Cobalt Stike Beacon Detected – 149[.]28[.]8[.]3:443

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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 2021-11-15T12:56:20.207298

Cobalt Strike
Cobalt Strike

General Information

146473198
Cloud Provider
Cloud Region
Service
Domainsvultr[.]com
Hostnames149[.]28[.]8[.]3[.]vultr[.]com
HTTP Host149[.]28[.]8[.]3
ISPThe Constant Company, LLC
ORGVultr Holdings, 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)Seattle
LOCATION (COUNTRY CODE)US
LOCATION (COUNTRY NAME)United States
LOCATION (LATITUDE)47.60621
LOCATION (LONGITUDE)-122.33207
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
TAGSself-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientAccept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*l;q=0[.]8, Referer: https://www[.]Google[.]com, Pragma: no-cache, Cache-Control: no-cache, [.]gif
http-post.clientContent-Type: application/octet-stream, Referer: https://www[.]Google[.]com, Pragma: no-cache, Cache-Control: no-cache, [.]png
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 URIb[.]pwn-t[.]tk,/image/,www[.]pwn-t[.]tk,/image/,a[.]pwn-t[.]tk,/image/,c[.]pwn-t[.]tk,/image/,d[.]pwn-t[.]tk,/image/,www[.]yang1144[.]tk,/image/
HTTP POST URI/email/
Max GET Size1398104
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)
sleeptime10000
useragent_headerMozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/5.0)
uses_cookiesN/A
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark1234567890
Beacon Stage CleanupN/A
Available for Amazon Prime