# Ayres Carr & Sullivan law firm compromised via infostealer

Published: 2026-07-01 · Severity: routine · Sectors: non-profit
Canonical: https://vorant.io/reports/44494400-e3b4-520b-b5a0-77936273f7d8/ayres-carr-sullivan-law-firm-compromised-via-infostealer

> Law firm Ayres Carr & Sullivan exposed via infostealer infection affecting 761 employees and 3.9M third-party credentials.

Ayres Carr & Sullivan, P.C., a law firm, has been identified as a victim of compromise through infostealer malware infection. The breach exposed credentials for 761 company employees and 3,925,135 third-party user accounts, indicating widespread credential harvesting. Additionally, 323 third-party employee credentials were compromised. The firm's external attack surface includes 190 DNS records. This compromise demonstrates the ransomware.live tracking mechanism where infostealer infections often serve as a precursor to ransomware deployment, as defenders commonly observe infostealers enabling follow-on access for encryption attacks. The exposure of bulk third-party credentials suggests the attackers obtained access to credential repositories or password managers in use at the organization.

## Mentioned in this report

- Malware: Infostealer

## Detection guidance (public sample)

### Non-Browser Process Command Line Referencing Browser Credential Stores

ATT&CK: T1555.003

Detects a process command line that references browser profile directories together with credential database files such as Login Data, logins.json or key4.db, a pattern used by infostealers and credential-dumping tools. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.

```yaml
title: Non-Browser Process Command Line Referencing Browser Credential Stores
description: Detects processes (cmd, powershell, esentutl, sqlite tools, unknown binaries)
  whose command line points at browser profile directories and credential database
  files (Login Data, logins.json, key4.db, signons.sqlite). Infostealers and post-exploitation
  tools copy or query these files to harvest saved passwords. Generalises on the profile
  path plus credential-file pattern, not on any specific malware name.
tags:
- attack.credential-access
- attack.t1555.003
logsource:
  category: process_creation
  product: windows
detection:
  selection_profile:
    CommandLine|contains:
    - \Google\Chrome\User Data
    - \Microsoft\Edge\User Data
    - \BraveSoftware\
    - \Mozilla\Firefox\Profiles
    - \Opera Software\
    - \Vivaldi\User Data
  selection_credfile:
    CommandLine|contains:
    - Login Data
    - logins.json
    - key4.db
    - signons.sqlite
  filter_browsers:
    Image|endswith:
    - \chrome.exe
    - \msedge.exe
    - \firefox.exe
    - \brave.exe
    - \opera.exe
    - \vivaldi.exe
  condition: selection_profile and selection_credfile and not filter_browsers
falsepositives:
- Endpoint backup or profile migration tools copying browser profiles
- Forensic or IT support staff manually collecting browser profile data
level: high
id: 142c4723-7148-578d-87cf-c17b45f63884
status: experimental
author: Vorant
references:
- https://www.ransomware.live/id/QXlyZXMgQ2FyciAmIFN1bGxpdmFuLCBQLkMuQHRoZWdlbnRsZW1lbg==
```

Behavioural rules are generated from public reporting — validate in your environment before deploying.

1 more detection for this report is in the app: the rules that match its indicators, the Sigma rules already converted to Splunk SPL, to Elastic where their fields map onto Elastic's integrations and to Microsoft Defender XDR KQL wherever Defender records the activity, and the YARA and Suricata. A new account gets three days of them free.

Source reporting: https://www.ransomware.live/id/QXlyZXMgQ2FyciAmIFN1bGxpdmFuLCBQLkMuQHRoZWdlbnRsZW1lbg==

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