Detection rules › Sigma
ShimCache Flush
Detects actions that clear the local ShimCache and remove forensic evidence
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1112 Modify Registry |
| Defense Evasion | T1112 Modify Registry |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: selection1a
CommandLine|contains: apphelp.dll
CommandLine|contains: rundll32
Stage 2: selection1b
or:
CommandLine|contains: '#250'
CommandLine|contains: ShimFlushCache
Stage 3: selection2a
CommandLine|contains: kernel32.dll
CommandLine|contains: rundll32
Stage 4: selection2b
or:
CommandLine|contains: '#46'
CommandLine|contains: BaseFlushAppcompatCache
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 |
|---|---|---|
CommandLine | match |
|