Washington (CNN) After months of bombing by the U.S. and coalition forces, ISIS remains undefeated on the ground and has now entered a new phase, using the cyber-world as a weapon.

For evidence of the evolution, one need look no further than the recent ISIS inspired attack in Garland, Texas, which was carried out after gunman Elton Simpson publicly posted a tweet on the Internet, using the hashtag #TexasAttack.

It's a trend that has captured the attention of law enforcement and now the military.

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"The thing I always look for is at what point do groups, for example, decide that they need to move from viewing the Internet as a source of recruitment, as a way to spread ideology, as a way to spread their message, their propaganda, do we see it move from that into something for greater concern as viewing it as a potential weapon system, " said Adm. Michael Rogers, director of the National Security Agency and the Pentagon's top cyber-warrior.