Detection rules › Sigma
Suspicious Child Process Of BgInfo.EXE
Detects suspicious child processes of "BgInfo.exe" which could be a sign of potential abuse of the binary to proxy execution via external VBScript
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.005 Command and Scripting Interpreter: Visual Basic |
| Defense Evasion | T1202 Indirect Command Execution, T1218 System Binary Proxy Execution |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: all of selection_parent
or:
ParentImage|endswith: '\bginfo.exe'
ParentImage|endswith: '\bginfo64.exe'
Stage 2: all of selection_child
or:
Image|endswith: '\calc.exe'
Image|endswith: '\cmd.exe'
Image|endswith: '\cscript.exe'
Image|endswith: '\mshta.exe'
Image|endswith: '\notepad.exe'
Image|endswith: '\powershell.exe'
Image|endswith: '\pwsh.exe'
Image|endswith: '\wscript.exe'
Image|contains: ':\PerfLogs\'
Image|contains: ':\Temp\'
Image|contains: ':\Users\Public\'
Image|contains: ':\Windows\Temp\'
Image|contains: '\AppData\Local\'
Image|contains: '\AppData\Roaming\'
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 |
|---|---|---|
Image | ends_with |
|
Image | match |
|
ParentImage | ends_with |
|