Was Arch-con hit by ransomware?

Arch-con was listed by the warlock 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 warlock ransomware group?

warlock 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 Arch-con breach?

warlock published data attributed to Arch-con. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Arch-Con Corporation

listed as Arch-con · Claimed by Warlock · listed 1 year ago

13m

Age

since listed · data leaked

Status timeline

ListedJun 11, 2025
Data leakeddate unknown

At a glance

Group: Warlock
Status: Data leaked
Country: United States
Listed on leak site: Jun 11, 2025

About the victim

AI dossier — public-source company profile

Arch-Con Corporation is a commercial construction company based in Houston, Texas that provides construction management services across office, retail, healthcare, hospitality, and industrial sectors. They offer guaranteed maximum price contracts to clients seeking budget certainty.

Industry: Commercial Construction Management
Address: Houston, Texas, United States

Attack summary

Severity: low — Data has been published but no specific data types are enumerated, no proof files are advertised, and no operational impact is claimed. The post appears to be an announcement with minimal substantive evidence.

The ransomware operator claims to have breached Arch-Con Corporation and published data, though specific details on what data was exfiltrated or whether systems were encrypted are not stated in the available post excerpt.

low

Original description

AI-summarised, not from the leak post

Arch-Con Corporation is a commercial construction company based in Houston, Texas. They work across various market sectors such as office, retail, healthcare, hospitality, industrial, and many more. Arch-Con offers construction management services at the risk of the constructor, providing guaranteed maximum prices to establish budget certainty. Their goal is to exceed client expectations using their experience, talents, and resources.

Source

Indexed 1 year 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 warlock

Warlock is an emerging ransomware group that first appeared in June 2025, primarily motivated by financial gain through extortion operations targeting organizations across multiple sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their targeting pattern spans both Western nations and Russia, suggesting possible opportunistic rather than geopolitically-motivated operations. Based on available victim data, Warlock has demonstrated capability to compromise organizations across diverse sectors including technology, financial services, telecommunications, and healthcare, with their attack methodology and technical capabilities requiring further analysis by security researchers to establish definitive patterns regarding initial access vectors, encryption methods, or data exfiltration tactics. While the group has accumulated 78 documented victims across the United States, Japan, Russia, Great Britain, and Turkey within their initial months of operation, insufficient public reporting from CISA, FBI, or major security firms exists to detail specific notable campaigns, ransom demands, or high-profile incidents. Given the group's recent emergence in mid-2025, their current operational status and potential evolution remain under observation by the cybersecurity community. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on June 11, 2025; most recent post November 6, 2025. The operation is currently inactive.

Timeline of this disclosure

June 11, 2025Arch-con listed by warlockon the group's public leak site

Other recent disclosures by warlock

warlock has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full warlock dossier →

Sector and geography

Geographically, Arch-con is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by warlock means Arch-con 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 warlock'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.