Cobalt Stike Beacon Detected – 123[.]57[.]73[.]247:443

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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 2021-11-11T17:02:06.466992

Cobalt Strike
Cobalt Strike

General Information

744743870
Cloud Provider
Cloud Region
Service
DomainsN/A
HostnamesN/A
HTTP Host123[.]57[.]73[.]247
ISPHangzhou Alibaba Advertising Co.,Ltd.
ORGAliyun Computing 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)Beijing
LOCATION (COUNTRY CODE)CN
LOCATION (COUNTRY NAME)China
LOCATION (LATITUDE)39.9075
LOCATION (LONGITUDE)116.39723
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)377e950c0abe6e194ced031fdd0ce02a477940b1
SSL ISSUED20210221052005Z
SSL EXPIRES20220221052005Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGSself-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientuser=, Cookie
http-post.clientAccept: text/plain, Accept-Language: en-us, Accept-Encoding: text/plain, Content-Type: application/x-www-form-urltrytryd, id, &op=1&id=vxeykS&ui=Josh @ PC&wv=11&gr=backoff&bv=1[.]55&data=
DNS Beacon MaxDNS235
DNS Beacon Idle134743044
Beacon Jitter10
dns-beacon.strategy_fail_secondsN/A
dns-beacon.strategy_rotate_secondsN/A
dns-beacon.strategy_fail_xN/A
HTTP GET URI123[.]57[.]73[.]247,/updates
HTTP POST URI/hello/flash.php
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)
sleeptime4000
useragent_headerMozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Firefox/24.0
uses_cookies1
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
WatermarkN/A
Beacon Stage CleanupN/A
Available for Amazon Prime