CmdID

CmdID / Rules / Windows

New Virtual Smart Card Created Via TpmVscMgr.EXE

A Sigma rule for process creation on Windows, by Nasreddine Bencherchali (Nextron Systems).

medium 2 programs it names 3 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection_cli:
    CommandLine|contains: 'create'
  selection_img:
    Image|endswith: '\tpmvscmgr.exe'
    OriginalFileName: 'TpmVscMgr.exe'
  condition: all of selection_*

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Nasreddine Bencherchali (Nextron Systems), under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

Command lines that trip it

everyday examples from tldr-pages, CC BY 4.0, each read by CmdID

To create a virtual smart card that can be later managed by a smart card management tool launched from another computer, type on the page for tpmvscmgr

tpmvscmgr.exe create /name VirtualSmartCardForCorpAccess /AdminKey DEFAULT /PIN PROMPTIdentify

Alternatively, instead of using a default administrator key, you can create an administrator key at the command line. The following command shows how to create an administrator key. on the page for tpmvscmgr

tpmvscmgr.exe create /name VirtualSmartCardForCorpAccess /AdminKey PROMPT /PIN PROMPTIdentify

To create an unmanaged virtual smart card that can be used to enroll certificates, type on the page for tpmvscmgr

tpmvscmgr.exe create /name VirtualSmartCardForCorpAccess /AdminKey RANDOM /PIN PROMPT /generateIdentify

Programs and files it names

their pages here
tpmvscmgrtpmvscmgr.exe