Cobalt Stike Beacon Detected – 103[.]198[.]241[.]50:443

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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 2021-11-10T08:23:44.557189

Cobalt Strike
Cobalt Strike

General Information

1712976987
Cloud Provider
Cloud Region
Service
DomainsN/A
HostnamesN/A
HTTP Host103[.]198[.]241[.]50
ISPEnjoyvc Cloud Group Limited.
ORGShanghai Kuanhui Tech. Co.,ltd
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)Tokyo
LOCATION (COUNTRY CODE)JP
LOCATION (COUNTRY NAME)Japan
LOCATION (LATITUDE)35.6895
LOCATION (LONGITUDE)139.69171
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)a9ceeae276658a44500a2050b7e06f3634b3b7c0
SSL ISSUED20211021014310Z
SSL EXPIRES20221021014310Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGSself-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientmanifest=wac, Host: onedrive[.]live[.]com, Accept: text/html,application/xml;*/*;, Accept-Encoding: gzip, deflate, E=P:, =:PFzM9cj, Cookie
http-post.clientHost: onedrive[.]live[.]com, Accept: text/html,application/xml;*/*;, Accept-Encoding: gzip, deflate, ,, https://onedrive[.]live[.]com/about[.]html?s=, Referer
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon Jitter18
dns-beacon.strategy_fail_secondsN/A
dns-beacon.strategy_rotate_secondsN/A
dns-beacon.strategy_fail_xN/A
HTTP GET URIwww[.]balancehtyl[.]com,/preload
HTTP POST URI/about
Max GET Size2099361
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)
sleeptime1500
useragent_headerMozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 GTB6 (.NET CLR 3.5.30729)
uses_cookies1
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark8848
Beacon Stage Cleanup1
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