14 lines
738 B
Plaintext
14 lines
738 B
Plaintext
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rule TrojanDownloader_O97M_Ursnif_AY_MTB{
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meta:
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description = "TrojanDownloader:O97M/Ursnif.AY!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
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strings :
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$a_01_0 = {2e 63 72 65 61 74 65 45 6c 65 6d 65 6e 74 28 22 62 36 34 22 29 } //1 .createElement("b64")
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$a_01_1 = {3d 20 22 62 69 6e 2e 62 61 73 65 36 34 22 } //1 = "bin.base64"
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$a_03_2 = {4f 70 65 6e 20 [0-08] 20 2b 20 [0-08] 20 2b 20 22 [0-05] 5c [0-08] 2e 78 73 6c 22 20 46 6f 72 20 4f 75 74 70 75 74 20 41 73 20 23 } //1
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$a_03_3 = {43 61 6c 6c 20 56 42 41 2e 49 6e 74 65 72 61 63 74 69 6f 6e 2e 53 68 65 6c 6c 40 28 53 74 72 52 65 76 65 72 73 65 28 [0-08] 29 29 } //1
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condition:
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((#a_01_0 & 1)*1+(#a_01_1 & 1)*1+(#a_03_2 & 1)*1+(#a_03_3 & 1)*1) >=4
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} |