Was StMicroelectronics hit by ransomware?

StMicroelectronics was listed by the thegentlemen ransomware operation (Italy), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the thegentlemen ransomware group?

thegentlemen is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the StMicroelectronics breach?

thegentlemen published data attributed to StMicroelectronics. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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StMicroelectronics

Claimed by Thegentlemen · listed 4 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedSep 26, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Italy
Sector: Technology
Listed on leak site: Sep 26, 2026

About the victim

AI dossier — public-source company profile

STMicroelectronics (ST) is one of the world's largest semiconductor manufacturers and Europe's biggest chipmaker, headquartered in Geneva, Switzerland. The company designs, produces, and sells microcontrollers, sensors, analog/power chips, silicon carbide devices, and data center/satellite chips. It serves over 200,000 customers globally including Apple, Tesla, Bosch, Samsung, and SpaceX, operates 14 manufacturing plants across Europe and Asia, and invests approximately 17% of its $13.1 billion annual revenue in R&D.

Industry: Semiconductor Manufacturing & Design
Address: Geneva, Switzerland
Employees: 49000
Founded: 1987

Attack summary

Severity: low — Post is a listing/announcement with company background information only. No proof files, screenshots, or evidence of data exfiltration or encryption is mentioned. No operational impact or specific data compromise is claimed.

The leak post names STMicroelectronics and provides company information via ZoomInfo, but contains no explicit claim of what data was exfiltrated, encrypted, or accessed. No attack methodology or data compromise is stated in the available post excerpt.

low

What the group claims

st.com zoominfo.com/c/stmicroelectronics/114508234 Revenue $13.1 Billion STMicroelectronics (ST) is one of the world's largest semiconductor companies and Europe's biggest chipmaker, headquartered in Geneva, Switzerland. Formed in 1987 through the merger of Italian and French state-owned chip companies, it is a fully integrated manufacturer — it designs, produces, and sells its own chips. Its core products are microcontrollers (the flagship STM32 family), sensors, analog and power chips, silicon carbide devices for electric vehicles, and chips for data centers and satellites. The company serves over 200,000 customers worldwide — including Apple, Tesla, Bosch, Samsung, and SpaceX — supplying components for cars, smartphones, industrial equipment, and data centers. It operates 14 manufacturing plants across Europe and Asia, employs about 49,000 people, and invests roughly 17% of its revenue in R&D.

Sources

Victim sitest.com
Leak posthttp://tezwsse5czllksjb7cwp65rvnk4oobmzti2znn42i43bjdfd2prqqkad.onion/#StMicroelectronics

Source

Indexed 4 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 889 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post September 26, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

September 26, 2026StMicroelectronics listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 889 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,579 disclosures indexed across all operators we track. Geographically, StMicroelectronics is reported in Italy, a country with 203 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means StMicroelectronics appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CSIRT Italia (Italy), as required for your jurisdiction.
Monitor for the data appearing on thegentlemen's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.