Cobalt Stike Beacon Detected – 47[.]99[.]63[.]88:443

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 2021-11-12T16:04:00.731411

General Information

1017529254

Cloud Provider
Cloud Region
Service
Domains	N/A
Hostnames	N/A
HTTP Host	47[.]99[.]63[.]88
ISP	Hangzhou Alibaba Advertising Co.,Ltd.
ORG	Aliyun Computing Co., LTD
OS	N/A
HTTP	N/A
HTTP HTML HASH	N/A
HTTP LOCATION	/
HTTP REDIRECTS
HTTP ROBOTS	N/A
HTTP ROBOTS HASH	N/A
HTTP SECURITY.TXT	N/A
HTTP SECURITY.TXT HASH	N/A
HTTP SERVER	N/A
HTTP SITEMAP	N/A
HTTP SITEMAP HASH	N/A
HTTP TITLE	N/A
LOCATION (AREA CODE)	N/A
LOCATION (CITY)	Hangzhou
LOCATION (COUNTRY CODE)	CN
LOCATION (COUNTRY NAME)	China
LOCATION (LATITUDE)	30.29365
LOCATION (LONGITUDE)	120.16142
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	79197a29dc060fe1930126094a610f777f871559
SSL ISSUED	20211111032630Z
SSL EXPIRES	20220209032630Z
SSL CYPHER	ECDHE-RSA-AES256-GCM-SHA384
SSL VERSION	TLSv1/SSLv3
SSL TRUST (REVOKED)	N/A
TAGS	self-signed

Cobalt Strike Beacon Information

Beacon Type	HTTPS
http-get.client	Accept: */*, Referer: https://www[.]dingtalk[.]com/, isg=, dd_home_locale=zh-cn;, ctoken=FfetjzJwSDvhyRWybnFbQpra;, cna=0cW1uPMmsC4JUASpA3JXF4Sz;, ;l=uPzaNbMiOCjM2qQWeBCnGVh6q7alu0CB5RQcW6slrzaP_TpIRvm55BOf_HmnEJkaWeYBcHKeR37q3LI1Sa2K5yJe7j86Bnxvt;, Cookie
http-post.client	Accept: */*, Content-Type: text/xml, X-Requested-With: XMLHttpRequest, Referer: https://www[.]dingtalk[.]com/, Content-Type: application/x-www-form-urlencoded; charset=utf-8, ALI-CDN-DATA=, Cookie
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	15
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	192[.]168[.]100[.]170,/cdnjs/jquery/1[.]8[.]3/jquery[.]min[.]js
HTTP POST URI	/cdnjs/jquery/1.8.1/jquery.js
Max GET Size	1398156
Port	6443
post-ex.spawnto_x64	%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86	%windir%\syswow64\rundll32[.]exe
process-inject.startrwx	64
process-inject.userwx	64
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	5000
useragent_header	Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
uses_cookies	1
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	N/A