In this article we will discuss common causes of TLS related issue and troubleshooting steps.īefore we start, let us get to know how SSL/TLS connections are established. A typical ones such as "Could not create SSL/TLS secure channel." "SSL Handshake Failed", etc. Exceptions are vary dramatically depending on the client and server types. You may experience exceptions or errors when establishing TLS connections with Azure services. It is also worth noting that as of Jan 4, 2017, AlienVault published a signature to the public Emerging Threats feed (Figure 3) to identify activity with the associated wallet ID for this threat actor.Nowadays almost every service support connection over TLS to encrypt data in transit to protect data. Table 2: Binaries that have been observed staging during the campaign. Analysis of the wallet associated with this activity shows that the threat actor/s have been paid out a total of 603.535663865 XMR, which, at the current exchange rate, equates to approximately $260,000 (note that, with cryptocurrency price fluctuations, this number is purely a point in time estimate). Analysis of the binaries show they are using the standard stratum connection string “stratum+tcp://:80” with a wallet ID of “4AQe5sAFWZKECiaeNTt59LG7kVtqRoSRJMjrmQ6GiMFAeUvo元MFeTE6zwwHkFPrAyNw2JHDxUSWL82RiZThPpk4SEg7Vqe”. The executable binaries that are downloaded during staging are publicly known and identified Monero Coin Miners (Table 2). In this class of vulnerability, server software attempts to deserialize untrusted content without validation allowing an attacker to abuse the application for code execution.įigure 2: Complete staging process without execution signal. Java deserialization vulnerabilities are not unique to Oracle, and plague several older versions of WebSphere, JBoss, Jenkins, OpenNMS, etc. Throughout the recently observed campaign, attackers originating from multiple source addresses (191.101.18084, 78) leveraged CVE-2017-10271, a java deserialization vulnerability in the Oracle WebLogic Server, to target outdated servers (Figure 1). Attack Walkthrough ExploitationĪttackers primarily rely on opportunistic exploitation of well known (and signatured) vulnerabilities in applications running on internet connected systems, and exhibit complete disregard for stealth or disguise. In this post, we will provide a walkthrough of an attack campaign that the Gigamon ATR team has witnessed in the wild over the past several weeks and break down some key lessons learned from the attack. Simply stated, criminal post-exploitation has become an efficient and wide-spread business that poses a threat to all enterprises, especially those with a significant and historical internet footprint that may contain undocumented or obsolete systems and pages. Is it really a criminal performing coin mining or is that a disguise? What will they do with the access if coin mining is no longer profitable? The Gigamon Applied Threat Research (ATR) team has witnessed incidents stemming from criminals who decided to sell their access to other parties, and the increasingly common malware-as-a-service scheme contributes to the risk from “simple” coin mining. While on the surface, the business impact from coin mining seems minimal, having an unauthorized party in control of systems you own introduces a dangerous wild card. This demand for mass compromise has forced these threat actors to adopt automated methods that rely on opportunistic exploitation to outpace defenders, increasing the number of victims as quickly as possible with minimal cost. To succeed in making a large profit, the actors must continually compromise a large number of victims and utilize significant computing resources. With the recent surge in popularity and increasing value of cryptocurrency, it should be no surprise that financially motivated threat actors have begun leveraging their victims to contribute to “mining” efforts, where the computing resources of the victim are used to generate cryptocurrency for the threat actor.
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