Disclosure context

About Interlock

Interlock is a recently emerged ransomware group that began operations in October 2024, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's country of origin and potential affiliations remain unclear given their recent emergence, with insufficient public documentation to determine whether they operate as an independent entity or under a Ransomware-as-a-Service model. Limited public information exists regarding their specific attack methodologies, initial access vectors, or encryption techniques, as major cybersecurity firms and law enforcement agencies have not yet published comprehensive technical analyses of their operations. Since beginning operations, Interlock has reportedly compromised approximately 100 victims, with their targeting primarily focused on organizations in English-speaking countries including the United States, Canada, United Kingdom, and Australia, as well as Italy, while demonstrating a preference for attacking education, manufacturing, healthcare, and public sector entities. The group remains active as of late 2024, though comprehensive threat intelligence profiles from established security research organizations have not yet been published due to the group's recent emergence in the threat landscape. The group has been linked to 109 public disclosures across our corpus. First observed on a leak site on October 13, 2024; most recent post May 11, 2026. The operation is currently active.

Timeline of this disclosure

December 15, 2025Print-O-Tape listed by Interlockon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Print-O-Tape is reported in United States, a country with 7,392 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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Print-O-Tape

Claimed by Interlock · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 15, 2025
Data leaked

At a glance

Group: Interlock
Status: Data leaked
Country: United States
Sector: Manufacturing
Listed on leak site: Dec 15, 2025

About the victim

AI dossier — public-source company profile

Print-O-Tape, Inc. is a Mundelein, Illinois-based manufacturer of pressure sensitive labels and materials, in operation for nearly 70 years. The company produces custom labels, stock labels, RFID labels, baggage tags, boarding passes, and roll stock, serving global clients across transportation, warehousing, food and beverage, consumer goods, and industrial markets. It holds a US patent for a unique tandem coating process and maintains long-term relationships with high-profile end users, resellers, and OEMs.

Industry: Pressure Sensitive Labels & Self-Adhesive Materials Manufacturing
Address: 755 Tower Road, Mundelein, IL 60060, United States

Attack summary

Severity: high — Data has been confirmed published by the threat actor, indicating successful exfiltration of business data from a manufacturer with global clients and long-term OEM relationships. While no specific regulated PII at scale (e.g. medical or government) is evidenced, the confirmed data publication and potential exposure of proprietary business, customer, and financial records warrants a high severity rating.

The Interlock ransomware group claims to have attacked Print-O-Tape, Inc. and has published data associated with the company. The disclosed status indicates data has been published, though the specific volume of exfiltrated data and whether encryption occurred on-site were not detailed in the leak post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Business client/customer records
OEM and reseller relationship data
Internal company files
Potentially financial or accounts receivable records

What the group claims

Print-O-Tape, Inc. is a manufacturer specializing in self-adhesive labels, offering a wide range of products including custom labels, stock labels, RFID labels, and roll materials. The company has established strong relationships with well-known end users, resellers, and OEMs, providing labeling solutions. Their commitment to innovation and technology allows them to remain an industry leader, serving markets such as transportation, warehousing, food and beverage, and consumer goods. Print-O-Tape, Inc. manufactures and supplies self-adhesive labels to customers worldwides.

Sources

Victim siteprintotape.com
Leak posthttp://gobj3ph5sj332iithgescrsejiszhaey5l4ffwnou4nwanbcf37phdqd.onion/index.php?p=

Source

Indexed 5 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.