Created
June 15, 2020 14:08
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CobaltStrike Beacon RSA encryption example
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import M2Crypto | |
import base64 | |
import binascii | |
PUBKEY_TEMPLATE = "-----BEGIN PUBLIC KEY-----\n{}\n-----END PUBLIC KEY-----" | |
plaintext = "0000BEEF00000056D48A3A7104FC17544D5A3752C6EEAED4E404B5015FAD878000000A0000000431302E30093139322E3136382E3230302E313031094445534B544F502D3337325251544D0961646D696E0972756E646C6C33322E657865" | |
buf = M2Crypto.BIO.MemoryBuffer(PUBKEY_TEMPLATE.format('MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhOfC4TICevrbgiUVK5kmvU8aNQNiCfccHxIOV4wzjOn5DpaC49NLoKMsS2fVnMI/f+cbyuqfrXMYmUX8eZDWkmflrBFNOPG8hr8oqhm1EiIvK9S+CsOuLGsEOmefqYk+Gj1nfnJ1uO9ELRv1U+OhmQ77w4u0AZWHPSNr1STYhZQIDAQAB')) | |
pubkey = M2Crypto.RSA.load_pub_key_bio(buf) | |
ciphertext = pubkey.public_encrypt(binascii.unhexlify(plaintext), M2Crypto.RSA.pkcs1_padding) | |
print (base64.b64encode(ciphertext)) |
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