Was Orrick, Herrington & Sutcliffe hit by ransomware?

Orrick, Herrington & Sutcliffe was listed by the SilentRansomGroup 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 SilentRansomGroup ransomware group?

SilentRansomGroup 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 Orrick, Herrington & Sutcliffe breach?

SilentRansomGroup published data attributed to Orrick, Herrington & Sutcliffe. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Orrick, Herrington & Sutcliffe

Claimed by SilentRansomGroup · listed 4 months ago

Age

since listed · data leaked

Status timeline

ListedFeb 23, 2026
Data leakeddate unknown

At a glance

Group: SilentRansomGroup
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Feb 23, 2026

About the victim

AI dossier — public-source company profile

Orrick, Herrington & Sutcliffe is a global law firm founded in 1863 and headquartered in San Francisco, California. The firm advises clients across technology, energy, finance, and other sectors, with offices in major cities across the Americas, Europe, and Asia. It is consistently ranked among the largest and most prominent law firms in the United States.

Industry: Legal Services (Law Firm)
Address: 405 Howard Street, San Francisco, California 94105, United States
Employees: 1000-5000
Founded: 1863

Attack summary

Severity: critical — Orrick is a major law firm handling highly sensitive attorney-client privileged communications, regulated PII for potentially thousands of clients, and confidential legal strategies. Data publication by the group represents confirmed exfiltration of regulated and highly sensitive data at scale, including information belonging to numerous third-party clients across multiple industries.

SilentRansomGroup claims to have exfiltrated data from Orrick, Herrington & Sutcliffe and has published the data. The disclosed status indicates data has been released, though the specific volume and ransom demand were not stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files
Attorney-client privileged communications
Financial records
Personally identifiable information (PII)
Employee records
Litigation documents
Contracts and agreements

What the group claims

Founded in 1963 and headquartered in San Francisco, California, Orrick, Herrington & Sutcliffe is a co…

Source

Indexed 4 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 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 118 public disclosures across our corpus. First observed on a leak site on May 6, 2025; most recent post May 28, 2026. The operation is currently active.

Timeline of this disclosure

February 23, 2026Orrick, Herrington & Sutcliffe listed by SilentRansomGroupon the group's public leak site

Other recent disclosures by SilentRansomGroup

SilentRansomGroup has been linked to 118 public victims on Darkfield. A sample of the most recent:

See the full SilentRansomGroup dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,643 disclosures indexed across all operators we track. Geographically, Orrick, Herrington & Sutcliffe is reported in United States, a country with 7,392 ransomware disclosures in our corpus.

If your organisation is affected

A listing by SilentRansomGroup means Orrick, Herrington & Sutcliffe 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.
Monitor for the data appearing on SilentRansomGroup'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.