Security Blogs Focused on Threat Intelligence
Data Analysis of CVE-2017-5638 Exploit Attempts
A major vulnerability, the Apache Struts 2 0-Day vulnerability (CVE-2017-5638), was recently discovered on March 6, 2017. Here at NTT Security, we analyze these types of vulnerabilities, setup detection capabilities and analyze any exploit attempts by threat actors as detected via the NTT Security Global Managed Security Services Platform.
This blog takes a further look, via data analysis, into the active exploit attempts of the Apache Struts 2 0-Day vulnerability as seen in the NTT Security Global Managed Security Services Platform. Through our analysis, we were able to uncover the source of the attacks, industries targeted, malware samples, and more. Additionally, based on our research, we were able to conclude that exploit attempts for this vulnerability will remain popular for some time, and have listed migitation and recommended actions further below in this blog to avoid future exploit attempts.Background
On March 6, Apache released a... read more >
Memory Forensics Comes into the Light
Recently, fileless malware has shown up in numerous LinkedIn articles, blog posts and research papers. It’s being discussed as the “new” threat to watch out for. I agree that this is an important topic, but I do not agree that it is a new threat. Rather, it has been a threat long ignored and is now being rapidly exploited by attackers.
To give some information about the threat, fileless malware is found only in memory, not in a file on disk. This attack is actually using Meterpreter code inside the physical memory of a domain controller. Along with the presence of Meterpreter, analysts discovered the use of PowerShell scripts within the Windows Registry. For those who are unaware, Meterpreter is a tool from the Metasploit framework, a free hacking tool commonly used by both penetration testers and criminal hackers. Once the attackers have successfully installed Meterpreter, they use various scripts to install a malicious service on the targeted host. After... read more >
Key points: decline in attacks, challenges in securing the retail industry, and an apparent increase in nation state-sponsored cyberattacks
During Q4 ’16, NTT Security researchers observed a noticeable shift in the types of attacks from previous quarters – particularly exhibited by a much narrower scope of attack vectors. Several vulnerabilities such as Oracle Server Backup in the retail industry and Linux password files in the finance industry were specifically targeted – likely indicative of criminals identifying specific flaws and crafting attacks to fit, a sign of more sophisticated and directed efforts.
This shift was also evident in an overall 35 percent decrease in total security-related events across client networks from Q3 ’16 to Q4 ’16, including continued declines of 25 percent in... read more >
Ransomware in the health care industry, the ‘direct cash-back’ revenue model, targeting the Internet of Things (IoT), securing SWIFT networks, and a notable decrease in reconnaissance activity.
During Q3 ’16, NTT Security researchers observed attacks which exhibited the same characteristics as those a year ago in Q3 ’15 – a notable decrease in reconnaissance and an increase in application attacks, with attackers likely maintaining a persistent presence in the target environment.
NTT Security observed a 38 percent drop in security-related events from Q2 ’16 to Q3 ’16. While that seems like an amazing statistic, it included a dramatic 91 percent decrease in reconnaissance and a 64 percent decrease in suspicious activity, which may indicate more of a change in focus than a dramatic fall off in attack volume.
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Shrinking variety of attacks, inside Business Email Compromises, update on ransomware, perspective on China’s new Five Year Plan, and highlights from PCI DSS 3.2.
Solutionary observed a flattening of attack types during Q2 ’16. In recent quarters, web applications made up as much as 42 percent of observed attacks. In Q2 ’16, web application attacks made up 24 percent of such attacks. The top three attack types – web-application... read more >
Evolving attack patterns, views of BASHLITE and JOOMLA, and a look forward on Android
The Solutionary Security Engineering Research Team (SERT) released its Q4 2015 Quarterly Threat Report today.
As the source of 63 percent of all detected attacks and 79 percent of all detected malware, the United States is once again the most hostile source of cyberattacks. As we’ve seen in the past, this does not mean the attackers are within the U.S. but are using U.S. infrastructure as their launching pads. A 77 percent drop in reconnaissance activity from Q3 ’15 to Q4 ’15 indicates reconnaissance activity has plummeted nearly 88 percent from levels seen in Q2 ’15.
Malware detection and trends continue to vary widely from quarter to quarter, but one interesting observation is that the top five sources of malware accounted for 79 percent of all malware detected during Q4 ‘15. While detected malware rose only slightly through Q4... read more >
CVE-2016-0728: Evaluating the Threat Level
On January 14, 2016 researchers at Perception Point identified a 0-day local privilege escalation vulnerability (CVE-2016-0728) in Linux Kernel versions 3.8 to 4.4 (2012 – 2016). This flaw exists due to the kernel’s keyrings security facility used to retain cached security data, authentication keys, encryption keys and other data. Using a local user account, one can free a referenced keyring object and overwrite it to be executed in the kernel, escalating privileges to root. Based on statistics provided by Perception Point, tens of millions of personal computers (PCs), servers and 66% of all Android devices may be vulnerable.