Disclosure context

About Avoslocker

**Overview**: AvosLocker is a financially motivated ransomware group that emerged in June 2021, operating as both a Ransomware-as-a-Service (RaaS) platform and conducting direct attacks against organizations worldwide. The group has demonstrated sophisticated capabilities and has targeted over 70 victims across multiple critical sectors. **Origin & Affiliation**: While the exact country of origin remains unclear, AvosLocker operates as a RaaS model, recruiting affiliates to conduct attacks using their ransomware payload and infrastructure. The group has shown no clear ties to state-sponsored activities, appearing to be purely profit-driven cybercriminals. **Attack Methodology**: AvosLocker typically gains initial access through compromised Remote Desktop Protocol (RDP) credentials, VPN vulnerabilities, and phishing campaigns, subsequently deploying tools like Cobalt Strike for lateral movement and persistence. The group employs double extortion tactics, stealing sensitive data before encrypting systems and threatening to publish the information on their leak site if ransom demands are not met. Their ransomware uses strong encryption algorithms and includes capabilities to terminate security processes and delete shadow copies to prevent recovery. **Notable Campaigns**: The group has particularly targeted critical infrastructure sectors including education, manufacturing, finance, healthcare, and transportation, with significant attacks reported against organizations in the United States, Germany, Singapore, Canada, and France. CISA and FBI have issued joint advisories warning about AvosLocker's targeting of critical infrastructure, highlighting the group's impact on essential services. **Current Status**: As of recent threat intelligence reporting, AvosLocker remains active, continuing to recruit affiliates and conduct ransomware operations against organizations globally. The group has been linked to 70 public disclosures across our corpus. First observed on a leak site on June 13, 2021; most recent post February 11, 2023. The operation is currently inactive.

Also tracked as: Avos.

Timeline of this disclosure

February 11, 2023Ultralife Corporation listed by Avoslockeron the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, Ultralife Corporation 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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Ultralife Corporation

Claimed by Avoslocker · listed 3 years ago

39m

Age

since listed · data leaked

Status timeline

Listed
Feb 11, 2023
Data leaked

At a glance

Group: Avoslocker
Status: Data leaked
Country: United States
Sector: Technology
Listed on leak site: Feb 11, 2023

About the victim

AI dossier — public-source company profile

Ultralife Corporation (NASDAQ: ULBI) is a publicly traded U.S. company headquartered in Newark, New York, that designs and manufactures batteries, communications systems, and related products primarily for defense, government, and commercial markets. The company serves military and industrial customers globally with power and communications solutions. It operates manufacturing facilities in the United States and internationally.

Industry: Defense & Industrial Battery / Power Solutions Manufacturing
Address: 2000 Technology Pkwy, Newark, NY 14513, United States
Employees: 501-1000
Founded: 1990

Attack summary

Severity: critical — Ultralife is a publicly traded defense contractor; the claimed exfiltration spans regulated categories including PII (HR/client data), proprietary defense-related design and manufacturing IP, and financial records. Data is stated as published, making this a confirmed multi-category sensitive data breach affecting a defense-sector company.

AvosLocker claims to have exfiltrated a broad range of sensitive data from Ultralife Corporation, including client information, design and manufacturing files, financial and accounting records, and HR data, with the disclosure status indicating the data has been published.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client information
Design files
Manufacturing data
Financial records
Accounting records
HR data

What the group claims

Publicly traded stock as ULBI. Client information, design, manufacture, financial, accounting, HR and more. Address: 2000 Technology Pkwy, Newark, NY 14513, United States Phone: +1 315 332 7100

Sources

Victim siteultralifecorp.com

Source

Indexed 3 years 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.