Last updated: September 29, 2026 at 8:42 AM UTC
All 891 Vulnerability 357 Breach 144 Threat 383 Defense 7

The Gentlemen ransomware adds worm-like spread, tops 478 victims

The Gentlemen, a ransomware-as-a-service operation tracked by Microsoft as Storm-2697, has been upgraded with a self-spreading mode and now claims 478 victims across dozens of countries and industries. Written in Go and obfuscated to evade analysis, its optional --spread switch turns a single-machine infection into a network worm that deploys the encryptor to every reachable system, using stolen or reused credentials to move laterally. A --wipe switch destroys recoverable data and forensic traces. On each host it disables Defender, weakens firewall and authentication settings, and adds scheduled tasks for persistence. Initial access often comes through compromised Fortinet edge-device credentials.

Check
Hunt for The Gentlemen's persistence markers (scheduled tasks named UpdateSystem or UpdateUser, Run keys GupdateS and GupdateU), and audit Fortinet edge devices for compromised or reused credentials.
Affected
Windows-based organizations, plus Linux, NAS, BSD, and ESXi systems; networks with flat segmentation and shared credentials are most exposed to the worm-like lateral spread.
Fix
Enforce unique credentials and phishing-resistant MFA, segment networks to limit lateral movement, keep offline tested backups, patch and monitor Fortinet edge devices, and harden Defender against tampering.

Attackers post fake breach notices to Maine's public disclosure portal

In an unusual misinformation campaign, fraudulent data-breach notices were submitted to Maine's official Attorney General breach portal and published before anyone verified them, forcing named companies to issue denials. One filing falsely claimed a Discord breach affecting more than 10 million people, submitted not by a company representative but by an individual using a personal Gmail address, a placeholder phone number, and impossible dates. Because the portal is public and a listing does not mean a breach is confirmed, the fakes can spread fear, damage reputations, and seed convincing phishing lures. It highlights how trusted disclosure channels can be weaponized.

Check
Monitor state breach-notification portals for filings naming your organization, and verify any breach claim about a vendor or partner through that company's official channels before acting on it.
Affected
Any organization that can be named in a fraudulent filing, and the public and journalists who treat a portal listing as confirmation; the underlying portal trust model is the weakness.
Fix
Establish monitoring and a rapid-denial process for fake filings, brief staff and customers to confirm breach notices via official sources, and press regulators to add basic submitter verification.

Cheap OnyxC2 service puts enterprise-grade data theft within easy reach

Researchers at BlackFog have detailed OnyxC2, a new malware-as-a-service sold on cybercrime forums that packages professional-grade data theft for as little as $250 a month, with a $500 premium tier adding hidden-desktop control and a $6,000 buyout option. It ships with a polished control panel and ready-made lures disguised as FinePrint, Windows Settings, a fake Windows update, and a game installer. Its payloads slipped past VirusTotal scanning when first uploaded and were still undetected weeks later, and builds use AES-256 encryption. The low price and turnkey design lower the barrier for less-skilled criminals to run capable infostealing campaigns.

Check
Watch endpoints for execution of lure-style installers impersonating FinePrint, Windows Settings, or Windows updates from untrusted sources, and hunt for unexplained outbound data transfers and hidden-desktop activity.
Affected
Organizations whose staff can be tricked into running disguised installers; the low cost and bundled lures widen the pool of attackers able to deploy capable infostealers.
Fix
Restrict software installation to approved sources, enforce application allow-listing and EDR with behavioral detection, train staff on disguised-installer lures, and monitor for and block anomalous data exfiltration.

China-linked JDY botnet scans US military networks for fresh flaws

Lumen's Black Lotus Labs warns that JDY, a covert botnet tied to Chinese state-linked groups including Volt Typhoon, has more than doubled to over 1,500 hacked home and small-office routers, firewalls, and IoT devices. Unlike a DDoS botnet, JDY is a distributed scanning network: it fingerprints exposed services across the internet and flags systems vulnerable to newly disclosed bugs, often within hours of disclosure. It keeps a heavy focus on the US, especially military and associated networks, and survived the 2024 FBI takedown of its parent KV-botnet. Because traffic comes from thousands of ordinary residential IPs, simple IP blocking does not stop it.

