PHP - BackDoor AVG detects this somewhat active Trojan horse and its 33 known variants.

The most popular variants of PHP - BackDoor are PHP - BackDoor.AO, PHP - BackDoor.AG, PHP - BackDoor.Q more ... PHP - BackDoor.CP, PHP - BackDoor.K, PHP - BackDoor.CE, PHP - BackDoor.BX, PHP - BackDoor.CF, PHP - BackDoor, PHP - BackDoor.CB, PHP - BackDoor.J, PHP - BackDoor.AA, PHP - BackDoor.AL, PHP - BackDoor.R, PHP - BackDoor.BF, PHP - BackDoor.CR, PHP - BackDoor.CK, PHP - BackDoor.BH, PHP - BackDoor.AB, PHP - BackDoor.CS, PHP - BackDoor.CG, PHP - BackDoor.AK, PHP - BackDoor.AJ, PHP - BackDoor.AZ, PHP - BackDoor.CM, PHP - BackDoor.BG, PHP - BackDoor.BT, PHP - BackDoor.BO, PHP - BackDoor.CN, PHP - BackDoor.AC, PHP - BackDoor.Z, PHP - BackDoor.CT, PHP - BackDoor.AH