Was Military Sealift Command hit by ransomware?

Military Sealift Command was listed by the thegentlemen ransomware operation (United States), 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 Military Sealift Command breach?

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

Ransomware victim disclosure

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Military Sealift Command

Claimed by Thegentlemen · listed 12 days ago

11d

Age

since listed · data leaked

Status timeline

ListedJul 17, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: United States
Sector: Transportation/Logistics
Listed on leak site: Jul 17, 2026

About the victim

AI dossier — public-source company profile

Military Sealift Command (MSC) is a U.S. Department of Defense organization that operates and maintains a fleet of ships to provide ocean transportation of military cargo, equipment, and personnel. The organization employs civilian mariners and military personnel across deck, engineering, culinary, logistics, and medical departments.

Industry: Government / Defence / Maritime Transportation

Attack summary

Severity: critical — Exfiltration of ITAR-controlled technical data (export-controlled defence information), classified or sensitive military cargo manifests including weapons systems shipments, vessel blueprints, and personal data from a U.S. defence organisation represents critical national security and operational risk.

The group claims to have exfiltrated classified and sensitive documents including ITAR documentation, personal data, cargo manifests with ESSM (Evolved Sea Sparrow Missile) shipment details, vessel blueprints, and both disclosed and undisclosed internal information. The group states it attempted to contact named individuals (Jennifer Miller, Todd Phillips, Dain Costlow) with proof of the breach, but claims these individuals dismissed the matter.

critical

Data the group says was taken

AI dossier — extracted from the leak post

ITAR documentation
Personal data (employee records)
Cargo manifests
ESSM shipment records
Vessel blueprints
Undisclosed internal documents

What the group claims

***.com zoominfo.com/c/military-sealift-command/149045906 We attempted to contact the managers regarding the leaked documents (ITAR documentation, personal data, cargo manifests—including ESSM shipments—vessel blueprints, and both disclosed and undisclosed information)/ We managed to reach only Jennifer Miller , Todd Phillips and Dain Costlow However, these individuals dismissed the entire matter as a joke, ignoring all warnings about leaks and the importance of internal documents, and refused to provide any contact details for anyone authorized to handle such issues or to pass the information on to management, despite the availability of conclusive evidence. If you do not get in touch in the near future, the data will be published.

Sources

Victim sitesealiftcommand.com

Source

Indexed 12 days 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 655 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post July 28, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

July 17, 2026Military Sealift Command listed by thegentlemenon the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 655 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 Transportation/Logistics sector, which has 1,081 disclosures indexed across all operators we track. Geographically, Military Sealift Command is reported in United States, a country with 3,138 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Military Sealift Command 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, CISA (United States), 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.