The quarterly report from cyber security and compliance company Proofpoint reveals that overall cloud application attack attempts aimed at global organisations increased by 65% during that time period, with 40% originating in Nigeria.
Proofpoint released its report after examining more than 100,000 cloud application attacks aimed at global organisations between September 2018 and February 2019.
According to Proofpoint, cloud application attacks use intelligence driven brute-force techniques (to crack passwords) and sophisticated phishing methods to lure victims into clicking and revealing their authentication credentials to break into cloud applications including Microsoft Office 365 and Google G Suite.
“As organisations continue to move their mission-critical business functions to the cloud, cyber criminals are taking advantage of legacy protocols that leave individuals vulnerable when using cloud applications,” said Ryan Kalember, executive vice-president of Cyber Security Strategy for Proofpoint.
“These attacks are laser-focused on specific individuals, rather than infrastructure, and continue to grow in sophistication and scope. As a best practice, we recommend that organisations establish a cloud-first approach to security that prioritises protecting employees and educates users to identify and report these advanced techniques and methods.”
Proofpoint reports that it found that the education sector was the most targeted of both brute-force and sophisticated phishing attempts. “This industry, and students especially, are highly vulnerable due to their remote nature,” Proofpoint notes.
Brute-force cloud app attack findings reported by Proofpoint were:
- IMAP-based password spraying attacks are the most popular and extensive technique used to compromise Microsoft Office 365 accounts. These attacks occur when cyber criminals attempt common or recently leaked credentials across many different accounts at the same time.
- Most brute-force attacks originated in China (53%), followed by Brazil (39%), and the US (31%).
- Over 25% of examined Office 365 tenants experienced unauthorised logins and over 60% were actively targeted. Overall, the success ratio in Q1 2019 was 44%
Phishing cloud app attack findings
- Most phishing cloud app attacks originate from Nigeria (63%), followed by South Africa (21%), and the US via VPNs (11%).
- Attackers will often modify email forwarding rules or set email delegations to maintain access. They will also use conspicuous VPN services to bypass conditional access and geolocation-based authentication.