Emerging Threathightest
DEWMODE Webshell Access
Detects access to DEWMODE webshell as described in FIREEYE report
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Florian Roth (Nextron Systems)Created Mon Feb 22Updated Mon Jan 02fdf96c90-42d5-4406-8a9c-14a2c9a016b52021
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
Web Server Log
CategoryWeb Server Log← raw: webserver
HTTP access logs from web servers capturing request paths, methods, and status codes.
Detection Logic
Detection Logic2 selectors
detection:
selection1:
cs-uri-query|contains|all:
- '?dwn='
- '&fn='
- '.html?'
selection2:
cs-uri-query|contains|all:
- '&dwn='
- '?fn='
- '.html?'
condition: 1 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
fdf96c90-42d5-4406-8a9c-14a2c9a016b5
Status
test
Level
high
Type
Emerging Threat
Created
Mon Feb 22
Modified
Mon Jan 02
Path
rules-emerging-threats/2021/TA/UNC2546/web_unc2546_dewmode_php_webshell.yml
Raw Tags
attack.persistenceattack.t1505.003detection.emerging-threats