Renamed PingCastle Binary Execution

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

Detects the execution of a renamed "PingCastle" binary based on the PE metadata fields.

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059` Command and Scripting Interpreter
Defense Evasion	`T1202` Indirect Command Execution

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `selection`

or:
CommandLine|contains: --healthcheck
CommandLine|contains: '--level Full'
CommandLine|contains: --healthcheck
CommandLine|contains: '--server '
CommandLine|contains: --no-enum-limit
CommandLine|contains: '--scanner aclcheck'
CommandLine|contains: '--scanner antivirus'
CommandLine|contains: '--scanner computerversion'
CommandLine|contains: '--scanner foreignusers'
CommandLine|contains: '--scanner laps_bitlocker'
CommandLine|contains: '--scanner localadmin'
CommandLine|contains: '--scanner nullsession'
CommandLine|contains: '--scanner nullsession-trust'
CommandLine|contains: '--scanner oxidbindings'
CommandLine|contains: '--scanner remote'
CommandLine|contains: '--scanner share'
CommandLine|contains: '--scanner smb'
CommandLine|contains: '--scanner smb3querynetwork'
CommandLine|contains: '--scanner spooler'
CommandLine|contains: '--scanner startup'
CommandLine|contains: '--scanner zerologon'
OriginalFileName: PingCastle.exe
OriginalFileName: PingCastleCloud.exe
OriginalFileName: PingCastleReporting.exe

Stage 2: `not 1 of filter_main_img`

or:
Image|endswith: '\PingCastle.exe'
Image|endswith: '\PingCastleCloud.exe'
Image|endswith: '\PingCastleReporting.exe'

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	`--healthcheck` corpus 3 (sigma 3) `--level Full` corpus 3 (sigma 3) `--no-enum-limit` corpus 3 (sigma 3) `--scanner aclcheck` corpus 3 (sigma 3) `--scanner antivirus` corpus 3 (sigma 3) `--scanner computerversion` corpus 3 (sigma 3) `--scanner foreignusers` corpus 3 (sigma 3) `--scanner laps_bitlocker` corpus 3 (sigma 3) `--scanner localadmin` corpus 3 (sigma 3) `--scanner nullsession` corpus 3 (sigma 3) `--scanner nullsession-trust` corpus 3 (sigma 3) `--scanner oxidbindings` corpus 3 (sigma 3) `--scanner remote` corpus 3 (sigma 3) `--scanner share` corpus 3 (sigma 3) `--scanner smb` corpus 3 (sigma 3) `--scanner smb3querynetwork` corpus 3 (sigma 3) `--scanner spooler` corpus 3 (sigma 3) `--scanner startup` corpus 3 (sigma 3) `--scanner zerologon` corpus 3 (sigma 3) `--server` corpus 3 (sigma 3)
`Image`	ends_with	`\PingCastle.exe` corpus 3 (sigma 3) `\PingCastleCloud.exe` `\PingCastleReporting.exe`
`OriginalFileName`	eq	`PingCastle.exe` corpus 3 (sigma 3) `PingCastleCloud.exe` `PingCastleReporting.exe`