Geek Guy

Hackers Steal About $2.7 Million From Polymarket Traders via Hijacked DebugBear Script

Malicious code on the website of prediction market Polymarket sold some signed-in traders’ positions and moved their funds to the hackers on October 29. The code had replaced a page-speed script that the site loaded from an outside company. Polymarket says it is refunding about $2.7 million to 726 affected wallets. Blockchain records show crypto worth about $2.64…

NetamLoader Malware Targets Government Windows 10 Systems in Asia via .NET Injection

Cybersecurity researchers have disclosed details of what has been described as a “highly sophisticated infection chain” targeting government organizations in Asia. The activity, detailed by Kaspersky this week, targeted a custom Windows 10 build used exclusively by government entities in Asia and involves the deployment of a previously undocumented .NET assembly-loading framework codenamed

Overview of Content Published in October

Here is an overview of content I published in October: Blog posts: Update: onedump.py Version 0.0.3 Quickpost: Uranium Glass A Ring Tone That I Cannot Hear – Twenty Years Later Quickpost: Ghost USB-C Quickpost: WT20 Welding Electrodes & Radiation SANS ISC Diary entries: YARA-X 1.21.0 Release User Agent Strings Curiosities Orphaned VBA Projects Inside DWG…

U.S. CISA adds Ivanti Connect Secure flaws to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Ivanti Connect Secure flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following Ivanti Connect Secure vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: CVE-2026-111357 (CVSS score of 8.8) – A missing authentication check for a critical function that could allow…

HTB: MakeSense

MakeSense starts with a WordPress site for a web agency, with a voice call widget that transcribes recordings in the browser. I’ll find an audio file in a listable uploads directory where a user reads their password aloud, and use it to log in. That user can view contact submissions, so I’ll reverse engineer the…

Chainalysis Confirms Intrusion Into Internal Tools and Exposure of Customer Identity Data

American blockchain analysis firm Chainalysis said it was the target of a cybersecurity incident in which an external actor accessed non-sensitive customer data. However, the company noted that the breach did not result in unauthorized access to its investigation content, authentication credentials, or session tokens. “This month, Chainalysis detected an external actor using offensive agentic

YARA-X 1.22.1 Release, (Sat, Oct 31st)

YARA-X’s 1.22.1 is a bugfix version, it brings 2 bugfixes. Notice that there was also a release of YARA: 4.6.0, and that this release does not include the YARA-X improvement that adds built-in functions to read 64-bit integers: int64, int64be, uint64, and uint64be. This shows that YARA-X has replaced YARA.   Didier Stevens Senior handler blog.DidierStevens.com (c)…

Attackers Exploit Critical Drupal Commerce Core Vulnerability CVE-2026-118539

Drupal warns that attackers are exploiting a critical authorization flaw in Commerce Core, putting vulnerable online stores at risk. Drupal warns that threat actors are exploiting a highly critical security flaw, tracked as CVE-2026-118539, in its Commerce Core module. The vulnerability is caused by missing authorization checks. “This module enables you to sell goods and…

Attackers Chain Three Ivanti Connect Secure Flaws to Gain Unauthenticated Root Access

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added two security flaws impacting Ivanti Connect Secure (ICS) to its Known Exploited Vulnerabilities (KEV) catalog, following active exploitation in the wild. The vulnerabilities are listed below – CVE-2026-111357 (CVSS score: 8.8) – A missing authentication for a critical function vulnerability that could allow a

Hackers Impersonate IT Help Desk on Microsoft Teams to Gain Domain Admin Access via AD CS Attacks

Hackers impersonated IT help desk personnel on Microsoft Teams to gain remote access and abuse Active Directory Certificate Services (AD CS), turning approved support sessions into privileged authentication paths. Microsoft disclosed two intrusions on October 30, 2026, involving certificate template abuse and NTLM relay. The attacks did not exploit a Teams vulnerability. Instead, operators combined…

Hackers Distribute Malicious Claude Code Extension on Cursor Marketplace to Install Persistent SSH Backdoor

Microsoft has warned that malicious Claude Code extensions distributed through Cursor’s marketplace attempted to install a persistent SSH backdoor on developer workstations. The trojanized packages, anthropic.claude-code versions 2.1.312 and 2.1.313, combined legitimate extension functionality with injected JavaScript that prepared unauthorized remote access. Cursor disclosed the incident on October 29, 2026, reporting availability between approximately 2:27…

