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

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 2021-11-15T11:09:35.530736

General Information

1603455673

Cloud Provider	Tencent Cloud
Cloud Region	N/A
Service	N/A
Domains	N/A
Hostnames	N/A
HTTP Host	101[.]42[.]108[.]23
ISP	Shenzhen Tencent Computer Systems Company Limited
ORG	Tencent Cloud Computing (Beijing) 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	Apache
HTTP SITEMAP	N/A
HTTP SITEMAP HASH	N/A
HTTP TITLE	N/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 EXPIRED	true
SSL FINGERPRINT (SHA1)	f92ceb20dcbb07110287112c9e0a974cf597cabe
SSL ISSUED	20201218140040Z
SSL EXPIRES	20210318140040Z
SSL CYPHER	ECDHE-RSA-AES256-GCM-SHA384
SSL VERSION	TLSv1/SSLv3
SSL TRUST (REVOKED)	N/A
TAGS	cloud, self-signed

Cobalt Strike Beacon Information

Beacon Type	HTTPS
http-get.client	Accept: 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.client	Accept: 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 MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	37
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	src[.]baidu[.]cn[.]cdn[.]dnsv1[.]com,/jquery-3[.]3[.]1[.]min[.]js
HTTP POST URI	/jquery-3.3.2.min.js
Max GET Size	1403644
Port	443
post-ex.spawnto_x64	%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86	%windir%\syswow64\rundll32[.]exe
process-inject.startrwx	4
process-inject.userwx	32
process-inject.allocator	1
proxy.behavior	2 (Use IE settings)
sleeptime	1000
useragent_header	Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko
uses_cookies	1
process-inject.execute	ntdll:RtlUserThreadStart, CreateThread, NtQueueApcThread-s, CreateRemoteThread, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	1