[Rule Tuning] Direct Outbound SMB Connection #3400
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w0rk3r
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Rule: Tuning
w0rk3r
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brokensound77,
DefSecSentinel,
Samirbous,
Aegrah and
terrancedejesus
Samirbous
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Jan 23, 2024
terrancedejesus
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Jan 23, 2024
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Tuning looks good.
- We removed the compatibility with the Windows integration.
- We removed the index searches for Winlogbeat and Windows integration; this should reduce the doc counts and searches in general, hopefully increasing performance of the rule at execution time
- After conversation with @w0rk3r and @Samirbous, the goal of
not (process.code_signature.trusted == true and not process.code_signature.subject_name : "Microsoft *")is to capture unsigned executables + MS LOLbins (inherently signed).
The approach is to capture all potentially signed MS LOLbins sending direct outbound SMB connections. If this is too broad, performance-wise, we can revisit in an attempt to tune further.
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
protectionsmachine
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* [Rule Tuning] Direct Outbound SMB Connection * Update lateral_movement_direct_outbound_smb_connection.toml (cherry picked from commit e33389b)
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