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All challenges · process_access · T1003.001

Access to LSASS memory

lsass.exe holds the credentials of logged-on users, so reading its memory is a common way to steal them. Five recordings show it: two in-memory credential dumps run from PowerShell, a dump through comsvcs.dll MiniDump, a tool that dumps through direct system calls, and a dump created from Task Manager. Many legitimate programs open lsass.exe too: services, installers, update agents. Find the accesses that belong to the five dumps.

Hint 1

GrantedAccess is the access mask the process asked for. Compare the masks of the dumps with those of the installers and update agents in the data.

Hint 2

CallTrace lists the modules on the stack when the access happened. UNKNOWN means code that does not belong to a loaded module.

How to defend against LSASS credential dumping

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Events

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