Fast16 is a pre-Stuxnet malware that tampered with precision software and spread itself. Evidence suggests links to U.S. operations during early cyber tensions.

SentinelOne uncovered Fast16, a sabotage malware used in 2005, years before Stuxnet. The malicious code is written in Lua and targeted high-precision calculation software, altering results and spreading across systems. The malware appeared in the ShadowBrokers leak of NSA tools, and evidence suggests it may have been developed by the United States, highlighting early cyber operations linked to tensions with Iran.

Researchers traced early advanced malware design by searching for the first use of embedded Lua engines, a feature later seen in tools like Flame and Project Sauron. Lua enables modular, flexible malware without recompilation. The analysis led to a 2005 sample, svcmgmt.exe, which contained an embedded Lua VM and encrypted bytecode. Though it looked like a simple service binary, deeper analysis revealed a sophisticated implant with encryption, Windows API access, and modular design. A debug path linked it to the fast16.sys driver, tying it to the early Fast16 framework.

The carrier svcmgmt.exe acts as a modular loader, using encrypted Lua payloads and “wormlets” to spread across Windows systems via network shares, while avoiding detection by checking for security tools. It can also deploy the kernel driver for deeper control.

The fast16.sys driver loads at boot and intercepts filesystem operations, modifying executable files in memory. It targets specific programs, especially precision calculation software compiled with Intel tools, and applies rule-based patches that subtly alter results using floating-point manipulation.

“The FPU patch in fast16.sys was written to corrupt these routines in a controlled way, producing alternative outputs. This moves fast16 out of the realm of generic espionage tooling and into the category of strategic sabotage.” continues the report. “By introducing small but systematic errors into physical‑world calculations, the framework could undermine or slow scientific research programs, degrade engineered systems over time or even contribute to catastrophic damage.”

This suggests a sabotage goal rather than simple espionage, aiming to corrupt scientific or engineering outputs while remaining stealthy and persistent across infected systems.

“A sabotage operation of this kind would be foiled by verifying calculations on a separate system. In an environment where multiple systems shared the same network and security posture, the wormable carrier would deploy the malicious driver module to those systems as well, reducing the chance that an independent calculation would diverge from the corrupted output.” reads the report published by SentinelOne. “At this time, we’ve been unable to identify all of the target binaries in order to understand the nature of the intended sabotage.”

Fast16 most likely targeted high-precision engineering and simulation software used in the mid-2000s, based on pattern matching of its patching rules. The strongest candidates include LS-DYNA 970 (used for crash, explosion, and structural simulations, including sensitive defense-related research), PKPM (a widely used Chinese structural design and seismic analysis suite), and MOHID (a hydrodynamic modeling platform for coastal and environmental simulations).

Analysis of compiler artifacts inside the malware suggests it came from an older, security-focused Unix engineering culture, with traces of SCCS/RCS versioning conventions unusual in Windows malware of that era. This points to a long-running, well-resourced development effort rather than opportunistic tooling.

The overall design of fast16 combines a Lua-based carrier, a kernel-level filesystem driver, and rule-based code patching. This structure enables controlled corruption of numerical outputs in specialized simulation software, potentially altering results in fields like structural engineering, physics modeling, and environmental analysis.

“This 2005 attack is a harbinger for sabotage operations targeting ultra expensive high-precision computing workloads of national importance like advanced physics, cryptographic, and nuclear research workloads.” concludes the report. “fast16 predates Stuxnet by at least five years, and stands as the first operation of its kind. The use of an embedded customized Lua virtual machine predates the earliest Flame samples by three years.”

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Pierluigi Paganini

(SecurityAffairs – hacking, malware)

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In Lebanon, nearly 1 in 5 people has been displaced by Israeli attacks, leaving the government to manage a modern crisis without modern digital infrastructure.

On the morning of March 11, employees at Stryker offices worldwide switched on their computers and found them blank — login screens replaced by a logo most had never seen. A small, barefoot boy with a slingshot, the symbol of Handala.

The attack on Stryker Corporation — a Fortune 500 medical technology giant that supplies surgical equipment, orthopedic implants, and neurotechnology to hospitals globally — ranks as one of the most operationally destructive cyberattacks ever executed against a U.S. healthcare company.

Stryker reported $25 billion in revenue in 2025 and employs approximately 56,000 people, with its products embedded in hospital supply chains worldwide. What hit it was not ransomware. The attackers came to destroy, not extort.

Stryker confirmed the incident in a Form 8-K filing with the U.S. SEC, describing "a global disruption to the Company's Microsoft environment" and stating it had no indication of ransomware or malware and believed the incident was contained. The company's own filing, however, understated what employees were already reporting on the ground.

Employees in the United States, Ireland, Costa Rica, and Australia reported that managed Windows laptops and mobile devices had been remotely wiped.

"My wife had 3 Stryker managed devices wiped around 3:30 AM EDT. Their Entra login page was defaced with the Handala logo," a Reddit user said.

Another claimed the situation as "bad" and said: "Many colleagues phones have been wiped. Instructed to remove intune, company portal, teams, VPN from personal devices. Personal phone so have lost access to my eSim. Unable to log in to many things due to 2-factor authentication. Have lost all personal data from personal devices that were enrolled and now unable to access emails and teams.

Handala claimed to have wiped more than 200,000 systems, servers, and mobile devices and extracted 50 terabytes of data, forcing Stryker to shut down operations across 79 countries. Stryker in a midnight update said it was still working on complete restoration post the cyberattack.

