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Delek US

Claimed by HELIX · listed 4 hours ago

3.26 GB
Data size
3982 files records
Today
Age
since listed · listed for ransom

Status timeline

  1. ListedAug 20, 2026

Current state: Listed for ransom

At a glance

Group
HELIX
Status
Listed for ransom
Country
United States
Sector
Oil & Gas Refining
Listed on leak site
Aug 20, 2026
Data size
3.26 GB
Records
3982 files

About the victim

AI dossier — public-source company profile

Delek US is a publicly traded petroleum refining and logistics company operating in the United States. The company owns and operates refineries and distributes petroleum products.

Industry
Oil & Gas Refining

Attack summary

Severity: high — Confirmed exfiltration of corporate data (SharePoint libraries) from a major oil & gas refiner; staged multi-tier disclosure indicates significant data volume and sensitivity; operational scale of victim increases impact potential.

HELIX claims to have exfiltrated data from Delek US, staged across four disclosure tiers on their leak site. SharePoint libraries were accessed and are being released incrementally over a timed countdown, with T1 unlocking after 12 hours and subsequent tiers following at 24-hour intervals.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • SharePoint libraries
  • Corporate documents

What the group claims

T1 unlocks in 12 hours, then 24 hours per remaining tier.

The leak post

captured from the group's site
Published feeds. Opening a feed leaves this page for the board.
[ Delek US is live. T1 unlocks in 12 hours, then 24 hours per remaining tier. · Operator · Board live ](http://helixr2sncrd3ndsz5oho6mzqw3x5u7mvox5zcsngc5wm7v4l5k7oryd.onion/p/169f107db2a3ef002d03c665c3adf1f71560d1c5463ef35f720a9d5062f80d4b) [ Kennedy Jenks is live. T1–T3 are unlocked. T4 in 24 hours. · Operator · Board live ](http://helixr2sncrd3ndsz5oho6mzqw3x5u7mvox5zcsngc5wm7v4l5k7oryd.onion/p/1ba8b0df41a617631d09ae43a2bb4a5748b5b3f2b1cd007251bb3598a5ddcf44) [ Westland reached out, got the full demand, then stalled with no serious number. Contacting us and dragging process is not negotiation. · Operator · Board live ](http://helixr2sncrd3ndsz5oho6mzqw3x5u7mvox5zcsngc5wm7v4l5k7oryd.onion/p/380506d310d5417b836512938f95a302a7fb021fbe54b9f392da079aaf9ade1e) [ Morguard reached out, took extensions, then ignored the negotiation with no real offer. Contacting us and stalling is not a strategy. Deadlines stand. Silence after outreach gets a private board and a countdown then publication. · Operator · Board live ](http://helixr2sncrd3ndsz5oho6mzqw3x5u7mvox5zcsngc5wm7v4l5k7oryd.onion/p/c986586defd4792920f696b167ebdef91eca624…

Screenshot of the leak post

Leak screenshot for Delek US

Sources

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 HELIX

HELIX is an active ransomware group with 10 confirmed victims as of August 2026, operating one onion leak site. The small victim tally points to either a recent entry or selective targeting. The group has been linked to 20 public disclosures across our corpus. The operation is currently active.

Timeline of this disclosure

  • August 20, 2026Delek US listed by HELIXon the group's public leak site
Data size
3.26 GB
Records
3982 files

Other recent disclosures by HELIX

HELIX has been linked to 20 public victims on Darkfield. A sample of the most recent:

See the full HELIX dossier →

Sector and geography

This disclosure adds to ransomware activity in the Oil & Gas Refining sector. Geographically, Delek US is reported in United States, a country with 3,162 ransomware disclosures in our corpus.

If your organisation is affected

A listing by HELIX means Delek US appeared on a ransomware extortion site and is being pressured to pay before any publication. 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 HELIX'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.