🐾 - 🔔 SMB - Suspicious session setup response for NTLMSSP_CHALLENGE 🪟 Possible Responder NTLMv2 response for 🎩 Active Directory or Windowscredentials capturing 🥷 - T1040
Sourcepawpatrules
CreatedJanuary 6, 2024
UpdatedMay 26, 2026
Classificationcredential-theft
alert tcp any 445 -> any any (msg:"🐾 - 🔔 SMB - Suspicious session setup response for NTLMSSP_CHALLENGE 🪟 Possible Responder NTLMv2 response for 🎩 Active Directory or Windowscredentials capturing 🥷 - T1040"; flow:to_client, stateless; content:"|fe 53 4d 42 40 00|"; content:"|16 00 00 c0 01 00|"; content:"|01 00 00 00 00 00 00 00|"; content:"|ff fe 00 00 00 00 00 00|"; content:"|00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|"; fast_pattern; content:"|09 00 00 00 48 00|"; content:"|4e 54 4c 4d 53 53 50 00 02 00 00 00|"; content:"|08 00 08 00 38 00 00 00|"; content:"|a6 00 a6 00 40 00 00 00|"; content:"|02 00 08 00|"; content:"|01 00 1e 00 57 00 49 00 4e 00 2d 00|"; content:"|05 00 14 00|"; content:"|06 03 80 25 00 00 00 0f|"; content:"|00 00 00 00|"; endswith; reference:url,https://attack.mitre.org/techniques/T1040/; reference:url,https://attack.mitre.org/software/S0174; reference:url,https://github.com/SpiderLabs/Responder; metadata:created_at 2024_01_06, updated_at 2026_05_26, signature_severity Major, attack_target Client_Endpoint, affected_product Windows_XP_Vista_7_8_10_11_Server_32_64_Bit, mitre_tactic_id TA0006, mitre_tactic_name Credential_Access, mitre_technique_id T1040, mitre_technique_name Network_Sniffing; sid:3301112; rev:11; classtype:credential-theft;)
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