Cobalt Stike Beacon Detected – 104[.]199[.]57[.]39:443

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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 2021-11-15T00:55:40.217483

Cobalt Strike
Cobalt Strike

General Information

146473198
Cloud ProviderGoogle
Cloud Regioneurope-west1
ServiceN/A
Domainsgoogleusercontent[.]com
Hostnames39[.]57[.]199[.]104[.]bc[.]googleusercontent[.]com
HTTP Host104[.]199[.]57[.]39
ISPGoogle LLC
ORGGoogle LLC
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 SERVERN/A
HTTP SITEMAPN/A
HTTP SITEMAP HASHN/A
HTTP TITLEN/A
LOCATION (AREA CODE)N/A
LOCATION (CITY)Brussels
LOCATION (COUNTRY CODE)BE
LOCATION (COUNTRY NAME)Belgium
LOCATION (LATITUDE)50.85045
LOCATION (LONGITUDE)4.34878
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)6ece5ece4192683d2d84e25b0ba7e04f9cb7eb7c
SSL ISSUED20150520182624Z
SSL EXPIRES20250517182624Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGScloud, self-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientCookie
http-post.clientContent-Type: application/octet-stream, id
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon JitterN/A
dns-beacon.strategy_fail_seconds-1
dns-beacon.strategy_rotate_seconds-1
dns-beacon.strategy_fail_x-1
HTTP GET URI104[.]199[.]57[.]39,/en_US/all[.]js
HTTP POST URI/submit.php
Max GET Size1048576
Port443
post-ex.spawnto_x64%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86%windir%\syswow64\rundll32[.]exe
process-inject.startrwx64
process-inject.userwx64
process-inject.allocatorN/A
proxy.behavior2 (Use IE settings)
sleeptime60000
useragent_headerMozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; MASP)
uses_cookies1
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark1580103824
Beacon Stage CleanupN/A
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