Detectionhightest
Chopper Webshell Process Pattern
Detects patterns found in process executions cause by China Chopper like tiny (ASPX) webshells
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Launch
Florian Roth (Nextron Systems), MSTI (query)Created Sat Oct 01fa3c117a-bc0d-416e-a31b-0c0e80653efbwindows
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 Logic2 selectors
detection:
selection_origin:
- Image|endswith: '\w3wp.exe'
- ParentImage|endswith: '\w3wp.exe'
selection_cmdline:
CommandLine|contains:
- '&ipconfig&echo'
- '&quser&echo'
- '&whoami&echo'
- '&c:&echo'
- '&cd&echo'
- '&dir&echo'
- '&echo [E]'
- '&echo [S]'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Rule Metadata
Rule ID
fa3c117a-bc0d-416e-a31b-0c0e80653efb
Status
test
Level
high
Type
Detection
Created
Sat Oct 01
Path
rules/windows/process_creation/proc_creation_win_webshell_chopper.yml
Raw Tags
attack.persistenceattack.discoveryattack.t1505.003attack.t1018attack.t1033attack.t1087