DefenderYara/TrojanDownloader/O97M/Obfuse/TrojanDownloader_O97M_Obfus...

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rule TrojanDownloader_O97M_Obfuse_LHB_MTB{
meta:
description = "TrojanDownloader:O97M/Obfuse.LHB!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
strings :
$a_03_0 = {3d 20 43 49 6e 74 28 41 63 74 69 76 65 44 6f 63 75 6d 65 6e 74 2e 56 61 72 69 61 62 6c 65 73 28 22 [0-25] 22 29 2e 56 61 6c 75 65 20 26 20 4d 69 64 28 [0-20] 2c 20 [0-20] 2c 20 32 29 29 } //1
$a_03_1 = {3d 20 41 63 74 69 76 65 44 6f 63 75 6d 65 6e 74 2e 56 61 72 69 61 62 6c 65 73 28 22 [0-25] 22 29 2e 56 61 6c 75 65 } //1
$a_01_2 = {53 68 65 6c 6c 20 } //1 Shell
$a_03_3 = {47 6f 54 6f 20 [0-20] 90 0c 02 00 45 6e 64 20 53 75 62 } //1
condition:
((#a_03_0 & 1)*1+(#a_03_1 & 1)*1+(#a_01_2 & 1)*1+(#a_03_3 & 1)*1) >=4
}