Rating:
Navigating to the given webpage, we see a site for "Sagishi Tech". The site looks like a simple shell site, so we aren't expected to exploit it. Instead, under the TEAM section, we see a list of people, each of which has a Twitter link. Under each top level link from the site, I'll enumerate seemingly relevant bits of info as nested items:
Sherman Kern is following:
Checking out Craig Wallace's twitter page, we see he is the CISO at Sagashi: "Sagishi Tech Chief Information Security Officer". Checking his "Tweets and Replies" section, we see a post from yet another new account, "Wade Coldwater":
If you look closely at the background, we see what looks like the flag as item 3, which when submitted, is accepted.
Flag is utflag{situational_awareness_is_key}.
