Emerging Threathightest
MERCURY APT Activity
Detects suspicious command line patterns seen being used by MERCURY APT
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Launch
Florian Roth (Nextron Systems)Created Fri Aug 26Updated Fri Mar 10a62298a3-1fe0-422f-9a68-ffbcbc5a123d2022
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
CommandLine|contains|all:
- '-exec bypass -w 1 -enc'
- 'UwB0AGEAcgB0AC0ASgBvAGIAIAAtAFMAYwByAGkAcAB0AEIAbABvAGMAawAgAHsAKABzAGEAcABzACAAKAAiAHAA' # Start-Job -ScriptBlock
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Groups
Other
detection.emerging-threats
Rule Metadata
Rule ID
a62298a3-1fe0-422f-9a68-ffbcbc5a123d
Status
test
Level
high
Type
Emerging Threat
Created
Fri Aug 26
Modified
Fri Mar 10
Path
rules-emerging-threats/2022/TA/MERCURY/proc_creation_win_apt_mercury.yml
Raw Tags
attack.executionattack.t1059.001attack.g0069detection.emerging-threats