Aruba Network Service Potential DLL Sideloading

Severity: high
Author: Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects potential DLL sideloading activity via the Aruba Networks Virtual Intranet Access "arubanetsvc.exe" process using DLL Search Order Hijacking

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`

or:
ImageLoaded|endswith: '\cryptbase.dll'
ImageLoaded|endswith: '\cryptsp.dll'
ImageLoaded|endswith: '\dbgcore.dll'
ImageLoaded|endswith: '\dbghelp.dll'
ImageLoaded|endswith: '\dpapi.dll'
ImageLoaded|endswith: '\iphlpapi.dll'
ImageLoaded|endswith: '\msvcp100.dll'
ImageLoaded|endswith: '\msvcr100.dll'
ImageLoaded|endswith: '\profapi.dll'
ImageLoaded|endswith: '\sspicli.dll'
ImageLoaded|endswith: '\version.dll'
ImageLoaded|endswith: '\wininet.dll'
ImageLoaded|endswith: '\winsta.dll'
ImageLoaded|endswith: '\wldp.dll'
ImageLoaded|endswith: '\wtsapi32.dll'
Image|endswith: '\arubanetsvc.exe'

Stage 2: `not filter`

or:
ImageLoaded|startswith: 'C:\Windows\SysWOW64\'
ImageLoaded|startswith: 'C:\Windows\System32\'
ImageLoaded|startswith: 'C:\Windows\WinSxS\'

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	`\arubanetsvc.exe`
`ImageLoaded`	ends_with	`\cryptbase.dll` corpus 2 (sigma 2) `\cryptsp.dll` corpus 2 (sigma 2) `\dbgcore.dll` corpus 4 (sigma 4) `\dbghelp.dll` corpus 4 (sigma 4) `\dpapi.dll` `\iphlpapi.dll` corpus 2 (sigma 2) `\msvcp100.dll` `\msvcr100.dll` `\profapi.dll` corpus 2 (sigma 2) `\sspicli.dll` corpus 2 (sigma 2) `\version.dll` corpus 2 (sigma 2) `\wininet.dll` corpus 2 (sigma 2) `\winsta.dll` corpus 2 (sigma 2) `\wldp.dll` corpus 2 (sigma 2) `\wtsapi32.dll` corpus 2 (sigma 2)
`ImageLoaded`	starts_with	`C:\Windows\SysWOW64\` corpus 8 (sigma 8) `C:\Windows\System32\` corpus 8 (sigma 8) `C:\Windows\WinSxS\` corpus 9 (sigma 9)