MAL_ELF_SALTWATER_Jun23_1

rule MAL_ELF_SALTWATER_Jun23_1 {
   meta:
      description = "Detects SALTWATER malware used in Barracuda ESG exploitations (CVE-2023-2868)"
      author = "Florian Roth"
      reference = "https://www.barracuda.com/company/legal/esg-vulnerability"
      date = "2023-06-07"
      score = 80
      hash1 = "601f44cc102ae5a113c0b5fe5d18350db8a24d780c0ff289880cc45de28e2b80"
      id = "10a038f6-6096-5d3a-aaf5-db441685102b"
   strings:
      $x1 = "libbindshell.so"
      
      $s1 = "ShellChannel"
      $s2 = "MyWriteAll"
      $s3 = "CheckRemoteIp"
      $s4 = "run_cmd"
      $s5 = "DownloadByProxyChannel"
      $s6 = "[-] error: popen failed"
      $s7 = "/home/product/code/config/ssl_engine_cert.pem"
   condition:
      uint16(0) == 0x457f and
      filesize < 6000KB and (
         ( 1 of ($x*) and 2 of them )
         or 3 of them
      ) or all of them
}