Check
Inventory internet-facing routers, firewalls, and IoT devices, especially Ubiquiti, DrayTek, Hikvision, and Linksys gear, for end-of-life models and missing patches that JDY scans for after disclosure.
Affected
Internet-exposed SOHO routers, firewalls, and IoT devices, particularly end-of-life hardware; US military and associated networks are a stated focus of the reconnaissance.
Fix
Patch edge devices promptly after vendor disclosures, replace end-of-life hardware, disable remote management where unneeded, and rely on behavioral rather than IP-based detection for scanning activity.

Cyberattack halts Australia's second-largest sugar producer mid-harvest

Mackay Sugar, Australia's second-largest sugar producer, has shut down two of its Queensland mills after a cybersecurity incident, halting production and stopping sugarcane harvesting at the peak of the season. The company confirmed the attack on Wednesday and has brought in outside cybersecurity experts and local authorities to investigate and restore systems. It has not yet said who was responsible or whether data was stolen, but the operational shutdown is consistent with a ransomware attack. The incident is the latest example of attackers disrupting food and agriculture operations, a sector whose industrial systems are increasingly targeted for maximum pressure.

Check
Food, agriculture, and manufacturing operators should review how cleanly their IT and operational-technology networks are separated, and confirm a ransomware shutdown of IT could not halt production lines.
Affected
Industrial and agricultural organizations where a compromise of business IT systems can cascade into operational-technology environments and force a full production shutdown, as happened at Mackay Sugar's mills.
Fix
Segment IT from operational-technology networks, keep offline tested backups, rehearse ransomware recovery for production systems, and pre-arrange incident-response and authority contacts before an attack hits.

Russia-aligned groups exploit old WinRAR flaw to hit Ukrainian targets

Trend Micro reports that at least two Russia-aligned groups, including Gamaredon, are exploiting a WinRAR flaw that was patched nearly a year ago to attack Ukrainian military and government organizations. The attacks start with emails carrying a booby-trapped RAR archive that abuses a path-traversal bug (CVE-2025-8088) to silently drop a malicious shortcut into the Windows Startup folder using NTFS Alternate Data Streams. One cluster, tracked by Ukraine's CERT-UA as UAC-0226, then installs an updated GiftedCrook stealer that grabs browser passwords, session cookies, and documents before deleting itself. The campaigns are a reminder that unpatched WinRAR remains a reliable foothold for attackers.

Check
Check the WinRAR version on Windows endpoints, and review email gateways and endpoint logs for inbound RAR archives and new shortcuts written to Startup folders via alternate data streams.
Affected
Windows systems with WinRAR versions before the CVE-2025-8088 fix, particularly organizations receiving RAR email attachments; Ukrainian government and military entities are the current targets.
Fix
Update WinRAR to the latest version that fixes CVE-2025-8088, block or sandbox inbound RAR attachments at the email gateway, and alert staff to unexpected archive lures.

New Shai-Hulud wave poisons 19 scientific Python packages on PyPI

The ongoing Shai-Hulud supply-chain campaign has struck again, this time trojanizing 19 Python packages on PyPI, many of them popular bioinformatics tools like Dynamo, Spateo, CoolBox, and Napari-UFISH that have been downloaded hundreds of thousands of times. Discovered by Socket, the wave pushed 37 malicious package versions from what looks like a single compromised maintainer, each carrying code that steals developer secrets such as cloud keys and tokens, then uses them to spread further. PyPI has quarantined affected releases. The credential-stealing behavior and tactics match earlier Shai-Hulud activity tied to the group TeamPCP, whose worm code leaked publicly last month.

