T1573.002 Asymmetric Cryptography — ATT&CK Technique
Adversaries may employ a known asymmetric encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Asymmetric cryptography, also known as public key cryptography, uses a keypair per party: one public that can be freely distributed, and one private. Due to how the keys are generated, the sender encrypts data with the receiver’s public key and the receiver decrypts the data with their private key. This ensures that only the intended recipient can read the encrypted data. Common public key encryption algorithms include RSA and ElGamal. For efficiency, many protocols (including SSL/TLS) use symmetric cryptography once a connection is established, but use asymmetric cryptography to establish or transmit a key. As such, these protocols are classified as Asymmetric Cryptography.
Detection coverage (5)
- Cisco Secure Firewall - Blacklisted SSL Certificate Fingerprint
- Cisco Secure Firewall - Lumma Stealer Download Attempt
- Cisco Secure Firewall - High EVE Threat Confidence
- Cisco Secure Firewall - Intrusion Events by Threat Activity
- Cisco Secure Firewall - Lumma Stealer Outbound Connection Attempt
Malware using this technique
- BRICKSTORM
- NICECURL
- COATHANGER
- Sardonic
- adbupd
- CASTLETAP
- LITTLELAMB.WOOLTEA
- StrongPity
- TinyTurla
- J-magic
- GreyEnergy
- Gomir
- BOLDMOVE
- BADHATCH
- Machete
- WellMess
- Woody RAT
- SombRAT
- DarkWatchman
- Volgmer
- Mispadu
- DCRAT
- REPTILE
- Doki
- IcedID
- Rising Sun
- Hi-Zor
- SnappyTCP
- GoldMax
- POSHSPY
- Kobalos
- Lumma Stealer
- Sykipot
- KEYPLUG
- Cobalt Strike
- PureCrypter
- XTunnel
- WannaCry
- Gazer
- Pay2Key
- Sagerunex
- Uroburos
- Metamorfo
- Trojan.Karagany
- Attor
- SodaMaster
- Grandoreiro
- WellMail
- Bazar
- HiddenFace