Tag: CVE-2017-5638
No matter how application-savvy you are, it should be fairly obvious that this is not a typical Content-Type header for an HTTP request. According to the RFC, Content-Type is usually of the form “type/subtype”7. This leviathan contains a valid Content-Type header in the very first line—multipart/form-data—but even a rudimentary BNF parser would flag this as a…
Read MoreFigure 1: CVE-2017-5638 campaign The exploit triggers the vulnerability via the Content-Type header value, which the attacker customized with shell commands to be executed if the server is vulnerable. In the first days of this campaign, shell commands were observed to infect the machine with the “PowerBot” malware, which is written in PERL, and uses…
Read MoreF5 threat researchers have discovered a new Apache Struts campaign. This new campaign is a sophisticated multi-staged attack targeting internal networks with the NSA-attributed EternalBlue and EternalSynergy exploits. We have dubbed the campaign “Zealot” based on the name of the zip file containing the python scripts with the NSA-attributed exploits. As we continue to research…
Read MoreFigure 2: Latest attack request targeting Windows servers As shown in Figure 2, the latest attack requests are targeting the same URL, keeping the same HTTP header values and the same exploit structure, however, they are now using Windows shell commands to download and execute a file. Using the Windows certutil Tool While Linux…
Read MoreFigure 2: Weblogic WLS-WSAT campaign attempting to download and execute the same Windows executable file This attempt to download the same file immediately indicated to us that the same attacker was using different exploits in the operation. Unfortunately, these files weren’t available to download from the original server nor from other malware repositories, so…
Read MoreFigure 14: Statistics of the Monero mining payment address belonging to the attacker The attacker has earned 8.76 Monero coins by now,4 with a current price of 110.79 USD per a Monero coin,5 which totals to 970.52 USD. According to the information provided on the mining server website, this operation began around June 1.…
Read MoreAs we can see in Figure 8, the developers for SG Optimizer added a permission_callback command to the newly registered REST API routes. This indicates that prior to version 5.0.13, the SG Optimizer plugin had various privilege escalation vulnerabilities. Those vulnerabilities allowed any threat actor to send a malicious request to these registered REST API…
Read MoreOracle WebLogic WLS Security Component RCE (CVE-2019-2725) On April 21, 2019, information regarding a deserialization vulnerability in Oracle WebLogic Server was published by KnownSec 404 Team. According to the CVE, the vulnerability exists in the Web Services subcomponent of Oracle WebLogic. Similar to the previous Oracle WebLogic vulnerability discussed above, this new vulnerability also stems…
Read MoreSecurity researchers at F5 Networks constantly monitor web traffic at various locations all over the world. This allows us to detect “in the wild” malware, and to get an insight into the current threat landscape. In December 2019, security researchers detected a 100% increase in new threat campaigns as compared to November 2019. This was…
Read MoreThis view is also notable since it is the first time we’re seeing any of these newly added, high-profile CVEs show up. Second row, far right is CVE-2014-6271, an OS command injection vulnerability more commonly known as Shellshock/Bashdoor. Shellshock shows more targeting variability from month to month than most CVEs (not including CVE-2020-11625, which has…
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