Check
Search Python environments, lock files, and CI build logs for the 19 affected packages (including Dynamo, Spateo, CoolBox, U-FISH, Napari-UFISH) installed during the malicious window.
Affected
Developers and research teams that installed the trojanized versions of the 19 PyPI scientific packages, especially bioinformatics workflows pulling Dynamo, Spateo, CoolBox, U-FISH, or Napari-UFISH.
Fix
Remove the malicious versions and pin to known-good releases, then rotate every developer, cloud, and CI credential exposed on machines that installed them. Rebuild from trusted sources.

NFCShare Android malware poses as bank app updates to steal card data

Researchers at D3Lab warn that new versions of the NFCShare Android malware are spreading as fake updates for real banking apps, hosted on GitHub to look legitimate. Targeting customers of European banks, the malware shows a fake verification screen that tells victims to hold their payment card against the phone. It then uses the phone's NFC chip to read the card number, type, and expiry, and tricks the victim into typing their 4-digit PIN, sending it all to the attacker's server. That stolen data feeds NFC relay fraud, where criminals use it to make contactless payments or withdrawals. The malware only works if users sideload it.

Check
On managed Android devices, look for banking apps installed from outside Google Play and any app that requests an NFC card scan during a verification step.
Affected
Android users, mainly customers of European banks, who sideload fake banking app updates from GitHub or other non-Play sources and follow prompts to scan their cards.
Fix
Install banking apps only from Google Play, keep Play Protect enabled, and never scan a payment card or enter a PIN in response to an in-app verification prompt.

Meta disrupts new NSO spyware phishing aimed at WhatsApp users

Meta says it caught and shut down fresh spear-phishing attempts linked to Israeli spyware maker NSO Group that tried to lure WhatsApp users into clicking malicious links leading to sites outside the app, mirroring the one-click attacks NSO has used to plant its Pegasus spyware. Meta also found and removed NSO-created test accounts and groups, and published the malicious domains involved. The company is now asking a US federal court to hold NSO in contempt for violating the permanent injunction issued last year barring it from targeting WhatsApp. High-risk users such as journalists, activists, and officials are the usual targets of this kind of mercenary spyware.

Check
Block the NSO-linked phishing domains Meta published at your web and DNS gateways, and review whether high-risk staff received WhatsApp messages pushing links to external sites.
Affected
WhatsApp users targeted by one-click social-engineering links, especially high-risk individuals like journalists, activists, and government officials who are typical mercenary-spyware targets.
Fix
Avoid clicking links in unsolicited WhatsApp messages, enable Lockdown Mode on iOS and Android for high-risk users, keep devices fully updated, and block the published malicious domains.

New C0XMO botnet exploits DD-WRT router flaw, wipes rival malware

Fortinet has uncovered a new botnet called C0XMO, built from the long-running Gafgyt malware family, that breaks into devices by exploiting an old flaw (CVE-2021-27137) in the UPnP service of DD-WRT router firmware. A booby-trapped network request gives the attacker code execution with no login needed. Once in, C0XMO digs in with hidden files and cron jobs that re-run it every 15 minutes, then hunts down and deletes rival botnets and even researchers' security tools to keep the device to itself. A separate scanner spreads it across many chip types (ARM, MIPS, x86, and more), and infected devices are wired up to launch 19 kinds of denial-of-service floods.

Check
Audit routers and IoT devices for DD-WRT firmware vulnerable to CVE-2021-27137, and hunt Linux hosts for hidden .sys files, 15-minute cron jobs, and modified shell profiles.
Affected
DD-WRT router firmware with the vulnerable UPnP/SSDP service (CVE-2021-27137) reachable on UDP port 1900, plus Linux and IoT devices with weak Telnet or SSH credentials.
Fix
Update DD-WRT firmware to a fixed build, disable UPnP and internet-facing Telnet/SSH, set strong unique admin credentials, and remove the malware's cron jobs and hidden payloads.