규칙 요약. APT 및 악성코드: 이번 주 발행된 콘텐츠

작성자

Eugene Tkachenko

커뮤니티 프로그램 리드

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5월 02, 2020 · 3 분 읽기

이번 주, 우리 팀과 SOC Prime Threat Bounty Program 참가자들이 작성한 멀웨어 및 APT 활동을 탐지할 수 있는 규칙이 주목을 받았습니다. 저희 다이제스트에서는 지난주에 게시된 흥미로운 규칙에 주목하기를 권장합니다.

APT StrongPity Ariel Millahuel 작성

https://tdm.socprime.com/tdm/info/lC2OEeruDxdg/fos3nHEB1-hfOQir9NI-/?p=1

StrongPity APT (프로메티움으로도 알려짐)는 합법적인 소프트웨어의 오염된 설치 프로그램을 악용하여 피해자를 감염시키고, 이 독점 규칙은 이러한 행동을 파악하는 데 도움을 줍니다. APT 그룹은 최소한 2012년부터 주로 유럽과 북아프리카의 타겟을 공격하며 사이버 스파이 활동을 수행하였습니다. StrongPity 스파이 APT 활동은 추적이 매우 어려운 것으로, 공격 시 서명된 모듈형 멀웨어를 사용하며, 또한 이들은 제로데이 취약점을 악용하는 것으로도 알려져 있습니다.

이중 확장자와 함께한 잠재적인 악성 LNK 파일 (cmdline 이용) SOC Prime 팀 작성https://tdm.socprime.com/tdm/info/lwTxvspCLlJF/Mwm5vHEBAq_xcQY4MuED/?p=1

비슷한 규칙을 이번 주의 규칙이라는 제목 아래서 강조하였으며, 이중 확장자 남용이 Windows 사용자에게 심각한 위협이라는 점을 믿습니다. 이 규칙은 LNK 확장자를 악의적으로 사용하는 경우를 밝혀내며, 이것은 EXE만큼 자주 악용됩니다. LNK 파일은 안티바이러스 솔루션에서 덜 의심스럽게 보이며, 사용자가 이를 열면 원격으로 다운로드된 스크립트가 실행될 수 있으며, 이는 적이 피해자를 감염시키는 가장 경제적인 방법 중 하나입니다.

의심스러운 프로세스 접근 (sysmon 이용) SOC Prime 팀 작성https://tdm.socprime.com/tdm/info/S34YfAqmYUYv/oIstvXEB1-hfOQiro-2_/?p=1

이 규칙은 시스템 과정에 대한 비정상적인 위치의 의심스러운 접근을 추적하여 시스템의 악의적 활동을 나타낼 수 있습니다. 이러한 활동은 조사되어야 하며, 오탐 방지를 위해서는 모든 이벤트를 확인하고 화이트리스트를 구축해야 합니다.

AD 모듈을 이용한 RSAT 또는 관리자 권한 없이의 의심스러운 Active Directory 열거 (powershell 이용) SOC Prime 팀 작성 https://tdm.socprime.com/tdm/info/dsqELFx5ckXR/OsJb0G0BEiSx7l0HXZMS/?p=1

적들은 RSAT에 있는 DLL을 시스템에서 가져와 열거하려는 시스템(즉, RSAT가 설치되어 있지 않은 곳)에 던져놓고, 그 DLL을 모듈로 간단히 가져올 수 있습니다. 이 규칙으로, 그것을 적시에 탐지하고 사이버 공격을 초기 단계에서 파악할 수 있습니다.

Chthonic 뱅킹 트로이 목마 Ariel Millahuel 작성

https://tdm.socprime.com/tdm/info/LBnEPGjxVeGO/j-bEwHEBv8lhbg_ijYGH/?p=1

이 규칙은 Chthonic의 새로운 인스턴스를 감지하는데, 이는 Zeus의 변종이며, ZeusVM의 진화된 형태로 보입니다. Chthonic은 Zeus AES 및 Zeus V2 트로이 목마와 같은 암호화 방식, 그리고 ZeusVM 및 KINS 멀웨어에서 사용된 것과 유사한 가상 머신을 사용합니다.

이 컬렉션의 규칙은 다음과 같은 플랫폼에 대한 번역을 포함합니다:

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: Corelight

이 규칙들은 MITRE ATT&CK의 다음 전술 및 기술과 연결되어 있습니다:

전술: 초기 접근, 실행, 권한 상승, 방어 회피, 발견.

기술: 스피어피싱 첨부 파일 (T1193), 레지스트리 수정 (T1112), 프로세스 주입 (T1055), 계정 발견 (T1087), 명령줄 인터페이스 (T1059)

또한, 우리는 이번 주에 Threat Detection Marketplace의 주요 업데이트가 있었다는 것을 상기시키고 싶습니다. Humio 및 CrowdStrike에 대한 지원 추가와 그에 대한 번역 포함이었습니다. 현재까지 플랫폼에서 사용 가능한 규칙 수는 57,000개를 초과했습니다!

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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.
sp_i	Used to store information about authenticated User.
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.
SSID	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.
__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.
__utmxx	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.

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. APT 및 악성코드: 이번 주 발행된 콘텐츠

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