On April 10, 2013, a collective of politically motivated hacktivists announced a round of planned attacks called #OPUSA. These attacks, slated to begin May 7, 2013, are to be launched against U.S.-based targets. #OPUSA is a follow-up to #OPISRAEL, which were a series of attacks carried out on April 7 against Israeli-based targets. Our goal here is to summarize and inform readers of resources, recommendations, network mitigations, and best practices that are available to prevent, mitigate, respond to, or dilute the effectiveness of these attacks. This blog was a collaborative effort between myself, Kevin Timm, Joseph Karpenko, Panos Kampanakis, and the Cisco TRAC team.
If the attackers follow the same patterns as previously witnessed during the #OPISRAEL attacks, then targets can expect a mixture of attacks. Major components of previous attacks consisted of denial of service attacks and web application exploits, ranging from advanced ad-hoc attempts to simple website defacements. In the past, attackers used such tools as LOIC, HOIC, and Slowloris.
Publicly announced attacks of this nature can have highly volatile credibility. In some cases, the announcements exist only for the purpose of gaining notoriety. In other cases, they are enhanced by increased publicity. Given the lack of specific details about participation or capabilities, the exact severity of the attack can’t be known until it (possibly) happens. Read More »
Tags: advisories, ASA, botnet, botnets, Cisco Security, Cloud Computing, cloud security, data center security, DDoS, exploits, firewall, incident response, IPS, IPS signatures, malware, mitigations, security, targeted attacks, TRAC, vulnerability
Last Friday (April 26), ESET and Sucuri simultaneously blogged about the discovery of Linux/CDorked, a backdoor impacting Apache servers running cPanel. Since that announcement, there has been some confusion surrounding the exact nature of these attacks. Rather than reinvent the analysis that has already been done, this blog post is intended to clear up some of the confusion.
When did Linux/CDorked first appear?
According to Cisco TRAC analysis, the first encounter was on March 4, 2013.
How is Linux/CDorked related to DarkLeech?
The appearance of Linux/CDorked coincided with a drop in the number of DarkLeech infections, an indication the attacker(s) may be one and the same.
Unlike DarkLeech, the Linux/CDorked infections appear to be only targeting Apache servers with cPanel installed. Conversely, DarkLeech was found on servers running a variety of control panels (or not). Read More »
Tags: apache, apache darkleech compromise, apache module injection attacks, Cisco Security, cisco sio, SSHD backdoor, TRAC
The Compressed Pcap Packet Indexing Program (cppip) is a tool to enable extremely fast extraction of packets from a compressed pcap file. This tool is intended for security and network folk who work with large pcap files. This article provides a complete discussion of the tool and is split into two parts. The first part, intended for end-users, will explain in detail how to build and use the tool. The second part, intended for C programmers, covers cppip’s inner workings.
Cppip is a command line utility designed to make packet extraction from large pcap files extremely fast — without having to uncompress the entire file. It relies on pcap files that have been compressed using the freely available bgzip, a backward compatible gzip utility that boasts a special additive — the ability to quickly and cheaply uncompress specific regions of the file on the fly. You will find cppip quite useful if you work with large pcap files and have the need to extract one or more packets for subsequent inspection. As you’ll see, preparing your pcap files for use with cppip is a two step process of compressing the pcap file with bgzip and then indexing it with cppip. But before you can use cppip, you first have to install it. Read More »
Tags: open source, packet capture, pcap, security
Often it is quite surprising how long old, well-known vulnerabilities continue to be exploited. Recently, a friend sent me an example of a malicious script used in an attempted attack against their server:
The script attempted to exploit the Horde/IMP Plesk Webmail Exploit in vulnerable versions of the Plesk control panel. By injecting malicious PHP code in the username field, successful attackers are able to bypass authentication and upload files to the targeted server. These types of attacks could be one avenue used in the DarkLeech compromises. Although not as common as the Plesk remote access vulnerability (CVE-2012-1557) described in the report, it does appear that this vulnerability is being actively exploited. Read More »
Tags: botnet, botnets, Cisco Security, malware, security, security updates, TRAC
Java exploits account for 87% of total web exploits - Cisco 2013 Annual Security Report
This month’s release of the Oracle Java SE Critical Patch Update includes patches for 42 vulnerabilities. Vulnerabilities in the Oracle Java SE Java Runtime Environment (JRE) component have received widespread attention as of late because of the potential for an attacker to bypass security restrictions, access sensitive information, execute arbitrary code, or cause a denial of service condition. To make matters worse, Java vulnerabilities are often harnessed by exploit packs with tremendous success.
Many in the industry, as well as Cisco analysts, advise against having Java installed unless absolutely necessary. And if you must have Java installed, they advise using only the Java plug-in and Java Web Start provided with the latest JDK or JRE 7 release. But is there more to it than that? Read More »
Tags: Cisco Security, cisco sio, java security, java security best practices, java vulnerabilities, oracle java patch update