Detection rules › Splunk
Windows Increase in Group or Object Modification Activity
This analytic detects an increase in modifications to AD groups or objects. Frequent changes to AD groups or objects can indicate potential security risks, such as unauthorized access attempts, impairing defences or establishing persistence. By monitoring AD logs for unusual modification patterns, this detection helps identify suspicious behavior that could compromise the integrity and security of the AD environment.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1098 Account Manipulation |
| Privilege Escalation | T1098 Account Manipulation |
| Defense Evasion | T1562 Impair Defenses |
Event coverage
Stages and Predicates
Stage 1: search
search EventCode IN (4670, 4727, 4731, 4734, 4735, 4764)
Stage 2: bucket
bucket span=5m _time
Stage 3: stats
stats BY _time, src_user, signature, status
Stage 4: eventstats
eventstats avg(objectCount) AS comp_avg BY src_user, signature
Stage 5: eval
eval ... using (comp_avg, comp_std)
Stage 6: eval
eval ... using (objectCount, upperBound)
Stage 7: search
search isOutlier=1
Stage 8: search
search `macro`
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
EventCode | in |
|
isOutlier | eq |
|
Neighbors
Often fire together
Rules that target events appearing in the same incident timelines. They pattern-match on adjacent steps of the same TTP, so an alert from one is often paired with alerts from these. Useful for triage context and for assembling chained-detection rules.
Share event IDs (chain-detection candidates)
Rules that observe the same Windows event-ID pairs as this one. If you're authoring a multi-stage / sequence rule that spans these events, these are the existing detections that already cover one or both endpoints.