40 lines
2.6 KiB
Plaintext
40 lines
2.6 KiB
Plaintext
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rule TrojanDownloader_O97M_Ursnif_AR_MTB{
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meta:
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description = "TrojanDownloader:O97M/Ursnif.AR!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,0c 00 0c 00 03 00 00 "
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strings :
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$a_01_0 = {55 52 4c 44 6f 77 6e 6c 6f 61 64 54 6f 46 69 6c 65 41 22 20 28 } //1 URLDownloadToFileA" (
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$a_01_1 = {62 61 63 2e 39 6b 6f 6e 3d 6c 3f 70 68 70 2e 70 32 33 69 30 6f 69 61 2f 35 38 6f 6c 30 32 65 77 2f 6d 6f 63 2e 38 66 6a 6a 66 62 62 2f 2f 3a 70 74 74 68 22 2c } //10 bac.9kon=l?php.p23i0oia/58ol02ew/moc.8fjjfbb//:ptth",
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$a_03_2 = {28 22 74 6d 70 22 29 20 26 20 22 5c [0-09] 2e 74 6d 70 22 } //1
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condition:
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((#a_01_0 & 1)*1+(#a_01_1 & 1)*10+(#a_03_2 & 1)*1) >=12
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}
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rule TrojanDownloader_O97M_Ursnif_AR_MTB_2{
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meta:
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description = "TrojanDownloader:O97M/Ursnif.AR!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,05 00 05 00 05 00 00 "
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strings :
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$a_01_0 = {3d 20 43 68 72 28 31 31 35 20 2b 20 30 29 20 2b 20 22 48 45 4c 4c 2e 22 } //1 = Chr(115 + 0) + "HELL."
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$a_03_1 = {2e 43 6f 6e 74 72 6f 6c 73 28 [0-55] 29 2e 54 65 78 74 } //1
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$a_03_2 = {4f 70 65 6e 20 54 72 69 6d 28 [0-55] 29 20 46 6f 72 20 4f 75 74 70 75 74 20 41 73 20 23 } //1
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$a_03_3 = {50 72 69 6e 74 20 23 ?? 2c 20 54 72 69 6d 28 } //1
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$a_01_4 = {2e 56 61 6c 75 65 } //1 .Value
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condition:
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((#a_01_0 & 1)*1+(#a_03_1 & 1)*1+(#a_03_2 & 1)*1+(#a_03_3 & 1)*1+(#a_01_4 & 1)*1) >=5
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}
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rule TrojanDownloader_O97M_Ursnif_AR_MTB_3{
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meta:
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description = "TrojanDownloader:O97M/Ursnif.AR!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,04 00 04 00 04 00 00 "
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strings :
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$a_03_0 = {3d 20 45 6e 76 69 72 6f 6e 28 [0-0f] 29 0d 0a 49 66 20 53 65 63 6f 6e 64 28 22 [0-02] 3a [0-02] 3a [0-02] 22 29 20 3d 20 22 [30-39] [30-39] 22 20 54 68 65 6e 0d 0a [0-0a] 20 3d 20 52 65 70 6c 61 63 65 28 90 1b 05 2c 20 22 5c 22 2c 20 22 5c 5c 22 29 } //1
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$a_03_1 = {52 65 70 6c 61 63 65 28 [0-0f] 2c 20 22 5c 22 2c 20 22 5c 5c 22 29 90 0a 28 00 90 1b 00 20 3d 20 } //1
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$a_01_2 = {4d 73 67 42 6f 78 20 28 22 45 72 72 6f 72 3a 22 20 26 20 76 62 43 72 4c 66 20 26 20 22 43 6f 6e 74 65 6e 74 20 6e 6f 74 20 61 76 61 69 6c 61 62 6c 65 22 29 } //1 MsgBox ("Error:" & vbCrLf & "Content not available")
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$a_03_3 = {53 65 74 20 [0-0f] 20 3d 20 43 72 65 61 74 65 4f 62 6a 65 63 74 28 22 53 63 72 69 70 74 69 6e 67 2e 46 69 6c 65 53 79 73 74 65 6d 4f 62 6a 65 63 74 22 29 [0-5f] 44 69 6d 20 [0-0f] 20 41 73 20 4f 62 6a 65 63 74 90 08 00 04 53 65 74 20 90 1b 02 20 3d 20 90 1b 00 2e 43 72 65 61 74 65 54 65 78 74 46 69 6c 65 28 [0-0f] 2c 20 54 72 75 65 2c 20 54 72 75 65 29 [0-0a] 90 1b 02 2e 57 72 69 74 65 } //1
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condition:
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((#a_03_0 & 1)*1+(#a_03_1 & 1)*1+(#a_01_2 & 1)*1+(#a_03_3 & 1)*1) >=4
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} |