rule HackTool_Linux_SuspUnixReShellCmd_D{ meta: description = "HackTool:Linux/SuspUnixReShellCmd.D,SIGNATURE_TYPE_CMDHSTR_EXT,18 00 18 00 09 00 00 " strings : $a_02_0 = {70 00 79 00 74 00 68 00 6f 00 6e 00 [0-20] 2d 00 63 00 [0-20] 69 00 6d 00 70 00 6f 00 72 00 74 00 } //10 $a_02_1 = {73 00 75 00 62 00 70 00 72 00 6f 00 63 00 65 00 73 00 73 00 2e 00 63 00 61 00 6c 00 6c 00 [0-02] 28 00 [0-02] 5b 00 [0-04] 2f 00 62 00 69 00 6e 00 2f 00 [0-04] 73 00 68 00 } //10 $a_00_2 = {61 00 66 00 5f 00 69 00 6e 00 65 00 74 00 } //1 af_inet $a_00_3 = {73 00 6f 00 63 00 6b 00 5f 00 73 00 74 00 72 00 65 00 61 00 6d 00 } //1 sock_stream $a_02_4 = {63 00 6f 00 6e 00 6e 00 65 00 63 00 74 00 [0-01] 28 00 [0-01] 28 00 [0-50] 29 00 } //1 $a_00_5 = {6f 00 73 00 2e 00 64 00 75 00 70 00 32 00 } //1 os.dup2 $a_00_6 = {31 00 32 00 37 00 2e 00 30 00 2e 00 30 00 2e 00 31 00 } //-80 127.0.0.1 $a_00_7 = {6c 00 6f 00 63 00 61 00 6c 00 68 00 6f 00 73 00 74 00 } //-80 localhost $a_00_8 = {30 00 2e 00 30 00 2e 00 30 00 2e 00 30 00 } //-80 0.0.0.0 condition: ((#a_02_0 & 1)*10+(#a_02_1 & 1)*10+(#a_00_2 & 1)*1+(#a_00_3 & 1)*1+(#a_02_4 & 1)*1+(#a_00_5 & 1)*1+(#a_00_6 & 1)*-80+(#a_00_7 & 1)*-80+(#a_00_8 & 1)*-80) >=24 }