Cobalt Stike Beacon Detected – 185[.]184[.]223[.]173:443

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 2021-11-13T00:18:28.478537

Cobalt Strike
Cobalt Strike

General Information

2.0895260942228733e+37
Cloud Provider
Cloud Region
Service
DomainsN/A
HostnamesN/A
HTTP Host185[.]184[.]223[.]173
ISPxTom
ORGxTom
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)Osaka
LOCATION (COUNTRY CODE)JP
LOCATION (COUNTRY NAME)Japan
LOCATION (LATITUDE)34.69374
LOCATION (LONGITUDE)135.50218
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDtrue
SSL FINGERPRINT (SHA1)d2553022ce43fe3847a76f7b1baa41b81fb92ecd
SSL ISSUED20200821000000Z
SSL EXPIRES20210821120000Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGS


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientAccept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Host: www[.]mycloudup[.]com, Referer: http://www[.]mycloudup[.]com/, Accept-Encoding: gzip, deflate, __cfduid=, Cookie
http-post.clientAccept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Host: www[.]mycloudup[.]com, Referer: http://www[.]mycloudup[.]com/, Accept-Encoding: gzip, deflate, __cfduid
DNS Beacon MaxDNS255
DNS Beacon IdleN/A
Beacon Jitter26
dns-beacon.strategy_fail_secondsN/A
dns-beacon.strategy_rotate_secondsN/A
dns-beacon.strategy_fail_xN/A
HTTP GET URImycloudup[.]com,/js/static/jquery[.]min[.]js,www[.]mycloudup[.]com,/js/static/jquery[.]min[.]js
HTTP POST URI/js/jquery/jquery.min.js
Max GET Size1403644
Port443
post-ex.spawnto_x64%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86%windir%\syswow64\rundll32[.]exe
process-inject.startrwx64
process-inject.userwx32
process-inject.allocatorN/A
proxy.behavior2 (Use IE settings)
sleeptime34000
useragent_headerMozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; Zoom 3.6.0)
uses_cookiesN/A
process-inject.execute
WatermarkN/A
Beacon Stage CleanupN/A