Tag: Remote Code Execution
The 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…
Read MoreF5 Networks researchers have detected a new variant of the “Echobot” malware, now consisting of 71 exploits. The authors continue to follow the trend of arming the malware and for the threat group to expand its operation. These newly added exploits target both old and new vulnerabilities, adding as new ones target industrial control system…
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 get insights into the current threat landscape. In November 2019, new malicious campaign activity was down 40 percent compared to October 2019. While this seems like a large decline,…
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 MoreWhat Does a Typical Brute Force Attack Look Like at a Service Provider? Brute force attack methods vary. It’s not uncommon, for example, for mobile phone service providers to encounter unauthorized online account activity in which an attacker accesses accounts by trying a phone number in combination with a PIN code. These types of attacks…
Read MoreIdentifying Trends in Recent Cyberattacks Web attacks vary quite a lot—by target, technique, objective, and attacker—which makes it difficult for a system owner to assess the instantaneous risk to their particular combination of systems until they’re attacked. To help defenders anticipate the risks they face, we analyzed several months’ worth of global honeypot traffic from…
Read MoreOn Tuesday, December 8th, 2020, FireEye, a leading cybersecurity firm used by governments and companies for penetration testing and forensic services announced that it had been the target of an attack by nation-state actors “with top-tier offensive capabilities,” and that a suite of tools used by FireEye for penetration testing had been stolen. What do…
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APIs and Sectors As more APIs are published, both by large enterprises who want to make their data more available (such as Google) and by smaller, industry-specific organizations hoping to generate value, some interesting industry patterns are also emerging. Of the organizations for which we had sector information, social networking organizations made up the largest…
Read MoreF5 Labs in collaboration with Effluxio researches global attack traffic to gain a better understanding of the cyberthreat landscape. In this installment of regional threat analysis, F5 Labs researchers break down the data collected by our sensors on attacks targeting Latin America from January 1 through March 31, 2021. Cyberattacks happen in many forms, but…
Read MoreAugust Port Scan Data F5 Labs also analyzes data for TCP ports other than 80 and 443 from the Efflux network. The top 10 ports for August 2022 follow patterns we’ve been seeing for years, with port 5900 (VNC) topping the list, followed by a collection of ports used mainly for remote access (ssh, telnet,…
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