규칙 요약: 웹 서버 보안 및 트로이 목마 탐지

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Eugene Tkachenko

커뮤니티 프로그램 리드

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5월 08, 2020 · 3 분 읽기

Sysmon 로그를 분석하는 더 일반적인 탐지 콘텐츠 외에도 기능이 있는 규칙에 계속 주목하고 있습니다. 오늘의 다이제스트에는 웹 서버 공격을 탐지하기 위한 두 개의 규칙, Outlaw 해킹 그룹 공격의 흔적을 발견하기 위한 규칙(1, 2)의 계속과 GRIFFON 백도어와 Qulab 트로이 목마를 발견할 수 있는 탐지 콘텐츠가 있습니다.

의심스러운 사용자 에이전트 패턴(via web) SOC Prime 팀에 의해

https://tdm.socprime.com/tdm/info/sPx0vvd77u3g/GuZ7OnEBv8lhbg_iHiB9/?p=1

이 규칙은 웹 로그에서 의심스러운 사용자 에이전트를 찾아 기본 설정이 되어 있는 웹 애플리케이션 스캐너나 공격 도구를 탐지하는 데 도움이 됩니다.

가능한 OS 명령어 삽입 패턴(via web) SOC Prime 팀에 의해

https://tdm.socprime.com/tdm/info/NCkwfXD408mF/_QlaxnEBAq_xcQY4Ne4e/?p=1

이 규칙은 악성 봇보다 훨씬 더 위협적인 위협으로부터 웹 서버를 보호하는 데 도움이 됩니다. 이를 통해 웹 서버에서 임의로 운영 체제 명령을 실행할 수 있는 쉘 삽입을 탐지할 수 있습니다. 쉘 삽입은 호스팅 인프라의 다른 부분을 손상시키고 조직의 네트워크 내의 다른 시스템까지 횡적 이동을 초래할 수 있습니다.

Outlaw 해킹 그룹 행동 지표(via cmdline) SOC Prime 팀에 의해

https://tdm.socprime.com/tdm/info/O5ZiqqZ4DzqR/-CHjy3EBjwDfaYjK9Evp/?p=1

우리는 커뮤니티 시그마 규칙에 관한 게시물에서 이 그룹에 대해 자세히 썼습니다. Outlaw 해킹 그룹 행동 지표 규칙은 다른 규칙에서 감지되지 않는 악성 행동을 탐지하는 데 도움이 됩니다. 이 내용은 또한 더 많은 플랫폼에 번역되었습니다 범용 위협 사냥 시그마.

Qulab 트로이 목마 (Covid-19 악용) 아리엘 밀라휠 작성

https://tdm.socprime.com/tdm/info/OfeYx3G0RNhn/YiGwynEBjwDfaYjKfkqA/?p=1

아리엘의 새로운 규칙은 감염된 컴퓨터의 클립보드를 모니터하고 디지털 통화 거래와 관련된 정보를 교체하는 데 사용되는 Qulab 클리퍼 트로이 목마를 탐지하는 데 도움이 됩니다. 트로이 목마는 또한 공격받은 시스템에서 개인 데이터를 모으고 유출할 수 있습니다. Qulab 클리퍼는 해킹 포럼에서 배포되고 있으며, 연구자들은 COVID-19 대유행 중에 등장한 새로운 버전의 악성코드를 발견했습니다

FIN7의 백도어 “GRIFFON 아리엘 밀라휠 작성

https://tdm.socprime.com/tdm/info/BlYPRF42TjGl/Wgm3ynEBAq_xcQY4h_IZ/?p=1

The FIN7 그룹은 특별한 소개가 필요 없으며, 6년 넘게 전 세계 금융 기관을 공격해 왔으며, 그 지도자의 체포가 그룹의 해체로 이어지지 않았습니다. GRIFFON 자바스크립트 배포 백도어는 최근 공격에서 포착되었으며, 사이버 범죄자들은 활성 X 컨트롤을 악용하여 문서 내용이 활성화된 후 악성 매크로가 자동으로 실행되도록 합니다. 아리엘 밀라휠이 작성한 커뮤니티 위협 사냥 시그마 규칙은 해당 그룹이 사용하는 도구를 다운로드하고 정보를 수집하는 데 사용되는 GRIFFON 백도어의 특성을 포착합니다.

