CVE-2023-22518 탐지: Atlassian Confluence의 새로운 심각한 취약점 악용이 Cerber 랜섬웨어 배포로 이어지다

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Veronika Telychko

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11월 07, 2023 · 3 분 읽기

CVE-2023-22518 탐지: Atlassian Confluence의 새로운 심각한 취약점 악용이 Cerber 랜섬웨어 배포로 이어지다

치명적인 Confluence 제로데이가 공개된 지 한 달 만에 추적된 CVE-2023-22515 과 사이버 위협 영역에서 Atlassian 제품에 영향을 미치는 새로운 취약성이 등장했습니다. 적대자들은 Confluence Data Center 및 Confluence Server의 모든 버전에서 인증 우회가 가능한 CVE-2023-22518로 알려진 최근 수정된 최고 심각도의 취약성에 주목하고 있습니다. 공격자는 CVE-2023-22518 익스플로잇을 악용하여 표적 사용자의 파일을 Cerber 랜섬웨어로 암호화합니다.

CVE-2023-22518 익스플로잇 시도 탐지

또 다른 중요한 보안 버그가 레이더에 포착되었습니다. CVE-2023-22518이 높은 심각도 등급을 획득하고 모든 Confluence 버전에 영향을 미친다는 점에서 사이버 방어자는 이 주목받고 있는 보안 문제를 이용한 공격의 급증을 막기 위한 신뢰할 수 있는 탐지 콘텐츠가 필요합니다.

집합적 사이버 방어를 위한 SOC Prime 플랫폼은 수십 개의 보안 분석 플랫폼에 맞춰져 있으며 MITRE ATT&CK® 프레임워크에 매핑된 사전 준비된 Sigma 규칙 세트를 제공하여 간소화된 위협 조사를 제공합니다.

Windows/Linux 환경에서의 가능한 익스플로잇 시도를 식별하기 위해 아래의 전용 콘텐츠를 활용하십시오.

가능한 CVE-2023-22518 (Atlassian Confluence) 익스플로잇 시도 [Windows] (프로세스 생성 경로)

가능한 CVE-2023-22518 (Atlassian Confluence) 익스플로잇 시도 [Linux] (프로세스 생성 경로)

가능한 CVE-2023-22518 (Atlassian Confluence) 익스플로잇 시도 (웹서버 경로)

Confluence Server 및 Data Center 미인가 원격 코드 실행 취약성 [CVE-2022-26134] 이후 가능 실행 활동 (cmdline 경로)

특히, 목록에 있는 마지막 규칙(CVE-2022-26134 익스플로잇 탐지에 전념하고 2022년에 출시된)은 Linux 환경에서의 행위 중첩도로 인해 CVE-2023-22518과 관련된 공격 활동을 포착하는 데 도움이 됩니다.

또한, 아래 규칙은 Windows 인스턴스에서 CVE-2023-26134 익스플로잇과 관련된 일반 악의적인 패턴을 탐지할 수 있습니다:

가능한 웹 서버 또는 웹앱 익스플로잇 (cmdline 경로)

최근 공격과 관련된 Windows 및 Linux 환경에서의 이후 공격 활동을 조사하려면 아래 Sigma 규칙을 확인하십시오:

표준 도구를 통한 원격 파일 복사 (cmdline 경로)

Powershell을 통한 다운로드 또는 업로드 (cmdline 경로)

떠오르는 CVEs 탐지를 위한 SOC 콘텐츠의 포괄적인 리스트에 접근하려면 탐지 탐색 버튼을 클릭하십시오. 보안 전문가는 ATT&CK 참조 및 CTI 링크가 포함된 심층적 정보와 조직 특정 요구에 맞춘 실행 가능한 메타데이터를 얻어 간소화된 위협 연구를 할 수 있습니다.

탐지 탐색

CVE-2023-22518 분석

Atlassian은 최근에 보안 공지 를 통해 모든 Confluence Data Center 및 Server 소프트웨어 버전에 영향을 미치는 CVE-2023-22518로 식별된 새로운 부적절한 인증 취약성에 대해 방어자들에게 경고했습니다. 2023년 11월 6일에 Atlassian은 CVE-2023-22518의 적극적인 익스플로잇과 랜섬웨어 공격에서의 사용을 강조하는 업데이트를 추가했습니다. 공개된 보안 버그와 관련된 위험의 극적인 증가 및 공개적으로 이용 가능한 PoC 익스플로잇으로 인해 CVE-2023-22518은 CVSS 척도에서 최고 등급인 10을 받았습니다. 다행히 이 취약성은 atlassian.net 도메인을 통해 접근되는 Atlassian Cloud 웹사이트에는 영향을 미치지 않습니다.

공개된 보안 버그는 인증되지 않은 공격자가 Confluence를 재설정하고 모든 관리 작업을 수행할 수 있는 권한이 있는 계정을 생성하여 전체 시스템 손상을 초래할 수 있게 합니다.

Rapid7은 최근 일련의 고객 환경에서 CVE-2023-22518의 익스플로잇을 관찰하였으며, 취약한 Confluence 서버에 Cerber 랜섬웨어를 배포하려는 시도도 포함되어 있습니다.

모든 Confluence Data Center 및 Server 버전이 영향을 받으며 Atlassian은 이 문제를 완화하기 위해 즉각적으로 지정된 LTS 버전 또는 최신 버전의 패치를 적용할 것을 권장합니다. 패치 적용 시 문제가 발생하는 경우, 잠재적으로 영향을 받을 수 있는 인스턴스를 백업하고 외부 네트워크 액세스를 제한하며 특정 Confluence 엔드포인트에서의 액세스를 비활성화하는 것이 공격 백터를 줄이기 위한 임시 해결책으로 사용될 수 있습니다.

간단한 Shodan 검색에 따르면, 현재 20,000개 이상의 Confluence 인스턴스가 인터넷에 공개되어 있지만, 이들 중 얼마나 많은 것이 CVE-2023-22518 공격에 취약한지는 특정하기 어렵습니다. 이 숫자는 크게 증가했습니다 다른 Confluence 취약성이 공개된 이후인 CVE-2022-26134 2022년에

PoC 발견으로 인한 CVE-2023-22518 익스플로잇 시도의 증가된 위험은 조직의 인프라를 보호하기 위한 방어자의 초고속 대응을 요구합니다. SOС Prime의 위협 탐지 마켓플레이스는 최신 행동 기반 탐지 알고리즘에 대한 접근을 제공하고, 맞춤화된 정보를 통해 사이버 방어자를 지원하여 랜섬웨어 공격 및 모든 범위의 새로운 위협을 앞서 나갈 수 있게 합니다.

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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.

CVE-2023-22518 탐지: Atlassian Confluence의 새로운 심각한 취약점 악용이 Cerber 랜섬웨어 배포로 이어지다

CVE-2023-22518 익스플로잇 시도 탐지

CVE-2023-22518 분석

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사이버 방어를 강화하세요 위협 탐지 마켓플레이스

CVE-2023-22518 탐지: Atlassian Confluence의 새로운 심각한 취약점 악용이 Cerber 랜섬웨어 배포로 이어지다

CVE-2023-22518 익스플로잇 시도 탐지

CVE-2023-22518 분석

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사이버 방어를 강화하세요 위협 탐지 마켓플레이스

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