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

December 26, 2022CPA Mutual Insurance Company listed by Avoslockeron the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Finance sector, which has 92 disclosures indexed across all operators we track. Geographically, CPA Mutual Insurance Company 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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CPA Mutual Insurance Company

Claimed by Avoslocker · listed 3 years ago

41m

Age

since listed · data leaked

Status timeline

Listed
Dec 26, 2022
Data leaked

At a glance

Group: Avoslocker
Status: Data leaked
Country: United States
Sector: Finance
Listed on leak site: Dec 26, 2022

About the victim

AI dossier — public-source company profile

CPA Mutual Insurance Company provides professional liability (errors & omissions) insurance solutions specifically tailored to accounting firms and CPAs in the United States. Its mission is to address the professional liability needs of accountants while helping member firms manage and prevent risks. The company positions itself as a member-focused insurer striving to exceed expectations in risk management.

Industry: Professional Liability Insurance for Accountants

Attack summary

Severity: high — Data has been published (disclosed status: data_published) and the sample includes actual insurance policy documents, which likely contain sensitive financial and business PII belonging to CPA firms and their clients. Exposure of cyber insurance policy details is particularly sensitive as it reveals coverage limits and security posture of insured firms.

AvosLocker claims to have exfiltrated data from CPA Mutual Insurance Company, with the leak post indicating that at least one cyber insurance policy document has been published as a sample proof of the breach.

high

Data the group says was taken

AI dossier — extracted from the leak post

Cyber insurance policy documents
Professional liability policy records
Client/member firm information

The group's post references roughly 1 proof file.

What the group claims

Cyber Insurance policy leaked in sample. At CPA Mutual, our mission is to provide a quality and lasting solution to the professional liability needs of accountants. We bring added value to our member firms by continually striving to exceed their expectations and helping them manage and prevent risks.

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.