Tag: Botnet
Who Is Scanning for CVE-2023-1389? Back in April, when we first started tracking CVE-2023-1389, we did an analysis of who was scanning for it, and found that the majority of scanning activity was coming from just two ASNs, AS49870 (Alsycon, a hosting provider out of the Netherlands) and AS47890 (Unmanaged Ltd). Running these analyses again,…
Read MoreIntroduction Last month’s Sensor Intel Series for March 2024 uncovered the explosion in traffic hunting for systems affected by CVE-2023-1389. The flaw which related to TP-Link Archer AX21 Wi-Fi routers has quickly become the new darling of threat actors looking to build out their DDoS botnets. No new signatures have been introduced this month. Instead,…
Read MoreBy looking at the table of supported IP protocols, we see that the bot creates raw packets of IGMP, ICMP and TCP protocols. Those packets are just being marked with those protocol numbers, however other fields and headers are not actually set. The packet is filled with “A” characters according to the size specified by…
Read MoreShellshock can take advantage of HTTP headers as well as other mechanisms to enable unauthorized access to the underlying system shell, Bash. The Shellshock attack takes advantage of a flaw in Bash that enables attackers to execute remote commands that would ordinarily be blocked. It’s been rated the highest risk possible because remote command execution…
Read MoreStandard mobile banking trojans post their own fraudulent content over banking applications. The Yasuo-Bot malware takes it a step further by dynamically pulling fraudulent content from the C&C server. Since 2010, mobile malware is on the rise. The first mobile Trojan launched was Zitmo (Zeus in the mobile), a mobile version of the most…
Read MoreIf an attacker wants to launch a powerful Low and Slow DDoS attack, surprisingly, he or she will find only a single tool in this bundle. That is the well-known Slowloris.pl Perl tool, which is not authored by Anonymous at all. R.U.D.Y and other slow POST tools are noticeably missing from this bundle. Another group…
Read MoreDistributed Denial of Service (DDoS) is a common attack method used by hacker groups and individuals to severely hamper or shut down an organization’s online services, causing both monetary and reputation losses. While DDoS attacks have been common since the late 2000s, attack sizes have increased significantly in the past few years. Our new normal…
Read MoreIt’s been another banner year for leakers. In May, Wikileaks released the CIA’s Vault7 cyberwarfare documentation,1 and the Shadow Brokers released NSA exploit information, including the Windows EternalBlue2 exploit. EternalBlue was quickly weaponized into the WannaCry ransomware that pummeled the Internet for days. The Petya/NotPetya ransomware hitting Eastern Europe is also reportedly using EternalBlue to infect machines.…
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: Alternative C&C server address hosted on Pastebin.com One of the challenges that adversaries need to deal with is how to maintain a sustainable C&C infrastructure without being quickly denylisted by enterprise security solutions, or being frequently shut down by ISPs and hosting services following law enforcement and security vendors’ abuse reports. Many…
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