Cobalt Stike Beacon Detected – 141[.]164[.]55[.]28:8443

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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 2021-11-10T14:56:11.150622

Cobalt Strike
Cobalt Strike

General Information

1379565605
Cloud ProviderVultr
Cloud RegionN/A
ServiceN/A
Domainsvultr[.]com
Hostnames141[.]164[.]55[.]28[.]vultr[.]com
HTTP Host141[.]164[.]55[.]28
ISPThe Constant Company, LLC
ORGThe Constant Company, 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)Seoul
LOCATION (COUNTRY CODE)KR
LOCATION (COUNTRY NAME)Korea, Republic of
LOCATION (LATITUDE)37.566
LOCATION (LONGITUDE)126.9784
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)f8624c743762edee7990386fdfe04c49683b1dd2
SSL ISSUED20210904021000Z
SSL EXPIRES20211203021000Z
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.clientAccept: */*, Host: www[.]amazon[.]com, session-token=, skin=noskin;, csm-hit=s-24KU11BB82RZSYGJ3BDK|1419899012996, Cookie
http-post.clientAccept: */*, Content-Type: text/xml, X-Requested-With: XMLHttpRequest, Host: www[.]amazon[.]com, sz=160×600, oe=oe=ISO-8859-1;, sn, s=3717, dc_ref=http%3A%2F%2Fwww[.]amazon[.]com
DNS Beacon MaxDNS255
DNS Beacon IdleN/A
Beacon JitterN/A
dns-beacon.strategy_fail_secondsN/A
dns-beacon.strategy_rotate_secondsN/A
dns-beacon.strategy_fail_xN/A
HTTP GET URIkjdhcfv8qvy3v8374twkrht89209o34u398q3gji38493[.]flash-china[.]me,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books
HTTP POST URI/N4215/adj/amzn.us.sr.aps
Max GET Size1048576
Port8443
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)
sleeptime50000
useragent_headerMozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
uses_cookies1
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
WatermarkN/A
Beacon Stage Cleanup1
Available for Amazon Prime