rule Backdoor_Linux_Imuler_B{ meta: description = "Backdoor:Linux/Imuler.B,SIGNATURE_TYPE_MACHOHSTR_EXT,04 00 04 00 07 00 00 " strings : $a_01_0 = {2f 74 6d 70 2f 78 6e 74 61 73 6b 7a } //1 /tmp/xntaskz $a_01_1 = {25 73 3a 25 73 3a 25 75 3a 25 66 3a 25 66 } //1 %s:%s:%u:%f:%f $a_01_2 = {28 73 65 72 76 65 72 20 6e 61 6d 65 29 20 28 6d 61 63 68 69 6e 65 20 69 64 29 20 28 66 69 6c 65 20 6e 61 6d 65 29 20 28 74 61 73 6b 20 69 64 29 } //1 (server name) (machine id) (file name) (task id) $a_01_3 = {2f 63 67 69 2d 6d 61 63 2f } //1 /cgi-mac/ $a_01_4 = {2f 75 73 65 72 73 2f 25 73 2f 78 6e 6f 63 7a 31 } //1 /users/%s/xnocz1 $a_01_5 = {2f 75 73 65 72 73 2f 25 73 2f 6c 69 62 72 61 72 79 2f 2e 63 6f 6e 66 62 61 63 6b } //1 /users/%s/library/.confback $a_03_6 = {c1 e8 10 f7 c2 80 80 00 00 0f 44 d0 [0-02] 8d 41 02 [0-02] 0f 45 c1 00 d2 [0-02] 83 d8 03 [0-02] 2f 63 67 69 } //1 condition: ((#a_01_0 & 1)*1+(#a_01_1 & 1)*1+(#a_01_2 & 1)*1+(#a_01_3 & 1)*1+(#a_01_4 & 1)*1+(#a_01_5 & 1)*1+(#a_03_6 & 1)*1) >=4 }