이 컬렉션의 규칙은 다음 플랫폼에 대한 번역을 포함하고 있습니다:

SIEM: Azure Sentinel, ArcSight, QRadar, Splunk, Graylog, Sumo Logic, ELK Stack, RSA NetWitness, Logpoint, Humio, RSA NetWitness

EDR: Windows Defender ATP, Carbon Black, CrowdStrike, Elastic Endpoint

NTA: 코어라이트

MITRE ATT&CK:

전술: 초기 접근, 실행, 지속성, 방어 회피

기술: 공개 웹 애플리케이션 익스플로잇 (T1190), 명령 줄 인터페이스 (T1059), 파일 및 디렉터리 권한 수정 (T1222), 숨겨진 파일 및 디렉터리 (T1158), 로컬 작업 예약 (T1168), 스크립팅 (T1064), 루트 인증서 설치 (T1130), 레지스트리 수정 (T1112)

위협 보상 프로그램에 참여하여 유용한 탐지 콘텐츠를 작성 및 게시하고, 다음 주에 당신의 규칙이 다이제스트에 나타나고 인터뷰가 우리 블로그에 게시될 수 있습니다.

프로그램에 대해 더 알아보기: https://my.socprime.com/en/tdm-developers

우리의 최고 개발자와의 인터뷰 읽기: https://socprime.com/en/tag/interview/

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Name	Descripiton
PHPSESSID	Preserves user session state across page requests. Cookie generated by applications based on the PHP language. This is a general purpose identifier used to maintain user session variables. It is normally a random generated number, how it is used can be specific to the site, but a good example is maintaining a logged-in status for a user between pages.
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sp_r	Used to store information about authenticated User.
sp_a	Used to store information about authenticated User.

Name	Descripiton
tuuid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
tuuid_last_update	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
um	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
umeh	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
na_sc_x	Used by the social sharing platform AddThis to keep a record of parts of the site that has been visited in order to recommend other parts of the site.
APID	Collects anonymous data related to the user's visits to the website.
IDSYNC	Collects anonymous data related to the user's visits to the website.
_cc_aud	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_cc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_dc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_id	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
dpm	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
acs	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
clid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
KRTBCOOKIE_#	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PUBMDCID	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PugT	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
ssi	Registers a unique ID that identifies a returning user's device. The ID is used for targeted ads.
_tmid	Registers a unique ID that identifies the user's device upon return visits. The ID is used to target ads in video clips.
wam-sync	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
wui	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
AFFICHE_W	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
B	Collects anonymous data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The registered data is used to categorise the users' interest and demographical profiles with the purpose of customising the website content depending on the visitor.
1P_JAR	These cookies are used to gather website statistics, and track conversion rates.
APISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
HSID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
NID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SAPISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SIDCC	Security cookie to protect users data from unauthorised access.
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__utmx	This cookie is associated with Google Website Optimizer, a tool designed to help site owners improve their wbesites. It is used to distinguish between two varaitions a webpage that might be shown to a visitor as part of an A/B split test. This helps site owners to detemine which version of a page performs better, and therefore helps to improve the website.
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Name	Descripiton
_hjid	Hotjar cookie. This cookie is set when the customer first lands on a page with the Hotjar script. It is used to persist the random user ID, unique to that site on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.
_hjIncludedInSample	This cookie is associated with web analytics functionality and services from Hot Jar, a Malta based company. It uniquely identifies a visitor during a single browser session and indicates they are included in an audience sample.
intercom-id-[xxx]	This cookie is used by Intercom as a session so that users can continue a chat as they move through the site.
intercom-session-[xxx]	Used to keeping track of sessions and remember logins and conversations.
demdex	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
CookieConsent	Stores the user's cookie consent state for the current domain.
__cfduid	Used by the content network, Cloudflare, to identify trusted web traffic.
ss	These cookies enable the website to provide enhanced functionality and personalisation . They may be set by us or by third party providers whose services we have added to our pages. These services may include the Live Chat facility, Contact Us form(s), the Product Quotation forms and submission process, and the Email Newsletter sign up functionality .

Name	Descripiton
_ga	This cookie name is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page. Registers a unique ID that is used to generate statistical data on how the visitor uses the website. request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.
_gat	Used by Google Analytics to throttle request rate. This cookie name is associated with Google Universal Analytics, according to documentation it is used to throttle the request rate - limiting the collection of data on high traffic sites. It expires after 10 minutes.
_gid	This cookie name is asssociated with Google Universal Analytics. This appears to be a new cookie and as of Spring 2017 no information is available from Google. It appears to store and update a unique value for each page visited. Registers a unique ID that is used to generate statistical data on how the visitor uses the website.
IDE	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
r/collect	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
test_cookie	Used to check if the user's browser supports cookies.
collect	Used to send data to Google Analytics about the visitor's device and behaviour. Tracks the visitor across devices and marketing channels.
ads/user-lists/#	These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites.
c	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
khaos	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
put_#	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpb	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpx	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
tap.php	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.

규칙 요약: 웹 서버 보안 및 트로이 목마 탐지

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