"We are continuing to resolve the disruption impacting our global network, resulting from the cyber attack.  At this time, there is no indication of malware or ransomware and we believe the situation is contained to our internal Microsoft environment only.  Our products like Mako, Vocera and LIFEPAK35 are fully safe to use.  We have visibility to the orders entered before the event, and they will be shipped as soon as our system communications are restored. Any orders that have come in after the event are being examined. We are working to ensure our electronic ordering system is back up and running as quickly as possible. It is safe to communicate with Stryker employees and sales representatives by email and phone, and within your facility." - Stryker's update on the cyberattack

The mechanism behind the attack points to a calculated abuse of Microsoft Intune — a cloud-based platform enterprises use to manage and push policy updates to all enrolled devices from a single console. A wiper is malware that permanently erases data rather than encrypting it for ransom.

In short, an attacker with admin-level access to Intune effectively is holding a kill switch for every enrolled endpoint in the organization. The Handala branding that appeared on screens before the wipe confirmed that access had been established and held well before the destructive phase began — this was a deliberate, staged operation.

So Who Exactly is Handala?

Handala — also known as Handala Hack Team, Hatef, and Hamsa — first surfaced in December 2023 as a hacktivist operation linked to Iran's Ministry of Intelligence and Security (MOIS), initially targeting Israeli organizations with destructive malware designed to wipe both Windows and Linux devices, explained researchers at AI-powered threat intelligence firm, Cyble.

The group takes its name and visual branding from the iconic Palestinian cartoon character created by Naji al-Ali — a child refugee who never grows up and always turns his back to the viewer.

The hacktivist branding, however, obscures a more serious intelligence attribution. Multiple threat intelligence firms assess Handala as one of several online personas maintained by Void Manticore, a MOIS-affiliated actor optimized for psychological and reputational disruption — breaking into systems, conducting hack-and-leak activity, and timing the publication of stolen material to maximize pressure.

Check Point Research found repeated overlaps between MuddyWater — another MOIS-affiliated group — and Void Manticore, including shared criminal tooling. Handala has used Rhadamanthys, a commercial infostealer sold on dark web forums, pairing it with custom data wipers in phishing lures that impersonated F5 software updates and even Israel's own National Cyber Directorate.

Cyble has observed Handala hackers using Hamsa and Hatef data wipers in its previous campaigns targeted mainly at Israeli entities. [caption id="attachment_110112" align="aligncenter" width="500"] Source: Cyble Research and Intelligence Labs[/caption]

Also read: Iran-linked Threat Group Handala Actively Targets Israel

Void Manticore's attack playbook follows a consistent pattern of Handala too. Initial access through unpatched web servers, VPN gateways, and remote access solutions; lateral movement using living-off-the-land tools like PowerShell and scheduled tasks; and final-stage deployment of destructive wiper families designed to erase file systems and corrupt boot records.

The group's prior targets read like a map of sensitive sectors. Since the start of the Iran-Israel war, Handala has claimed to have wiped Israeli military weather servers, intercepted security feeds in Jerusalem, stolen and wiped data from various companies, doxxed Israeli intelligence officers, and breached an Israeli oil and gas exploration company.

Most recently, threat intelligence reporting documented the group publishing identifying details for 50 senior Israeli Air Force officers — names, IDs, addresses, and phone numbers.

Handala stated the Stryker attack was carried out in retaliation for a U.S. military strike on a school in Minab, Iran, that reportedly killed more than 175 people, most of them children.

[caption id="attachment_110115" align="aligncenter" width="500"] Stryker Cyberattack Claim by Handala (Source: X)[/caption]

Stryker has no direct connection to military operations, though it did secure a $450 million Department of Defense contract in 2025 to supply medical devices to the U.S. military.

That contract likely put a target on Stryker's back.

Recent reporting indicates that MOIS-affiliated groups, including Handala, infiltrated U.S. and Israeli infrastructure weeks before the military operations conducted as part of Operation Epic Fury, suggesting pre-positioned access rather than reactive intrusion. In other words, Handala may have been inside Stryker's environment long before anyone noticed.

Check Point researchers also observed Handala routing operations through Starlink IP ranges to probe externally facing applications for misconfigurations and weak credentials — a deliberate technique to blend reconnaissance traffic into legitimate satellite internet usage and frustrate IP-based blocking.

The hacker collective on Wednesday also claimed hacking another Israeli company Verifone, a leading provider of payment solutions and point-of-sale terminals to countries across the globe. However, a spokesperson for the company told The Cyber Express that all such claims are "fake news" and do not hold any substance. “Verifone closely monitors the security and integrity of its systems worldwide. We have observed recent allegations on March 11, 2026 from threat actors claiming an intrusion into our systems in Israel. Verifone has found no evidence of any incident related to this claim and has no service disruption to our clients," the spokesperson said. Updated on March 13, 2026 1:24 AM ET: The article was updated with a statement from Verifone spokesperson confirming no evidence of intrusion and no authenticity in Handala's claims.

Wired has the story:

Shortly after the first set of explosions, Iranians received bursts of notifications on their phones. They came not from the government advising caution, but from an apparently hacked prayer-timing app called BadeSaba Calendar that has been downloaded more than 5 million times from the Google Play Store.

The messages arrived in quick succession over a period of 30 minutes, starting with the phrase ‘Help has arrived’ at 9:52 am Tehran time, shortly after the first set of explosions. No party has claimed responsibility for the hacks.

It happened so fast that this is most likely a government operation. I can easily envision both the US and Israel having hacked the app previously, and then deciding that this is a good use of that access.