Service Binary in Suspicious Folder

Severity: high
Author: Florian Roth (Nextron Systems), frack113
Source: upstream

Detect the creation of a service with a service binary located in a suspicious directory

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1112` Modify Registry
Defense Evasion	`T1112` Modify Registry

Event coverage

Provider	Event ID	Title
Sysmon	13	RegistryEvent (Value Set)

Stages and Predicates

Stage 1: `1 of selection_service_start`

Details: ['DWORD (0x00000000)', 'DWORD (0x00000001)', 'DWORD (0x00000002)']
or:
Image|contains: '\ADMIN$\'
Image|contains: '\Perflogs\'
Image|contains: '\Temp\'
Image|contains: '\Users\Public\'
TargetObject|endswith: '\Start'
TargetObject|startswith: 'HKLM\System\CurrentControlSet\Services\'

Stage 2: `1 of selection_service_imagepath`

or:
Details|contains: '\ADMIN$\'
Details|contains: '\Perflogs\'
Details|contains: '\Temp\'
Details|contains: '\Users\Public\'
TargetObject|endswith: '\ImagePath'
TargetObject|startswith: 'HKLM\System\CurrentControlSet\Services\'

Stage 3: `not 1 of filter_optional_*`

or:
Details|endswith: '\AppData\Local\Temp\MBAMInstallerService.exe"'
Image: 'C:\Windows\system32\services.exe'
TargetObject|endswith: '\CurrentControlSet\Services\MBAMInstallerService\ImagePath'
Image|contains: '\Common Files\'
Image|contains: '\Temp\'

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`	ends_with	`\AppData\Local\Temp\MBAMInstallerService.exe"`
`Details`	eq	`DWORD (0x00000000)` corpus 38 (sigma 38) `DWORD (0x00000001)` corpus 37 (sigma 37) `DWORD (0x00000002)` corpus 9 (sigma 9)
`Details`	match	`\ADMIN$\` `\Perflogs\` `\Temp\` `\Users\Public\` corpus 5 (sigma 5)
`Image`	eq	`C:\Windows\system32\services.exe`
`Image`	match	`\ADMIN$\` `\Common Files\` `\Perflogs\` `\Temp\` corpus 5 (sigma 5) `\Users\Public\` corpus 8 (sigma 8)
`TargetObject`	ends_with	`\CurrentControlSet\Services\MBAMInstallerService\ImagePath` `\ImagePath` corpus 2 (sigma 2) `\Start` corpus 2 (sigma 2)
`TargetObject`	starts_with	`HKLM\System\CurrentControlSet\Services\`