Cobalt Stike Beacon Detected – 188[.]165[.]148[.]241:443

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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 2021-11-10T08:42:09.403260

Cobalt Strike
Cobalt Strike

General Information

3886705681089841000
Cloud Provider
Cloud Region
Service
Domainslostbroker[.]com
Hostnamessiderd-fntil[.]lostbroker[.]com
HTTP Host188[.]165[.]148[.]241
ISPOVH SAS
ORGOVH SAS
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)Roubaix
LOCATION (COUNTRY CODE)FR
LOCATION (COUNTRY NAME)France
LOCATION (LATITUDE)50.69421
LOCATION (LONGITUDE)3.17456
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)18f5ec84e442826579b8aa422e82a39b1d2cc907
SSL ISSUED20211108091212Z
SSL EXPIRES20221108091212Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGSself-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clientOSID=, Cookie, Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Accept-Language: en-US,en;q=0[.]5, Accept-Encoding: gzip, deflate, DNT: 1
http-post.clientui=d3244c4707, hop=6928632, start=0, Content-Type: application/x-www-form-urlencoded;charset=utf-8, OSID=, Cookie
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon JitterN/A
dns-beacon.strategy_fail_seconds-1
dns-beacon.strategy_rotate_seconds-1
dns-beacon.strategy_fail_x-1
HTTP GET URI188[.]165[.]148[.]241,/_/scs/mail-static/_/js/
HTTP POST URI/mail/u/0/
Max GET Size1049376
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)
sleeptime60000
useragent_headerMozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB7.4; .NET4.0C)
uses_cookies1
process-inject.executeCreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark1580103824
Beacon Stage CleanupN/A
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