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Apache Struts 2 Exploit Analysis

Data Analysis of CVE-2017-5638 Exploit Attempts

Terrance DeJesus

March 23, 2017 - Posted by Terrance DeJesus to Threat Intelligence

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 >

Fileless Malware

Memory Forensics Comes into the Light

David Biser

March 02, 2017 - Posted by David Biser to Threat Intelligence

Metasploit

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 >

Hacking Gift Cards: Part 2

Ways to safeguard against gift card exploitable vulnerabilities

Will Caput

July 07, 2016 - Posted by Will Caput to Security Insight

In my previous blog, Hacking Gift Cards, I outlined how you can get free food by enumerating valid gift cards with Burp Intruder. This blog continues that narrative, but adds in other types of cards and attack vectors. In addition, I’ll illustrate some problems with gift card balance checking, and how gift cards can be easily enumerated without the card holder’s knowledge or permission. In some cases, the security surrounding a gift card is so bad you don’t even need to use Burp Intruder.

Prerequisites:

Burp Suite Professional
https://portswigger.net/burp/

In Hacking Gift Cards Part 1, I discussed six gift cards that had a discernible pattern. Identifying the pattern allowed us to find values on cards that were already sold and had value. In searching for more targets, I... read more >

Server Victimology

Understanding the How and Why Ransomware Targets are Identified and Pursued

Ramece Cave

June 16, 2016 - Posted by Ramece Cave to Security Insight

Server Victimology - What Makes a Server a Target?

Welcome back to our discussion about the Second Victim. You’ll recall that these are the unknown victims in a ransomware campaign. These are the servers used to deliver a message or accept payment, completely under someone else’s control and all without your knowledge. Today we are exploring some of the aspects that elevates a server from unknown, to target, and finally a victim. Whether its contents are being held for ransom, or they are a pawn in the actor’s nefarious game.

A researcher that I follow recently issued a “Heads Up” warning that new ransomware is targeting servers. At the time of the reporting there were at least 400 affected servers. After doing some digging, I confirmed that at least 40 servers are victims of ransomware and at least two dozen others may be affected, but are taking steps to remediate the problem. But how did this happen? What was it about these servers that made them vulnerable? Plagued by these questions, I... read more >

The Evolution of Ransomware

Think You've Seeen It All from Ransomware?

David Biser

April 26, 2016 - Posted by David Biser to Security Insight

The Evolution of Ransomware

We’ve all seen them. Recent headlines filled with reports of massive ransomware attacks against a multitude of targets. With healthcare organizations, financial institutions, and even the government falling prey, it would appear that none are safe. Many, many blogs and security posts have been issued warning businesses against this attack vector, seemingly to no avail!  So, you might ask: “Why should I continue reading this blog post?” The answer is simple. Ransomware is evolving!

That’s right – you haven’t seen the end of ransomware or its effects. Since so many businesses are learning to effectively recover from devastating ransomware attacks, cyber criminals are adopting new methods to continue their campaign. Recent research from Talos indicates that ransomware authors are changing their weaponry to be even more... read more >

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NTT Security (US), Inc. (formerly Solutionary) is a security consulting and managed security services provider. The NTT Security blog is a place for IT professionals to both learn and talk about the latest in IT security and compliance.

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