infiltrated russian

• внедри́вшийся

  introduced, implemented, integrated, infiltrated, embedded

• втёршийся

  having wormed one's way in, having infiltrated, ingratiated

• за́сланный

  sent (secretly), planted, infiltrated, dispatched

• засыла́емый

  being sent, being dispatched, being infiltrated, (that is) sent in

• затеса́вший

  having got in, having intruded, having wormed one's way in, infiltrated

• просочи́вшийся

  seeped, leaked, filtered (through), infiltrated