20 lines
1.6 KiB
Plaintext
20 lines
1.6 KiB
Plaintext
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rule TrojanDownloader_O97M_Obfuse_DR{
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meta:
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description = "TrojanDownloader:O97M/Obfuse.DR,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 0a 00 00 "
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strings :
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$a_03_0 = {3d 20 47 65 74 4f 62 6a 65 63 74 28 [0-60] 20 2b 20 [0-60] 29 2e 20 5f } //2
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$a_03_1 = {43 72 65 61 74 65 ?? 20 5f } //1
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$a_01_2 = {22 77 69 6e 6d 22 20 2b 20 22 67 6d 74 73 3a 57 69 6e 33 32 5f 50 72 6f 63 65 73 73 22 29 20 2b } //1 "winm" + "gmts:Win32_Process") +
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$a_01_3 = {22 77 69 6e 6d 22 20 2b 20 22 67 6d 74 73 3a 57 69 6e 33 22 20 2b 20 22 32 5f 50 72 6f 63 65 73 73 22 29 20 2b } //1 "winm" + "gmts:Win3" + "2_Process") +
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$a_03_4 = {22 77 69 6e 6d 22 20 2b 20 [0-10] 20 2b 20 22 67 6d 74 73 3a 57 69 6e 33 22 20 2b 20 22 32 5f 50 72 6f 63 22 20 2b 20 22 65 73 73 22 29 20 2b 20 } //1
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$a_03_5 = {22 77 69 6e 6d 22 20 2b 20 [0-10] 20 2b 20 22 67 6d 74 73 22 20 2b 20 22 3a 57 69 6e 33 22 20 2b 20 22 32 5f 50 72 6f 63 22 20 2b 20 22 65 73 73 22 29 20 2b 20 } //1
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$a_03_6 = {2b 20 22 32 5f 50 72 6f 63 22 20 2b 20 22 65 73 73 22 29 20 2b 20 [0-10] 20 2b 20 [0-10] 20 2b 20 } //1
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$a_03_7 = {2b 20 22 32 5f 22 20 2b 20 22 50 72 6f 63 22 20 2b 20 22 65 73 73 22 29 20 2b 20 [0-10] 20 2b 20 [0-10] 20 2b 20 } //1
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$a_03_8 = {22 67 6d 74 73 3a 57 69 6e 33 22 20 2b 20 22 32 5f 50 72 6f 63 22 20 2b 20 22 65 73 73 22 29 20 2b 20 [0-10] 20 2b 20 } //1
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$a_01_9 = {22 67 6d 74 73 22 20 2b 20 22 3a 57 69 6e 33 22 20 5f } //1 "gmts" + ":Win3" _
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condition:
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((#a_03_0 & 1)*2+(#a_03_1 & 1)*1+(#a_01_2 & 1)*1+(#a_01_3 & 1)*1+(#a_03_4 & 1)*1+(#a_03_5 & 1)*1+(#a_03_6 & 1)*1+(#a_03_7 & 1)*1+(#a_03_8 & 1)*1+(#a_01_9 & 1)*1) >=4
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} |