![]() ![]() The HELP resource is a Windows shortcut file that executes help.scr, which is a copy of the bot saved into any network resources it successfully accesses. ![]() Invoke-Mimikatz -Command ‘”privilege::debug” “sekurlsa::logonPasswords full”’ noprofile Set-ExecutionPolicy Unrestricted cd C:/ProgramData/ Import-Module. The Invoke-Mimikatz.ps1 script executes the powershell commands below, essentially dumping credentials from the infected system into C:/ProgramData/powershellspread.txt. It is a simple UPX packed 64-bit PE file that merely executes the Invoke-Mimikatz.ps1 powershell script. We first observed the SHELL resource toward the end of June 2020 (based off the compilation timestamp). This version of MIMIKATZ is a powershell script used to steal credentials and escalate privileges. The first resource file we investigated was the MIMIKATZ tool. These resources files allow adversaries to steal credentials and propagate the malware. ![]() While reviewing the additional Windows PE files uncovered, we discovered three new resource files used (Figure 1). Details New Windows Resource Files MIMIKATZ This allows controllers to fulfill their needs in one fell swoop rather than forcing them to use booter/stresser services or other DDoS botnets to foil the progress of their rival miscreants. However, given the prevalence of DDoS attacks within the illicit cryptomining arena, it makes a weird kind of sense to have a ‘one-stop’ bot. This approach allowed us to see the precise details of the attack types supported by the bot, including what attack-time options are available to the botnet operator and whether any innovation in terms of DDoS attack capabilities are incorporated into its portfolio.Īt first blush, a hybrid cryptojacker/DDoS bot seems a bit unusual. The fact that it can run on Linux-based systems means that it can potentially compromise and make use of high-performance, high-bandwidth servers in internet data centers (IDCs), with each node packing a larger punch in terms of DDoS attack capacity than is typical of most bots running on Windows or IoT-based Linux devices.Īs part of our analysis of the Lucifer bot code, we set up a simulated Lucifer botnet in our lab, and induced it to generate DDoS attack traffic so that we could take packet captures in a controlled environment and analyze the traffic patterns. This is certainly the case with the Lucifer bot. Nor are they confined to running on Windows operating system just like all IoT-based bots, some DDoS-capable bots that compromise and abuse Windows computers run on Linux, as well. While IoT botnets have garnered significant attention in recent times, malware targeting Windows operating systems haven’t disappeared. This includes capturing and analyzing code for a variety of malware types such as IoT DDoS-capable botnets. IntroductionĪSERT continually researches new DDoS attack methodologies, along with the infrastructure that bad actors use to launch those attacks.
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