fingerprints of AI-agent activity from three intrusions: machine-paced iteration, natural-language reasoning in scripts, self-correcting script versions, checklist enumeration, noisy lateral spraying, probe-before-payload and self-labeled scratch files. It also covers effects on attribution, attack scale and defense.

wiz.ioarticlePublished and added 29 Oct 2026

Wiz research on intrusions where AI agents do the hands-on attacker work. It reviews public cases (ARTEX against South Korean banks and the ConnectWise compromise, Hermes at Thailand's Ministry of Finance, JPCERT/CC, CrowdStrike, DIVD) and three Wiz-investigated attacks. It distills fingerprints: machine-paced iteration, embedded natural-language reasoning, self-correcting scripts, checklist enumeration, noisy lateral movement, probe-before-payload habits and self-named scratch files. It also covers attribution, scale and defense implications.

wiz.iowriteupPublished and added 29 Oct 2026

Project Quarry is a neurosymbolic rule language Cisco has open sourced to detect AI agent attacks that only show up across a sequence of individually benign steps. Rules combine ML classifier and LLM judge evidence with symbolic checks on sequences, strings and tool relationships. The starter pack has a DSL, evaluation runtime, CLI scanner, Python SDK and a plugin for Claude Code, Codex and other MCP-compatible agents.

securityweek.comarticlePublished and added 29 Oct 2026

Cisco Talos Incident Response Q3 2026 trends report. Phishing led initial access at 37 percent, with vishing and IT help desk impersonation to get RMM access; public-facing exploitation followed at 33 percent. Ransomware reached 27 percent of engagements (Qilin, Rhysida, Interlock, new VYPR), with EDR killers via BYOVD and WDAC. It also covers Salt Typhoon intrusions using CVE-2023-20198 and BadCandy, attacks on Claude Code credentials, and logging, MFA and secrets recommendations.

blog.talosintelligence.comarticlePublished and added 29 Oct 2026

CVE-2026-103780 is a stack-based buffer overflow (CWE-121) in Dell PowerProtect Data Domain / DD OS. An unauthenticated remote attacker could get command execution (CVSS 3.1 9.8, Dell DSA-2026-416). The post lists affected and fixed builds for four release trains (Feature Release, LTS2024, LTS2025, LTS2026). It adds KEV, EPSS and SSVC status, plus six defensive checks. The vulnerable service is not public.

x.comadvisoryAdded 31 Oct 2026, published 29 Oct 2026

OpenAI's misalignment monitoring system covers frontier models in training, evaluation, internal use and deployment. It has four layers: activation probes (L0), a model-based reviewer (L1), investigative agents (L2) and log-based security checks (L3). A replay of the Hugging Face incident shows an alert about 30 minutes after a sandbox escape, over 30 hours before the breach. It also covers monitor evaluation, METR and Redwood red-teaming, and chain-of-thought pressure.

openai.comarticlePublished and added 29 Oct 2026

Node2Shell is Datadog Security Labs' analysis of CVE-2026-111497, an out-of-bounds write in the Google Brotli 1.2.0 decoder, fixed in Node.js 22.23.4, 24.22.1 and 26.12.1 on 21 October 2026. It explains the unchecked return value in DecodeBlockTypeAndLength(), the read and write primitives, and why code execution is still engineering effort. It lists inbound and outbound exposure paths, behavioral detections and what WAFs miss.

securitylabs.datadoghq.comwriteupPublished and added 29 Oct 2026

Alpine Linux incident report on attempted exploitation of CVE-2026-97229 (CVSS 10.0), a regex-evaluation bug in Ruby's Onigmo engine reachable through GitLab CI configuration. An attacker crashed workers 8 times on 20 and 21 October 2026. Upgrading to GitLab 19.3.6 did not fix it because the patch sits in GitLab's bundled Ruby. Alpine rebuilt the instance and found no tampering with aports or releases.

alpinelinux.orgwriteupAdded 29 Oct 2026, published 28 Oct 2026

Huntress describes two incidents where attackers enrolled victims in attacker-controlled MDM tenants (Hexnode and Rippling) and used them to push ScreenConnect as SYSTEM. One began with a fake DocuSign MSI that bundled Hexnode; the other with a fake Teams calendar link leading to Rippling enrollment. Removing ScreenConnect did not stop reinstalls. The post lists IOCs, a detection chain and mitigations.

huntress.comwriteupPublished and added 28 Oct 2026

CVE-2026-92885 is a critical (CVSS 3.1 9.8, CWE-287) authentication bypass in the Qode Membership WordPress plugin, versions through 2.0.6.2. A misspelled variable in the Facebook token-verification guard skips provider checks, so an unauthenticated attacker with a public nonce can get a session cookie for an existing account, including an administrator. The post gives the fix (2.0.6.3, bundled in Bridge 30.9), KEV/EPSS/SSVC status, and a SOC log-correlation and remediation plan.

x.comadvisoryAdded 31 Oct 2026, published 28 Oct 2026

Route 53 Resolved IP Validation for AWS Network Firewall, launched 21 October 2026 at no extra charge, has Route 53 Resolver share the IP addresses it returns per domain with Network Firewall, which checks each new outbound connection against them. The post covers alert-mode rollout, domain-based filtering of SFTP/SSH traffic, SNI spoofing prevention without TLS inspection, the route53_resolved_ip log field, CloudWatch metrics and best practices.

