Detection rules › Sigma
Registry Modification for OCI DLL Redirection
Detects registry modifications related to 'OracleOciLib' and 'OracleOciLibPath' under 'MSDTC' settings. Threat actors may modify these registry keys to redirect the loading of 'oci.dll' to a malicious DLL, facilitating phantom DLL hijacking via the MSDTC service.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1112 Modify Registry, T1574.001 Hijack Execution Flow: DLL |
| Privilege Escalation | T1574.001 Hijack Execution Flow: DLL |
| Defense Evasion | T1112 Modify Registry, T1574.001 Hijack Execution Flow: DLL |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 13 | RegistryEvent (Value Set) |
Stages and Predicates
Stage 1: selection_ocilib
TargetObject|endswith: '\SOFTWARE\Microsoft\MSDTC\MTxOCI\OracleOciLib'
Stage 2: not filter_main_ocilib_file
Details|contains: oci.dll
Stage 3: selection_ocilibpath
TargetObject|endswith: '\SOFTWARE\Microsoft\MSDTC\MTxOCI\OracleOciLibPath'
Stage 4: not filter_main_ocilibpath
Details|contains: '%SystemRoot%\System32\'
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 |
|---|---|---|
Details | match |
|
TargetObject | ends_with |
|