potential_solarwinds_mimicking_via_proxy

rule potential_solarwinds_mimicking_via_proxy {
 meta:
    author = "SOC Prime Team, Fireeye"
    description = "This rule was converted from the FireEye hxioc rule. This rule identifies traffic mimiking solarwinds to non-solarwinds domains.  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/Nm4lEAilmxW9"
    version = "0.01"
    created = "2021-03-09"
    category = "proxy"
    mitre = "initial_access, t1195.002"

  events:
((re.regex($selection.target.url, `.*/swip/events.*`) or re.regex($selection.target.url, `.*/swip/systemdescription.*`) or re.regex($selection.target.url, `.*/swip/upload\.ashx.*`) or re.regex($selection.target.url, `.*/swip/upd.*`)) and not (re.regex($selection.target.hostname, `.*solarwinds\.com`)))

  condition:
    $selection
}