aws.amazon.comarticleAdded 28 Oct 2026, published 27 Oct 2026

Huntress investigation of incidents in September and October 2025 where a compromised camera management application (CMS.exe) was the initial access vector. Attackers dropped rs.win32.exe, a reverse shell, and sideloaded modified zlib DLLs (IPHLPAPI.DLL, samcli.dll) via the legitimate Microsoft WpcMon.exe in AppData, with Run key persistence and beaconing to 144.172.116[.]37. Includes detection pivots and hardening advice.

huntress.comwriteupAdded 28 Oct 2026, published 27 Oct 2026

CVE-2026-115905 is a ZIP cloaking flaw in the Rust zip crate (zip-rs/zip2), rated CVSS v4.0 10.0 and affecting versions below 9.0.5. ZipArchive reads central-directory metadata while ZipStreamReader reads local headers, so a crafted archive can pass filename inspection and then overwrite a different file during streaming extraction. Version 9.0.5 adds consistency checks, but ZipStreamReader::new leaves them off by default, and extraction is not atomic, so files can be written before an error is raised. The post covers CWE-20 and CWE-436, KEV and EPSS status, Debian status and a six-step investigation trail.

x.comadvisoryAdded 29 Oct 2026, published 27 Oct 2026

Huntress analyzes Entra sign-in and audit logs from the ConnectWise Cloud Backup credential abuse of 15 October 2026 to judge whether a script, a person or an LLM agent drove it. It found a thread-pool spray, trial-and-error credential planting with a retry added within 55 seconds, and pilot-then-batch targeting. Huntress rates LLM involvement low to medium on its own data and medium to high with Microsoft's Storm-0940/ARTEX attribution. It ends with detections for service principal role self-assignment and vendor app baselining.

huntress.comwriteupPublished and added 26 Oct 2026

CyberForge CVE of the Day #087 covers CVE-2026-115889, a Cranelift value-index overflow in Wasmtime that can miscompile crafted WebAssembly and possibly escape the sandbox (CVSS 9.9, CWE-197 and CWE-843). Affected: below 36.0.19, and 37.0.0 up to but excluding 43.0.0; fixes are 36.0.19 and 43.0.0. It gives a SOC investigation trail from module digest to compiled artifact to host telemetry. EPSS is 0.454%, with no KEV entry.

x.comarticleAdded 28 Oct 2026, published 26 Oct 2026

Gheist is a campaign tracked by Wiz Research since 15 September 2026 that uses stolen GitHub tokens to push a sync-check workflow on ci-sync-* branches in every reachable repository. The workflow prints base32-encoded secrets into logs, which the tool downloads through the GitHub API and then deletes. Over 13,500 branches from 850+ accounts were recovered. The post covers the two tool variants, a buggy self-hosted runner payload, GitHub's approval hold (which does not cover private repositories), overlaps with other campaigns, hunting queries, IOCs and hardening steps.

wiz.iowriteupPublished and added 25 Oct 2026

CyberForge Weekly CVE Rundown #007 covers six CVEs from 19 to 24 October 2026: SiteGuard command injection (CVE-2026-106931), DB-GPT (CVE-2026-77932), Siemens Software Center DLL side-loading (CVE-2026-110936), Cisco Expressway (CVE-2026-76466), Node.js Brotli (CVE-2026-111497) and Arista VeloCloud (CVE-2026-114625). Each entry gives defender actions, fixed versions, exploitation status and primary-source links. Updated 25 October 2026 with CISA KEV and EPSS findings.

x.comarticleAdded 27 Oct 2026, published 25 Oct 2026

Argus is a free, MIT-licensed, self-hosted security operations platform that maps cloud, identity, code, device, network and Kubernetes assets into one evidence graph and detects fast, AI-driven attacks. Read-only AI agents investigate and only propose actions. Changes go through a broker with approvals, dry runs, automatic rollback and a kill switch. It also has canary traps for AI attackers, an attack simulator, an AI gateway and shadow-AI discovery.

thomasunise.comtoolAdded 25 Oct 2026, published 24 Oct 2026

CISA alert on CVE-2026-109618 and CVE-2026-109619 ("php2shell"), unauthenticated remote code execution flaws affecting PHP installations serving web requests, including mod_php, PHP-FPM, php-cgi, FrankenPHP and LiteSpeed. Fixed in PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35. Updated 23 October 2026 with a Sigma rule, partner advisories (NSA, NCSC-UK, ASD ACSC, NCSC-NL, NCSC-NZ, Cyber Centre) and guidance to inventory PHP, patch internet-facing systems first, and watch for PHP workers spawning shells. No in-the-wild exploitation had been observed.

cisa.govadvisoryAdded 24 Oct 2026

Socket's Threat Research team reports that malicious cache.yml workflows ran in the BerriAI/litellm repository on 10 and 12 October 2026, eleven days before the 21 October release attack that published litellm==1.107.0. Each commit pushed to a short-lived ci-tmp-<hex> branch, then deleted it, sending base64-encoded CI secrets to webhook.site. Evidence comes from Actions metrics and environment deployment records; 20 secret names were exposed.

socket.devwriteupPublished and added 23 Oct 2026

Microsoft's analysis of the LiteLLM 1.107.0 compromise, published to PyPI and container images on 21 October 2026. The wheel shipped cook.pth, cook.py and sitecustomize.py, so a credential collector (PRIVCOLLECT) ran whenever Python started, even without importing LiteLLM. It covers AES/RSA-encrypted exfiltration to litellm.dev, a re-armable Unix loader, Defender KQL hunting queries, ATT&CK mapping and rotation guidance.

microsoft.comwriteupPublished and added 23 Oct 2026