Suspicious Service Installed

Severity: medium
Author: xknow (@xknow_infosec), xorxes (@xor_xes)
Source: upstream

Detects installation of NalDrv or PROCEXP152 services via registry-keys to non-system32 folders. Both services are used in the tool Ghost-In-The-Logs (https://github.com/bats3c/Ghost-In-The-Logs), which uses KDU (https://github.com/hfiref0x/KDU)

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1562.001` Impair Defenses: Disable or Modify Tools

Event coverage

Provider	Event ID	Title
Sysmon	13	RegistryEvent (Value Set)

Stages and Predicates

Stage 1: `selection`

TargetObject: ['HKLM\System\CurrentControlSet\Services\NalDrv\ImagePath', 'HKLM\System\CurrentControlSet\Services\PROCEXP152\ImagePath']

Stage 2: `not filter`

or:
Image|endswith: '\handle.exe'
Image|endswith: '\handle64.exe'
Image|endswith: '\procexp.exe'
Image|endswith: '\procexp64.exe'
Image|endswith: '\procmon.exe'
Image|endswith: '\procmon64.exe'
Details|contains: '\WINDOWS\system32\Drivers\PROCEXP152.SYS'

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	`\WINDOWS\system32\Drivers\PROCEXP152.SYS`
`Image`	ends_with	`\handle.exe` corpus 5 (sigma 5) `\handle64.exe` corpus 5 (sigma 5) `\procexp.exe` corpus 6 (sigma 6) `\procexp64.exe` corpus 6 (sigma 6) `\procmon.exe` corpus 2 (sigma 2) `\procmon64.exe` corpus 2 (sigma 2)
`TargetObject`	eq	`HKLM\System\CurrentControlSet\Services\NalDrv\ImagePath` `HKLM\System\CurrentControlSet\Services\PROCEXP152\ImagePath`