Securing Truxton Services

If you must operate in a more "locked down" mode, FISMA for instance, you must change how Truxton's services run.

How Secure Truxton Services

To find out what the permissions are for a service, use the sc sdshow command:

sc sdshow Les
sc sdshow Truxton
sc sdshow TruxtonDatabase

On my machine, it produces this lovely string:

D:(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)

You can use the Powershell ConvertFrom-SddlString command to convert it to something humanly readable.

ConvertFrom-SddlString -Sddl "D:(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)" | Foreach-Object {$_.DiscretionaryAcl}

A better way to begin to understand it is by adding spaces and line breaks:

D:
(A;;CC DC LC SW RP WP DT LO CR SD RC WD WO;;;BU)
(A;;CC LC SW RP WP DT LO CR RC;;;SY)
(A;;CC DC LC SW RP WP DT LO CR SD RC WD WO;;;BA)
(A;;CC LC SW LO CR RC;;;IU)
(A;;CC LC SW LO CR RC;;;SU)

The most common permissions to alter are DC, WD and WO.

Code	Meaning
DC	Change Configuration (aka Write Data)
WD	Change Permissions (aka Write Descriptor)
WO	Take Ownership (aka Write Owner)

It looks like the BuiltIn Users is the culprit. Let's change the BU part to get rid of those:

(A;;CC LC SW RP WP DT LO CR SD RC;;;BU)

Start a command prompt as Administrator then:

sc sdset Les D:(A;;CCLCSWRPWPDTLOCRSDRC;;;BU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)
sc sdset Truxton D:(A;;CCLCSWRPWPDTLOCRSDRC;;;BU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)
sc sdset TruxtonDatabase D:(A;;CCLCSWRPWPDTLOCRSDRC;;;BU)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)

External links

• Microsoft Guidlines
• How to Read SDDL