Tag: weblogic
Figure 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 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 throughout the world. This allows us to detect “in the wild” malware, and to get an insight into the current threat landscape. Here’s an overview of what we saw in May 2019. Throughout the month of May, the team detected 10 new attack…
Read MoreCryptominers are frequently included in recent attack campaigns; if you would like to learn more about cryptominers, please check out some of our previous monthly attack campaign wrap-ups. Conclusion Campaigns aimed at mining cryptocurrency and targeting Oracle WebLogic continue to rise in popularity. This has been fueled in part by the zero-day vulnerability found in…
Read MoreConclusion Campaigns aimed at mining cryptocurrency and targeting Oracle WebLogic are clearly on the rise, and F5 researchers anticipate this trend to continue. This has been fueled partly by the zero-day vulnerability (CVE-2019-2725)found in April 2019. Oracle WebLogic is used widely by large corporations, and the servers are resource-intensive. This attracts threat actors looking to…
Read MoreA vulnerable FortiGate SSL VPN server responds to this request with contents of the sslpvpn_websession file, which contains the username and password of a user. This information can be used or sold to threat actors in order to compile brute force and credential stuffing lists. While reconnaissance campaigns do not actively exploit systems, they enable…
Read MoreThe script uses random function and variable names to avoid detection by antivirus engines. It also contains another Base64-encoded payload. The threat actor uses .Net APIs to call the Windows API. For example, the script uses the .NET API to find address of VirtualAlloc function exported by kernel32.dll. It then marshals the shellcode by using…
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