58 lines
2.1 KiB
Text
58 lines
2.1 KiB
Text
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rule PolishBankRAT_srservice_xorloop {
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meta:
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author = "Booz Allen Hamilton Dark Labs"
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description = "Finds the custom xor decode loop for <PolishBankRAT-srservice>"
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reference = "https://blog.cyber4sight.com/2017/02/technical-analysis-watering-hole-attacks-against-financial-institutions/"
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strings:
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$loop = { 48 8B CD E8 60 FF FF FF 48 FF C3 32 44 1E FF 48 FF CF 88 43 FF }
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condition:
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(uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and $loop
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}
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rule PolishBankRAT_fdsvc_xor_loop {
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meta:
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author = "Booz Allen Hamilton Dark Labs"
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description = "Finds the custom xor decode loop for <PolishBankRAT-fdsvc>"
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reference = "https://blog.cyber4sight.com/2017/02/technical-analysis-watering-hole-attacks-against-financial-institutions/"
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strings:
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$loop = {0F B6 42 FF 48 8D 52 FF 30 42 01 FF CF 75 F1}
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condition:
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(uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and $loop
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}
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rule PolishBankRAT_fdsvc_decode2 {
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meta:
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author = "Booz Allen Hamilton Dark Labs"
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description = "Find a constant used as part of a payload decoding function in PolishBankRAT-fdsvc"
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reference = "https://blog.cyber4sight.com/2017/02/technical-analysis-watering-hole-attacks-against-financial-institutions/"
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strings:
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$part1 = {A6 EB 96}
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$part2 = {61 B2 E2 EF}
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$part3 = {0D CB E8 C4}
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$part4 = {5A F1 66 9C}
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$part5 = {A4 80 CD 9A}
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$part6 = {F1 2F 46 25}
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$part7 = {2F DB 16 26}
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$part8 = {4B C4 3F 3C}
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$str1 = "This program cannot be run in DOS mode"
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condition:
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(uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and all of them
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}
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rule decoded_PolishBankRAT_fdsvc_strings {
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meta:
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author = "Booz Allen Hamilton Dark Labs"
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description = "Finds hard coded strings in PolishBankRAT-fdsvc"
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reference = "https://blog.cyber4sight.com/2017/02/technical-analysis-watering-hole-attacks-against-financial-institutions/"
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strings:
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$str1 = "ssylka" wide ascii
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$str2 = "ustanavlivat" wide ascii
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$str3 = "poluchit" wide ascii
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$str4 = "pereslat" wide ascii
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$str5 = "derzhat" wide ascii
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$str6 = "vykhodit" wide ascii
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$str7 = "Nachalo" wide ascii
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condition:
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(uint16(0) == 0x5A4D and uint32(uint32(0x3C)) == 0x00004550) and 4 of ($str*)
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}
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