Cobalt Stike Beacon Detected – 34[.]209[.]21[.]11:443

Cobalt Strike Beacon Detection Alerts

The Information provided at the time of posting was detected as “Cobalt Strike”. Depending on when you are viewing this article, it may no longer be the case and could be determined as being a false positive. Please do your own additional validation. – RedPacket Security

TimeStamp 2021-11-17T19:48:58.686932

Cobalt Strike
Cobalt Strike

General Information

4.0747784933743545e+41
Cloud ProviderAmazon
Cloud Regionus-west-2
ServiceAMAZON
Domainsamazonaws[.]com
Hostnamesec2-34-209-21-11[.]us-west-2[.]compute[.]amazonaws[.]com
HTTP Host34[.]209[.]21[.]11
ISPAmazon.com, Inc.
ORGAmazon Technologies Inc.
OSN/A
HTTPN/A
HTTP HTML HASHN/A
HTTP LOCATION/
HTTP REDIRECTS
HTTP ROBOTSN/A
HTTP ROBOTS HASHN/A
HTTP SECURITY.TXTN/A
HTTP SECURITY.TXT HASHN/A
HTTP SERVERnginx-1.16.1
HTTP SITEMAPN/A
HTTP SITEMAP HASHN/A
HTTP TITLEN/A
LOCATION (AREA CODE)N/A
LOCATION (CITY)Boardman
LOCATION (COUNTRY CODE)US
LOCATION (COUNTRY NAME)United States
LOCATION (LATITUDE)45.83986
LOCATION (LONGITUDE)-119.70058
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)a7f533d62140cac34c69f3cdacfc58c9358c2a3e
SSL ISSUED20211101164742Z
SSL EXPIRES20220130164741Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGScloud


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientAccept: application/json, Host: api[.]thomas-jefferson[.]org, Referer: https://portal[.]thomas-jefferson[.]org/, Accept-Encoding: gzip, deflate, Authorization
http-post.clientContent-Type: application/json, Host: api[.]thomas-jefferson[.]org, Authorization, {“Type”:”Sync”,”Data”:”, “}
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon Jitter33
dns-beacon.strategy_fail_seconds-1
dns-beacon.strategy_rotate_seconds-1
dns-beacon.strategy_fail_x-1
HTTP GET URIapi[.]thomas-jefferson[.]org,/v1/session/keepalive
HTTP POST URI/v1/HealthMonitor/event
Max GET Size1398138
Port443
post-ex.spawnto_x64%windir%\sysnative\eventvwr[.]exe
post-ex.spawnto_x86%windir%\syswow64\eventvwr[.]exe
process-inject.startrwx4
process-inject.userwx32
process-inject.allocatorN/A
proxy.behavior2 (Use IE settings)
sleeptime87315
useragent_headerMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Firefox/58.0.1
uses_cookiesN/A
process-inject.executentdll:RtlUserThreadStart, CreateThread, NtQueueApcThread-s, CreateRemoteThread, RtlCreateUserThread
Watermark36310679
Beacon Stage Cleanup1