Emerging Threatmediumtest
Potential APT-C-12 BlueMushroom DLL Load Activity Via Regsvr32
Detects potential BlueMushroom DLL loading activity via regsvr32 from AppData Local
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Launch
Florian Roth (Nextron Systems), Tim Shelton, Nasreddine Bencherchali (Nextron Systems)Created Wed Oct 02Updated Wed Mar 29bd70d3f8-e60e-4d25-89f0-0b5a9cff20e02019
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:
- 'regsvr32'
- '\AppData\Local\'
- '.dll'
- ',DllEntry'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Rule Metadata
Rule ID
bd70d3f8-e60e-4d25-89f0-0b5a9cff20e0
Status
test
Level
medium
Type
Emerging Threat
Created
Wed Oct 02
Modified
Wed Mar 29
Path
rules-emerging-threats/2019/TA/APC-C-12/proc_creation_win_apt_aptc12_bluemushroom.yml
Raw Tags
attack.defense-evasionattack.t1218.010detection.emerging-threats