Was Grant Production Testing Services hit by ransomware?

Grant Production Testing Services was listed by the payoutsking ransomware operation (Canada), 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 payoutsking ransomware group?

payoutsking 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 Grant Production Testing Services breach?

payoutsking published data attributed to Grant Production Testing Services. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Grant Production Testing Services

Claimed by Payoutsking · listed 2 months ago

46d

Age

since listed · data leaked

Status timeline

ListedApr 30, 2026
Data leakeddate unknown

At a glance

Group: Payoutsking
Status: Data leaked
Country: Canada
Sector: Business Services
Listed on leak site: Apr 30, 2026

About the victim

AI dossier — public-source company profile

Grant Production Testing Services Ltd. is a Canadian oilfield services company specializing in well testing, flow measurement, and production testing solutions for the upstream oil and gas sector. Founded in 2001 and headquartered in Calgary, Alberta, the company operates multiple regional bases across Western Canada with a fleet of hundreds of testing assets and a management team with over 200 years of combined industry experience.

Industry: Oilfield Services & Well Testing
Address: Suite 1210 Bow Valley Square IV, 250 - 6th Avenue SW, Calgary, Alberta T2P 3H7, Canada
Employees: 51-200
Founded: 2001

Attack summary

Severity: medium — Data published status confirmed, but no proof files, ransom demand, or specific sensitive data categories (PII, financial, regulatory) are documented in the available post excerpt. Operational impact is unclear.

The threat actor claims to have compromised Grant Production Testing Services and published data. No specific details on encryption, exfiltration method, or data categories are stated in the truncated leak post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business records
Operational data

Original description

AI-summarised, not from the leak post

Grant Production Testing Services is an oilfield services company specializing in well testing, flow measurement, and production testing solutions for the oil and gas industry. The company provides temporary and permanent testing equipment, data acquisition, and technical expertise to support operators during exploration and production activities. It operates primarily in Canada, serving clients across the upstream energy sector.

Sources

Victim sitegrantpts.com
Leak posthttp://payoutsgn7cy6uliwevdqspncjpfxpmzgirwl2au65la7rfs5x3qnbqd.onion/rgzHsv-AfSBkC-Vzayoa-1bVwMo-67RhLD

Source

Indexed 2 months 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 payoutsking

Payoutsking is a ransomware group first observed in July 2025 with an apparent primary motivation of financial gain, having been attributed to approximately 100 known victims within a relatively short operational window. Limited public documentation exists from major threat intelligence sources such as CISA, FBI, or Mandiant at this time, which is consistent with the group's recent emergence and potentially limited public disclosure of incidents. Based on available victimology data, the group has concentrated its targeting efforts primarily across the United States, Germany, the United Kingdom, France, and Spain, suggesting a deliberate focus on economically developed Western nations likely selected for their higher ransom-payment capacity. The sectors most frequently targeted include manufacturing, business services, technology, and construction, with a notable proportion of victims falling outside readily classifiable industry categories, which may indicate opportunistic targeting rather than a highly specialized vertical focus. No definitive attribution regarding country of origin, RaaS affiliation, or specific technical tooling has been publicly confirmed by authoritative sources as of this writing, and the group's attack methodology, encryption schemes, and extortion tactics remain insufficiently documented in open-source reporting to characterize with analytical confidence. Given the group's very recent emergence and the relatively high victim count accumulated in a short timeframe, payoutsking warrants continued monitoring, and security researchers and organizations in the identified target sectors should treat this actor as an active and potentially escalating threat pending further technical analysis and public disclosure. The group has been linked to 100 public disclosures across our corpus. First observed on a leak site on July 7, 2025; most recent post May 13, 2026. The operation is currently active.

Timeline of this disclosure

April 30, 2026Grant Production Testing Services listed by payoutskingon the group's public leak site

Other recent disclosures by payoutsking

payoutsking has been linked to 100 public victims on Darkfield. A sample of the most recent:

See the full payoutsking dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,795 disclosures indexed across all operators we track. Geographically, Grant Production Testing Services is reported in Canada, a country with 313 ransomware disclosures in our corpus.

If your organisation is affected

A listing by payoutsking means Grant Production Testing Services 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, CCCS (Canada), as required for your jurisdiction.
Monitor for the data appearing on payoutsking'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.