Full Report
Verizon’s 2025 Data Breach Investigations Report noted a 37% increase in ransomware attacks and a 34% increase in exploited vulnerabilities. The post Verizon discovers spike in ransomware and exploited vulnerabilities appeared first on CyberScoop.
Analysis Summary
# Incident Report: Escalating Ransomware Activity Driven by Exploited Vulnerabilities
## Executive Summary
Verizon's 2025 Data Breach Investigations Report revealed a significant escalation in cybersecurity threats, marked by a 37% year-over-year surge in ransomware incidents across analyzed data breaches. This increase was strongly correlated with a 34% rise in the exploitation of vulnerabilities for initial access, particularly targeting network edge devices and VPNs. While the rate of ransom payment decreased, small to medium-sized businesses (SMBs) were disproportionately affected by ransomware attacks.
## Incident Details
- **Discovery Date:** Findings released on Wednesday, April 23, 2025 (publication date of the report summarizing 2024 incidents).
- **Incident Date:** Incidents cover the period between November 1, 2023, and October 31, 2024.
- **Affected Organization:** Not a single incident; analysis of 12,195 data breaches reviewed by Verizon.
- **Sector:** Multiple sectors analyzed within Verizon's scope.
- **Geography:** Global scope, based on Verizon's international data breach review.
## Timeline of Events
### Initial Access
- **Date/Time:** Throughout the reporting period (Nov 1, 2023 – Oct 31, 2024).
- **Vector:** Exploited vulnerabilities (representing 20% of all initial access vectors) and credential abuse.
- **Details:** Exploitation of vulnerabilities, especially on **edge devices and VPNs**, increased almost eightfold (from 3% to 22% of exploited vulnerability actions). Attackers targeted flaws in security appliances from vendors like Ivanti, Palo Alto Networks, Cisco, and Fortinet.
### Lateral Movement
- *Details not explicitly detailed beyond the context of successful exploitation leading to breaches, often associated with ransomware operators.*
### Data Exfiltration/Impact
- **What was stolen or damaged:** Ransomware was present in 44% of all analyzed data breaches (up from 32% the prior year). SMBs experienced ransomware in 88% of their breaches.
### Detection & Response
- **How it was discovered:** Analysis based on 12,195 data breaches, utilizing data collected from data leak sites, with high confidence regarding ransomware claims.
- **Response actions taken:** Organizations took a median of 32 days to patch or fully remediate exploited edge device vulnerabilities. 64% of victim organizations ultimately chose *not* to pay the ransom.
## Attack Methodology
- **Initial Access:** Exploitation of Vulnerabilities (34% YoY increase); Credential Abuse (still highly prevalent).
- **Persistence:** *Not specified.*
- **Privilege Escalation:** *Not specified.*
- **Defense Evasion:** *Not specified, though successful exploitation implies evasion of initial perimeter defenses.*
- **Credential Access:** Implied as a common method alongside vulnerability exploitation.
- **Discovery:** *Not specified.*
- **Lateral Movement:** Implied precursor to ransomware deployment.
- **Collection:** *Not specified.*
- **Exfiltration:** Ransomware deployment serves as the primary impact mechanism, although data exfiltration is common in modern ransomware tactics.
- **Impact:** Encryption/disruption via ransomware (37% increase in frequency).
## Impact Assessment
- **Financial:** Median ransom paid decreased from $150,000 (2023) to **$115,000 (2024)**.
- **Data Breach:** Ransomware present in 44% of all breaches reviewed.
- **Operational:** Significant operational impact stemming from ransomware deployment, though the report focuses on frequency, not specific downtime metrics.
- **Reputational:** Inferred, as 64% of victims refused payment, likely due to resilience or data already being compromised.
## Indicators of Compromise
- **Network indicators - defanged:** Exploited vulnerabilities likely leverage specific CVEs associated with Ivanti, Palo Alto Networks, Cisco, and Fortinet edge/VPN devices.
- **File indicators:** *Not specified.*
- **Behavioral indicators:** Increased use of ransomware, and extremely slow patching times for critical edge device vulnerabilities (median 32 days).
## Response Actions
- **Containment Measures:** *Not specified in detail, typical response to an established breach.*
- **Eradication Steps:** Patching and remediation efforts were slow, taking a median of 32 days for edge devices.
- **Recovery Actions:** Decision not to pay ransom in the majority of cases (64%).
## Lessons Learned
- Exploited vulnerabilities are a primary and rapidly growing vector, directly fueling ransomware expansion.
- Network edge devices (VPNs, firewalls) remain profoundly vulnerable targets, with remediation lagging significantly behind the speed of exploitation.
- Ransomware is increasingly targeting Small-to-Medium Businesses (SMBs) successfully (88% of SMB breaches involved ransomware).
- A growing number of victims are refusing to pay ransoms, suggesting improved organizational resilience or the ineffectiveness/availability of decryptors.
## Recommendations
- Prioritize the immediate patching and remediation of known vulnerabilities, especially on network edge devices and VPNs, aiming for a median cleanup time significantly less than 32 days.
- Implement enhanced detection and monitoring specifically tailored for post-exploitation activity originating from perimeter devices.
- Enhance security postures for SMBs concerning backup strategies and ransomware defense, as they are disproportionately targeted.