🐾 - 🚨 Suspicious Windows 11 🪟 TLSv1.0 connection to SMTPS port - Possible encrypted exfiltration - T1048.002 - Seen in 🐍 SnakeKeylogger ⌨ attack - Suricata Rule 3321312 (pawpatrules)

🐾 - 🚨 Suspicious Windows 11 🪟 TLSv1.0 connection to SMTPS port - Possible encrypted exfiltration - T1048.002 - Seen in 🐍 SnakeKeylogger ⌨ attack

SID: 3321312Rev: 546 viewsHistory

Sourcepawpatrules

CreatedJuly 29, 2024

UpdatedAugust 14, 2024

Classificationtargeted-activity

alert tls $HOME_NET any -> $EXTERNAL_NET 587 (msg:"🐾 - 🚨 Suspicious Windows 11 🪟 TLSv1.0 connection to SMTPS port - Possible encrypted exfiltration - T1048.002 - Seen in 🐍 SnakeKeylogger ⌨ attack"; flow:to_server, stateless; ja3.hash; content:"8fffe46776bf62f45716b436b6dbc131"; ssl_version:tls1.0; reference:url,https://attack.mitre.org/techniques/T1048/002/; reference:url,https://x-junior.github.io/malware%20analysis/2022/06/24/Snakekeylogger.html; reference:url,https://malpedia.caad.fkie.fraunhofer.de/details/win.404keylogger; reference:url,https://samples.vx-underground.org/Papers/Malware%20Defense/Malware%20Analysis/2024/2024-06-30%20-%20Deep%20Analysis%20of%20Snake%20(404%20keylogger).pdf; target:src_ip; metadata:attack_target Client_and_Server, signature_severity Major, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1048_002, mitre_technique_name Exfiltration_Over_Alternative_Protocol_Exfiltration_Over_Asymmetric_Encrypted_Non-C2_Protocol, created_at 2024_07_29, updated_at 2024_08_14; sid:3321312; rev:5; classtype:targeted-activity;)

References

url	https://attack.mitre.org/techniques/T1048/002/
url	https://x-junior.github.io/malware%20analysis/2022/06/24/Snakekeylogger.html
url	https://malpedia.caad.fkie.fraunhofer.de/details/win.404keylogger
url	https://samples.vx-underground.org/Papers/Malware%20Defense/Malware%20Analysis/2024/2024-06-30%20-%20Deep%20Analysis%20of%20Snake%20(404%20keylogger).pdf

Metadata

attack targetClient_and_Server

signature severityMajor

affected productWindows_XP_Vista_7_8_10_11_Server_32_64_Bit

mitre tactic idTA0010

mitre tactic nameExfiltration

mitre technique idT1048_002

mitre technique nameExfiltration_Over_Alternative_Protocol_Exfiltration_Over_Asymmetric_Encrypted_Non-C2_Protocol