HackTool - CrackMapExec File Indicators

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

Detects file creation events with filename patterns used by CrackMapExec.

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1003.001` OS Credential Dumping: LSASS Memory

Event coverage

Provider	Event ID	Title
Sysmon	11	FileCreate

Stages and Predicates

Stage 1: `selection_path`

TargetFilename|startswith: 'C:\Windows\Temp\'

Stage 2: `1 of selection_names_str`

or:
TargetFilename|endswith: '\msol.ps1'
TargetFilename|endswith: '\temp.ps1'

Stage 3: `1 of selection_names_re`

or:
TargetFilename|re: '\\[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.txt$'
TargetFilename|re: '\\[a-zA-Z]{8}\.tmp$'

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
`TargetFilename`	ends_with	`\msol.ps1` `\temp.ps1`
`TargetFilename`	regex_match	`\\[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.txt$` `\\[a-zA-Z]{8}\.tmp$`
`TargetFilename`	starts_with	`C:\Windows\Temp\` corpus 4 (sigma 4)