Query: Multiple failed authentications followed by Hide Infrastructure
Matching passage: T1665 Hide Infrastructure. Tactics: command and control. Description: Adversaries may manipulate network traffic in order to hide and evade detection of their C2 infrastructure. This can be accomplished by identifying and filtering traffic from defensive tools,(Citation: TA571) masking malicious domains to obfuscate the true destination from both automated scanning tools and security researchers,(Citation: Schema-abuse)(Citation: Facad1ng)(Citation: Browser-updates) and otherwise hiding malicious artifacts to delay discovery and prolong the effectiveness of adversary infrastructure that could otherwise be identified, blocked, or taken down entirely. C2 networks may include the use of [Proxy](https://attack.mitre.org/techniques/T1090) or VPNs to disguise IP addresses, which can allow adversaries to blend in with normal network traffic and bypass conditional access policies or anti-abuse protections. For example, an adversary may use a virtual private cloud to spoof their IP address to closer align with a victim's IP address ranges. This may also bypass security measures relying on geolocation of the source IP address.(Citation: sysdig)(Citation: Orange Residential Proxies) Adversaries may also attempt to filter network traffic in order to evade defensive tools in numerous ways, including blocking/redirecting common incident responder or security appliance user agents.(Citation: mod_rewrite)(Citation: SocGholish-update) Filtering traffic based on IP and geo-fencing may also avoid automated sandboxing or researcher activity (i.e., [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497)).(Citation: TA571)(Citation: mod_rewrite) Hiding C2 infrastructure may also be supported by [Resource Development](https://attack.mitre.org/tactics/TA0042) activities such as [Acquire Infrastructure](https://attack.mitre.org/techniques/T1583) and [Compromise Infrastructure](https://attack.mitre.org/techniques/T1584). For example, using widely trusted hosting services or domains such as prominent URL shortening providers or marketing ser
Near-miss passage: T1568.001 Fast Flux DNS. Tactics: command and control. Description: Adversaries may use Fast Flux DNS to hide a command and control channel behind an array of rapidly changing IP addresses linked to a single domain resolution. This technique uses a fully qualified domain name, with multiple IP addresses assigned to it which are swapped with high frequency, using a combination of round robin IP addressing and short Time-To-Live (TTL) for a DNS resource record.(Citation: MehtaFastFluxPt1)(Citation: MehtaFastFluxPt2)(Citation: Fast Flux - Welivesecurity) The simplest, "single-flux" method, involves registering and de-registering an addresses as part of the DNS A (address) record list for a single DNS name. These registrations have a five-minute average lifespan, resulting in a constant shuffle of IP address resolution.(Citation: Fast Flux - Welivesecurity) In contrast, the "double-flux" method registers and de-registers an address as part of the DNS Name Server record list for the DNS zone, providing additional resilience for the connection. With double-flux additional hosts can act as a proxy to the C2 host, further insulating the true source of the C2 channel.