Disclosure context

About SilentRansomGroup

Based on the limited available information, SilentRansomGroup is a relatively new ransomware operation that first emerged in May 2025, appearing to be financially motivated given their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to their recent emergence, though their diverse geographic targeting including the United States, Germany, Canada, and Russia suggests either a sophisticated operation or potential ransomware-as-a-service model. Their attack methodology and specific technical capabilities have not been extensively documented by major security researchers, though their targeting of business services, financial services, hospitality, and manufacturing sectors indicates they likely focus on organizations with both valuable data and ability to pay significant ransoms. With 93 known victims across multiple countries and sectors in a relatively short timeframe since May 2025, SilentRansomGroup has demonstrated notable activity levels, though specific high-profile campaigns or ransom amounts have not been publicly disclosed by CISA, FBI, or major threat intelligence firms. The group appears to remain active as of current reporting periods, though comprehensive technical analysis and attribution efforts by established security researchers are still developing given their recent emergence in the threat landscape. The group has been linked to 117 public disclosures across our corpus. First observed on a leak site on May 6, 2025; most recent post May 19, 2026. The operation is currently active.

Timeline of this disclosure

April 1, 2026Plunkett Cooney listed by SilentRansomGroupon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Plunkett Cooney is reported in US, a country with 2,713 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Plunkett Cooney

Claimed by SilentRansomGroup · listed 2 months ago

49d

Age

since listed · data leaked

Status timeline

Listed
Apr 1, 2026
Data leaked

At a glance

Group: SilentRansomGroup
Status: Data leaked
Country: US
Sector: Business Services
Listed on leak site: Apr 1, 2026

About the victim

AI dossier — public-source company profile

Plunkett Cooney is a law firm founded in 1913 and headquartered in Bloomfield Hills, Michigan. The firm provides a range of legal services and is one of the longer-established law practices in the Midwest United States.

Industry: Legal Services
Address: Bloomfield Hills, Michigan, US
Employees: 201-500
Founded: 1913

Attack summary

Severity: critical — Plunkett Cooney is a law firm, meaning exfiltrated data almost certainly includes privileged attorney-client communications, sensitive litigation materials, and PII for both clients and staff. Data has been published, confirming exfiltration of regulated and highly sensitive information at scale.

SilentRansomGroup claims to have attacked Plunkett Cooney and has published data (disclosed status: data_published), indicating exfiltration of firm data; the specific volume and nature of stolen files are not detailed in the truncated post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Legal case files
Client records
Attorney-client communications
Financial records
Employee personally identifiable information

What the group claims

Founded in 1913 and headquartered in Bloomfield Hills, Michigan. Plunkett Cooney is a law firm with of…

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.