ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)

7.0.35.0SID: 2033315Rev: 2Enabled1 views
Sourceet/open
Fileemerging-user_agents.rules
CreatedJuly 12, 2021
UpdatedMarch 25, 2024
Classificationbad-unknown
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Observed Malicious User-Agent (Brute Force Attacks)"; flow:established,to_server; http.user_agent; bsize:71; content:"Microsoft|20|Office/14.0|20|(Windows|20|NT|20|6.1|3b 20|Microsoft|20|Outlook|20|14.0.7162|3b 20|Pro"; reference:url,media.defense.gov/2021/Jul/01/2002753896/-1/-1/1/CSA_GRU_GLOBAL_BRUTE_FORCE_CAMPAIGN_UOO158036-21.PDF; classtype:bad-unknown; sid:2033315; rev:2; metadata:created_at 2021_07_12, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_25;)

References

urlmedia.defense.gov/2021/Jul/01/2002753896/-1/-1/1/CSA_GRU_GLOBAL_BRUTE_FORCE_CAMPAIGN_UOO158036-21.PDF

Metadata

created at2021_07_12
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_25

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