Detection rules › Sigma
Potential JLI.dll Side-Loading
Detects potential DLL side-loading of jli.dll. JLI.dll has been observed being side-loaded by Java processes by various threat actors, including APT41, XWorm, and others in order to load malicious payloads in context of legitimate Java processes.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1574.001 Hijack Execution Flow: DLL |
| Privilege Escalation | T1574.001 Hijack Execution Flow: DLL |
| Defense Evasion | T1574.001 Hijack Execution Flow: DLL |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 7 | Image loaded |
Stages and Predicates
Stage 1: selection
ImageLoaded|endswith: '\jli.dll'
Stage 2: not 1 of filter_main_legitimate_install_paths
or:
ImageLoaded|startswith: 'C:\Program Files (x86)\'
ImageLoaded|startswith: 'C:\Program Files\'
Description: 'OpenJDK Platform binary'
OriginalFileName: jli.dll
Product|startswith: 'OpenJDK Platform'
Signed: true
Stage 3: not 1 of filter_optional_eclipse
ImageLoaded|startswith: 'C:\eclipse\plugins\'
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 |
|---|---|---|
Description | eq |
|
ImageLoaded | ends_with |
|
ImageLoaded | starts_with |
|
OriginalFileName | eq |
|
Product | starts_with |
|
Signed | eq |
|