Cloud users suffer account takeovers

Vectra AI has released its global survey of 1,112 security professionals working in mid to large sized organizations using Microsoft Office 365. The results confirm that the COVID-19 pandemic has accelerated cloud migration and digital transformation amongst 88% of companies and that 71% of Microsoft Office 365 deployments have suffered an account takeover of a legitimate user’s account, not once, but on average seven times in the last year. 

The fact that 3 in 4 companies have experienced malicious account takeover attacks highlights the need to track and secure identities as they move from on prem to the cloud.  Just one in three security professionals believe they could identify and stop an account takeover attack immediately, the majority expect to take days or even weeks to intercept such a breach. 

These challenges faced by defenders mirror the findings of the last Spotlight Report, which tracked the behaviour of four million Microsoft Office 365 customers over 90 days and discovered that 96% of networks exhibited suspicious lateral movement behaviour and that account takeovers were at the top of the list of methods used by attackers to move laterally between the cloud and network. 

Tim Wade, Technical Director of the CTO team at Vectra, comments, “We’re regularly seeing identity-based attacks being used to circumnavigate traditional perimeter defences like multi-factor authentication (MFA). Account takeovers are replacing phishing as the most common attack vector and MFA defenses are speed bumps not forcefields.  Organizations need to take this seriously and plan to detect and contain account compromise before a material disruption of their business occurs – malicious access, even for a short period of time, can do a tremendous amount of damage.”

However, the survey also reveals a high level of confidence amongst security teams in the effectiveness of their own company’s security measures: nearly 4 in 5 claim to have good or very good visibility into attacks that bypass perimeter defences like firewalls. Yet there is an interesting contrast of opinions between management level respondents and practitioners such as Security Operations Center (SOC) analysts, with managers exhibiting much greater confidence in their defensive abilities. Overall, the top security concerns cited by Microsoft Office365 customers are the risk of compromise of data held in the cloud, the risk of account take-over and the ability of hackers to use living-of-the-land attacks to hide their tracks.   

Kevin Orritt, ICT Security Manager at Greater Manchester Mental Health NHS Foundation Trust commented: “It’s interesting to see the differences between managers and practitioners’ perception of their risk exposure.  Senior managers invest a fortune in technology and think they’ve ticked the security box.  While the investment is certainly welcome and helps us reduce risk, in reality it isn’t that simple.  We still need the people to be able to interpret and action the alerts and make sure that we’re actually measuring the right things.  We’re all aware of the problem of skills shortage within the security industry.  Attack vectors are constantly changing and security teams need to be sure they’re able to adapt to prevent, defend and mitigate an increasing array of attack vectors with security teams that are being stretched to the limits.” 

He continued: “Within the healthcare sector we’ve seen a huge acceleration of the journey towards digital transformation. I’d say our own Foundation Trust has speeded up its move to the cloud by at least two years.  The introduction of virtual consultations using Microsoft Teams has been a massive boon during the pandemic and it’s here to stay even after lockdown ends.  The speed with which the healthcare industry was forced to make the move to the cloud at the beginning of the pandemic and the increased demand for our services, means that inevitably we’ve had to deal with new security vulnerabilities along the way.  Attackers have also moved their focus to the cloud to gain a foothold into the organisation and then move laterally into the network.  Like many healthcare organisations we’ve seen a sharp rise in spear phishing attacks during the last year, so it’s vital that security professionals don’t get complacent and remain on high alert, as remote working is definitely here to stay and so too are the hackers.”

Tim Wade, Technical Director of the CTO team at Vectra, comments: “The tendency for managers to be significantly more confident that those working at the coalface suggests that there is a level of self-delusion going on here. Perhaps it’s because the metrics that are being shared with senior management often focus more on the volume of attacks stopped rather than the severity of the attack or the number of investigations that reach a firm conclusion.  Whatever the reason it’s important not to be complacent and remain constantly vigilant of new types of attacks.”

The findings also reveal that a majority (58%) of security professionals say the gap between attackers and defenders is widening. The shift to cloud, and adoption of remote working has heightened the threat of cyber-attacks, with four in five security professionals saying that cyber security risks have increased in the last twelve months.   

Other key findings from the report include:

·       IoT/Connected devices and identity-based attacks are the top two security concerns for 2021

·       58% of businesses plan to invest more money in people and technology and 52% will invest in AI and automation in 2021

·       The biggest frustration with existing security solutions it the amount of time needed to manage them

·       The best thing about their roles as security professionals is the satisfaction of stopping attacks and protecting their companies, whilst frustration at end user’s lack of understanding of cyber security remains the biggest frustration.