Copy .DMP/.DUMP Files From Remote Share Via Cmd.EXE

Severity: high
Author: Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects usage of the copy builtin cmd command to copy files with the ".dmp"/".dump" extension from a remote share

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\cmd.exe'
OriginalFileName: Cmd.Exe

Stage 2: `all of selection_cli`

or:
CommandLine|contains: .dmp
CommandLine|contains: .dump
CommandLine|contains: .hdmp
CommandLine|contains: ' \\\\'
CommandLine|contains: 'copy '

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
`CommandLine`	match	`\\\\` corpus 8 (sigma 8) `.dmp` corpus 6 (sigma 6) `.dump` corpus 3 (sigma 3) `.hdmp` corpus 3 (sigma 3) `copy` corpus 11 (sigma 11)
`Image`	ends_with	`\cmd.exe` corpus 92 (sigma 92)
`OriginalFileName`	eq	`Cmd.Exe` corpus 32 (sigma 30, splunk 2)