Common Information
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rule wellmess_regex_used_for_parsing_beacons { meta: description = "Detects WellMess Golang and .NET samples based on the regex they used to parse commands and beacon information" author = "NCSC" hash = "8749c1495af4fd73ccfc84b32f56f5e78549d81feefb0c1d1c3475a74345f6a8" strings: $a = "fileName:(?<fn>.*?)\\sargs:(?<arg>.*)\\snotwait:(?<nw>.*)" ascii wide $b = "<;(?<key>[^;]*?);>(?<value>[^<]*?)<;[^;]*?;>" ascii wide condition: ((uint16(0) == 0x5a4d and uint16(uint16(0x3c)) == 0x4550) or uint32(0) == 0x464c457f) and any of them } |
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Type | Yara Rule |
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Description |