rule HackTool_Linux_Chisel_A{ meta: description = "HackTool:Linux/Chisel.A,SIGNATURE_TYPE_CMDHSTR_EXT,0a 00 0a 00 02 00 00 " strings : $a_00_0 = {63 00 68 00 69 00 73 00 65 00 6c 00 20 00 73 00 65 00 72 00 76 00 65 00 72 00 } //10 chisel server $a_00_1 = {63 00 68 00 69 00 73 00 65 00 6c 00 20 00 63 00 6c 00 69 00 65 00 6e 00 74 00 } //10 chisel client condition: ((#a_00_0 & 1)*10+(#a_00_1 & 1)*10) >=10 }