Cobalt Stike Beacon Detected – 18[.]252[.]55[.]155:443

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 2021-11-11T08:15:04.217936

General Information

4.098635348072526e+41

Cloud Provider	Amazon
Cloud Region	us-gov-east-1
Service	AMAZON
Domains	amazonaws[.]com
Hostnames	ec2-18-252-55-155[.]us-gov-east-1[.]compute[.]amazonaws[.]com
HTTP Host	18[.]252[.]55[.]155
ISP	Amazon.com, Inc.
ORG	Amazon Technologies Inc.
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)	Columbus
LOCATION (COUNTRY CODE)	US
LOCATION (COUNTRY NAME)	United States
LOCATION (LATITUDE)	39.96118
LOCATION (LONGITUDE)	-82.99879
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	true
SSL FINGERPRINT (SHA1)	d697a621576aa5a6d9a534dd3488e98fb6536828
SSL ISSUED	20210715192242Z
SSL EXPIRES	20211013192240Z
SSL CYPHER	ECDHE-RSA-AES256-GCM-SHA384
SSL VERSION	TLSv1/SSLv3
SSL TRUST (REVOKED)	N/A
TAGS	cloud

Cobalt Strike Beacon Information

Beacon Type	HTTPS
http-get.client	Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Accept-Language: en-US,en;q=0[.]5, Accept-Encoding: *, Cache-Control: no-store, no-transform, PREF=, Cookie
http-post.client	Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Accept-Language: en-US,en;q=0[.]5, Accept-Encoding: *, Cache-Control: no-store, no-transform, PREF=, Cookie
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	20
dns-beacon.strategy_fail_seconds	-1
dns-beacon.strategy_rotate_seconds	-1
dns-beacon.strategy_fail_x	-1
HTTP GET URI	cloud-office365[.]com,/safebrowse/dr/IrzUh12tRC1OhNknisAzj2nAjsLfKHGE7-0QOUqAJI7n2
HTTP POST URI	/safebrowse/dr/SYDdk27dBE8xrXtvwcKjs2yxtcVoUQsO4
Max GET Size	1398102
Port	443
post-ex.spawnto_x64	%windir%\sysnative\gpupdate[.]exe
post-ex.spawnto_x86	%windir%\syswow64\gpupdate[.]exe
process-inject.startrwx	64
process-inject.userwx	64
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	30000
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	1549831703
Beacon Stage Cleanup	1