Emerging Threathightest
Small Sieve Malware CommandLine Indicator
Detects specific command line argument being passed to a binary as seen being used by the malware Small Sieve.
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Launch
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|endswith: '.exe Platypus'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Sub-techniques
Other
detection.emerging-threats
Rule Metadata
Rule ID
21117127-21c8-437a-ae03-4b51e5a8a088
Status
test
Level
high
Type
Emerging Threat
Created
Fri May 19
Path
rules-emerging-threats/2021/Malware/Small-Sieve/proc_creation_win_malware_small_sieve_cli_arg.yml
Raw Tags
attack.privilege-escalationattack.defense-evasionattack.persistenceattack.t1574.001detection.emerging-threats