HackTool - Covenant PowerShell Launcher

Severity: high
Author: Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.community
Source: upstream

Detects suspicious command lines used in Covenant luanchers

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.001` Command and Scripting Interpreter: PowerShell
Defense Evasion	`T1564.003` Hide Artifacts: Hidden Window

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `1 of selection_1`

or:
CommandLine|contains: -Command
CommandLine|contains: -EncodedCommand
CommandLine|contains: -Nop
CommandLine|contains: -Sta
CommandLine|contains: -Window
CommandLine|contains: Hidden

Stage 2: `1 of selection_2`

or:
CommandLine|contains: '-EncodedCommand cwB2ACAAbwAgA'
CommandLine|contains: GruntHTTP
CommandLine|contains: 'mshta file.hta'
CommandLine|contains: 'sv o (New-Object IO.MemorySteam);sv d '

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	`-Command` `-EncodedCommand` `-EncodedCommand cwB2ACAAbwAgA` `-Nop` `-Sta` `-Window` `GruntHTTP` `Hidden` `mshta file.hta` `sv o (New-Object IO.MemorySteam);sv d`