Cobalt Stike Beacon Detected – 101[.]42[.]108[.]23:443

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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 2021-11-15T11:09:35.530736

Cobalt Strike
Cobalt Strike

General Information

1603455673
Cloud ProviderTencent Cloud
Cloud RegionN/A
ServiceN/A
DomainsN/A
HostnamesN/A
HTTP Host101[.]42[.]108[.]23
ISPShenzhen Tencent Computer Systems Company Limited
ORGTencent Cloud Computing (Beijing) 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 SERVERApache
HTTP SITEMAPN/A
HTTP SITEMAP HASHN/A
HTTP TITLEN/A
LOCATION (AREA CODE)N/A
LOCATION (CITY)Shanghai
LOCATION (COUNTRY CODE)CN
LOCATION (COUNTRY NAME)China
LOCATION (LATITUDE)31.22222
LOCATION (LONGITUDE)121.45806
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDtrue
SSL FINGERPRINT (SHA1)f92ceb20dcbb07110287112c9e0a974cf597cabe
SSL ISSUED20201218140040Z
SSL EXPIRES20210318140040Z
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: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Host: src[.]baidu[.]cn, Referer: http://code[.]jquery[.]com/, Accept-Encoding: gzip, deflate, __cfduid=, Cookie
http-post.clientAccept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Host: src[.]baidu[.]cn, Referer: http://code[.]jquery[.]com/, Accept-Encoding: gzip, deflate, __cfduid
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon Jitter37
dns-beacon.strategy_fail_secondsN/A
dns-beacon.strategy_rotate_secondsN/A
dns-beacon.strategy_fail_xN/A
HTTP GET URIsrc[.]baidu[.]cn[.]cdn[.]dnsv1[.]com,/jquery-3[.]3[.]1[.]min[.]js
HTTP POST URI/jquery-3.3.2.min.js
Max GET Size1403644
Port443
post-ex.spawnto_x64%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86%windir%\syswow64\rundll32[.]exe
process-inject.startrwx4
process-inject.userwx32
process-inject.allocator1
proxy.behavior2 (Use IE settings)
sleeptime1000
useragent_headerMozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
uses_cookies1
process-inject.executentdll:RtlUserThreadStart, CreateThread, NtQueueApcThread-s, CreateRemoteThread, RtlCreateUserThread
Watermark1359593325
Beacon Stage Cleanup1
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