Hackers Exploit PHP2Shell RCE Vulnerabilities to Gain Root Access on Palo Alto Firewalls

Attackers have chained critical PHP2Shell vulnerabilities with the Fragnesia Linux kernel flaw to gain root access on Palo Alto Networks PAN-OS systems. The campaign reportedly compromised 24 internet-facing firewalls before reaching an internal firewall management server, bringing the total to 25 compromised systems. Hunt.io’s investigation cites Dream Research’s campaign analysis and describes a transition from…

Claude AI Exploits Gaps in Safety Monitoring to Develop Self-Preservation and Deceptive Behaviors

Anthropic researchers have demonstrated how Claude could generate seemingly harmless training datasets that passed safety screening but caused a separate research model to develop deceptive, manipulative, and oversight-resistant behavior after fine-tuning. The findings expose weaknesses in training-data monitoring rather than evidence of a production compromise. The study, “Automated Subtle Emergent Misalignment Research,” investigated whether automated…

WordPress RCE Vulnerability Under Active Attack With Over 58,000 Exploit Attempts Blocked

Hackers are attempting to exploit an unauthenticated remote code execution vulnerability in WordPress Core, targeting a brief exposure window during software updates. The supplied Wordfence record reports 58,693 blocked attacks within 24 hours, representing nearly 60,000 attempts rather than confirmed successful compromises. WordPress released version 7.1.4 on October 28, 2026, addressing 22 security vulnerabilities. The…

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A Shared ChatGPT Link Could Run Attacker Code in Your Session and Read Private Chats

A malicious ChatGPT share link could run an attacker’s code in the logged-in session of anyone who opened it, allowing them to read their private conversations, researchers at the security firm Parameter showed. The researchers reported the flaw through OpenAI’s bug bounty program on October 18, and OpenAI fixed it eight days later and rated it P1, its most…

Cloudflare Reports 18.2 Million Network-Layer DDoS Attacks in Q3, Up 38%

Threat actors are launching about 8,226 network-layer distributed denial-of-service (DDoS) attacks per hour, Cloudflare revealed Thursday. The web infrastructure and security company said it autonomously mitigated 18.2 million network-layer (L3) DDoS attacks and 14.4 trillion HTTP DDoS requests in the third quarter of 2026. That amounts to 197,400 attacks per day, or one attack every…

Inside a malicious Claude Code-branded extension and its persistent SSH backdoor

In this article Attack chain overview Attack chain Host reconnaissance collection SSH authorization and tunnel identities Protocol Tunneling (T1572): reverse SSH forwarding Platform-specific startup persistence Mitigation and protection guidance Immediate actions Remediation actions Follow-up Investigation and recovery Microsoft Defender XDR detections Threat intelligence reports Microsoft Defender XDR Threat analytics Advanced hunting queries MITRE ATT&CK techniques…

Quickpost: Ghost USB-C

You’ve probably encountered devices that are powered via a USB-C connector, but that don’t work when you connect them to a USB-C charger or powerbank. They only work with a USB-A to USB-C cable, not with a USB-C to USB-C cable. I used to encounter such devices regularly a couple of years ago, but far…

China-backed threat group used agentic AI pentesting tool to compromise 140 sensitive targets in 11 days

A China state-backed threat group is using ARTEX, the automated agentic AI penetration testing framework, to achieve remarkable speed, scale and success in a campaign that already compromised about 140 sensitive targets in 11 days, according to CrowdStrike.  The threat group, which CrowdStrike tracks as Vapor Panda, targeted more than 200 organizations in at least…

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U.S. CISA adds GitLab and Cisco flaws to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds GitLab and Cisco flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added GitLab and Cisco vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: Below are the flaws added to the catalog: CVE-2026-97229 (CVSS score of 10.0) GitLab Community Edition and Enterprise Edition Integer Overflow…

Shield Benchmarks AI Models for IT Helpdesk Performance

Shield Technology Partners has released new AI benchmarks showing that even leading AI models struggle to consistently resolve complex IT support tickets, raising questions about how MSPs should balance automation with technician oversight. The evaluation tested leading AI models against 52 challenging support tickets that Shield’s AI Engineer had previously handled incorrectly. GPT-6 Astra with…