Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Endpoint

8/28/2018
05:00 PM
Connect Directly
Twitter
LinkedIn
Google+
RSS
E-Mail
50%
50%

Fileless Attacks Jump 94% in First Half of 2018

While ransomware is still popular, fileless and PowerShell attacks are the threats to watch this year.

A snapshot of the threat landscape from the first half of 2018 shows fileless and PowerShell attacks are the ones to worry about this year, security analysts report.

Endpoint security firm SentinelOne today published its "H1 2018 Enterprise Risk Index Report," which shows fileless-based attacks rose by 94% between January and June. PowerShell attacks spiked from 2.5 attacks per 1,000 endpoints in May 2018 to 5.2 attacks per 1,000 endpoints in June. Ransomware remains popular, ranging from 5.6 to 14.4 attacks per 1,000 endpoints.

The rise of fileless and PowerShell attacks wasn't a major surprise to Aviram Shmueli, SentinelOne's director of product management and leader of this report, who says the two are especially appealing to threat actors who want to fly under their targets' radar.

"Fileless attacks are more sophisticated; they don't leave any trace," he explains, adding that these types of threats are increasingly common in user data. The PowerShell spike "tells us PowerShell [attacks] are here to stay," Shmueli says. Fileless, lateral movement, and document attacks made up 20% of all attacks analyzed in the report.

Fileless and PowerShell attacks are powerful, and attackers can leverage either to do significant damage, he says. It's worth noting the two can overlap: PowerShell lets actors access internal components and can be fileless in nature, enabling them to evade detection.

This report isn't the only one pointing to the popularity of PowerShell among cyberattackers. Earlier this year, McAfee published findings indicating a 267% spike in fileless malware samples spreading PowerShell in the fourth quarter of 2017 alone, compared with the same time period one year prior.

When it comes to which threat is easier to execute, Shmueli says PowerShell might be the more accessible option. "PowerShell is already installed on Windows systems, so attackers can rely on the fact that it's already there without installing anything else," he adds. "This is why we believe attackers choose to use this vector so frequently."

However, the simultaneous increase in fileless attacks indicates threat actors are becoming more sophisticated and turning toward advanced forms of cybercrime. It's becoming less difficult for them to create payloads that won't get caught, complicating defense for targets.

Researchers investigated the drivers behind the recent spikes in fileless and PowerShell attacks but couldn't point to a specific reason driving the increase. This seems to be more of an overall growing trend than a spike related to a particular campaign.

While all three threat vectors are popular, Shmueli says companies should be most cautious about fileless campaigns. The 2018 spike was preceded by an incremental rise in fileless malware that is likely to continue.

"I believe that we will see a growing number of fileless attacks and PowerShell attacks," he adds. As for ransomware, he's not so sure. "The trend is not so constant," he admits. SentinelOne will continue to release these types of reports on a quarterly basis.

Related Content:

 

Black Hat Europe returns to London Dec 3-6 2018  with hands-on technical Trainings, cutting-edge Briefings, Arsenal open-source tool demonstrations, top-tier security solutions and service providers in the Business Hall. Click for information on the conference and to register.

Kelly Sheridan is the Staff Editor at Dark Reading, where she focuses on cybersecurity news and analysis. She is a business technology journalist who previously reported for InformationWeek, where she covered Microsoft, and Insurance & Technology, where she covered financial ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
SOC 2s & Third-Party Assessments: How to Prevent Them from Being Used in a Data Breach Lawsuit
Beth Burgin Waller, Chair, Cybersecurity & Data Privacy Practice , Woods Rogers PLC,  12/5/2019
Deliver a Deadly Counterpunch to Ransomware Attacks: 4 Steps
Mathew Newfield, Chief Information Security Officer at Unisys,  12/10/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: Our Endpoint Protection system is a little outdated... 
Current Issue
Navigating the Deluge of Security Data
In this Tech Digest, Dark Reading shares the experiences of some top security practitioners as they navigate volumes of security data. We examine some examples of how enterprises can cull this data to find the clues they need.
Flash Poll
Rethinking Enterprise Data Defense
Rethinking Enterprise Data Defense
Frustrated with recurring intrusions and breaches, cybersecurity professionals are questioning some of the industrys conventional wisdom. Heres a look at what theyre thinking about.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-19604
PUBLISHED: 2019-12-11
Arbitrary command execution is possible in Git before 2.20.2, 2.21.x before 2.21.1, 2.22.x before 2.22.2, 2.23.x before 2.23.1, and 2.24.x before 2.24.1 because a "git submodule update" operation can run commands found in the .gitmodules file of a malicious repository.
CVE-2019-14861
PUBLISHED: 2019-12-10
All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the (poorly named) dnsserver RPC pipe provides administrative facilities to modify DNS records and zones. Samba, when acting as an AD DC, stores DNS records in LDAP. In AD, the default permiss...
CVE-2019-14870
PUBLISHED: 2019-12-10
All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authent...
CVE-2019-14889
PUBLISHED: 2019-12-10
A flaw was found with the libssh API function ssh_scp_new() in versions before 0.9.3 and before 0.8.8. When the libssh SCP client connects to a server, the scp command, which includes a user-provided path, is executed on the server-side. In case the library is used in a way where users can influence...
CVE-2019-1484
PUBLISHED: 2019-12-10
A remote code execution vulnerability exists when Microsoft Windows OLE fails to properly validate user input, aka 'Windows OLE Remote Code Execution Vulnerability'.