MAL_ELF_ReverseShell_SSLShell_Jun23_1

rule MAL_ELF_ReverseShell_SSLShell_Jun23_1 {
   meta:
      description = "Detects reverse shell named SSLShell used in Barracuda ESG exploitation (CVE-2023-2868)"
      author = "Florian Roth"
      reference = "https://www.barracuda.com/company/legal/esg-vulnerability"
      date = "2023-06-07"
      score = 75
      hash1 = "8849a3273e0362c45b4928375d196714224ec22cb1d2df5d029bf57349860347"
      id = "91b34eb7-61d2-592e-a444-249da43994ca"
   strings:
      $sc1 = { 00 2D 63 00 2F 62 69 6E 2F 73 68 00 }
      $s1 = "SSLShell"
   condition:
      uint32be(0) == 0x7f454c46
      and uint16(0x10) == 0x0002
      and filesize < 5MB
      and all of them
}