Resumo de Regras: RCE, CVE, OilRig e mais

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Eugene Tkachenko

Líder do Programa Comunitário

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Maio 16, 2020 · 4 min de leitura

Resumo de Regras: RCE, CVE, OilRig e mais

Este digest inclui regras de ambos os membros do Programa Bounty de Ameaças e da Equipe SOC Prime.

Vamos começar com regras de Arunkumar Krishna que estrearão em nosso Digest de Regras com CVE-2020-0932: Uma Falha de Execução Remota de Código no Microsoft SharePoint.

O CVE-2020-0932 foi corrigido em abril, ele permite que usuários autenticados executem código arbitrário em um servidor SharePoint. A configuração padrão do SharePoint permite que qualquer usuário autenticado explore essa vulnerabilidade. Tais falhas eram populares entre os atacantes no passado, por isso seria útil ter uma regra que descobrisse tentativas de exploração: https://tdm.socprime.com/tdm/info/zzrJT94vXLN2/4iG6EnIBjwDfaYjKDnwP/

Arunkumar também postou regras YARA para rastrear a exploração desta vulnerabilidade: https://tdm.socprime.com/tdm/info/vMZFVxJCHsrf/2uapEnIBv8lhbg_iH76X/

Emir Erdogan publicou uma regra para uma vulnerabilidade muito recente corrigida esta semana – Escalonamento de Privilégio do Print Spooler com um Comando powershell (CVE-2020-1048). Os atacantes podem explorar esta vulnerabilidade e executar código arbitrário com privilégios elevados do sistema para instalar malware, modificar dados ou criar novas contas com direitos de usuário completo. Eles também podem usá-la para elevar privilégios, contornar regras de EDR, ganhar persistência e muito mais. Um exploit de PoC também está disponível para esta falha de segurança.

A regra de Emir Erdogan é uma regra da Comunidade e está disponível para todos os usuários registrados do TDM, confira: https://tdm.socprime.com/tdm/info/durVnL5VeTW2/d4y1EnIB1-hfOQirFzA6/

A próxima regra em nosso digest é enviada por um dos nossos mais ativos membros do Programa Bounty de Ameaças cujas regras aparecem no blog toda semana, e você pode ler sua entrevista aqui. Nova regra da Comunidade por Ariel Millahuel descobre atividade de ciberespionagem Oilrig. O grupo Oilrig também conhecido como APT34 e Helix Kitten tem realizado ciberataques no interesse do governo iraniano desde 2014. Eles são mais ativos no Oriente Médio, mas este ano atualizaram seu arsenal para

Oilrig group also known as APT34 and Helix Kitten has performed cyberattacks in the interests of the Iranian government since 2014. They are most active in the Middle East, but this year they updated their arsenal to atacar entidades do governo dos EUA. Pesquisadores de segurança estão descobrindo regularmente novas ferramentas relacionadas a este grupo APT. A regra publicada por Ariel é baseada em descobertas recentes e pode detectar atividade do grupo Oilrig na rede da sua organização: https://tdm.socprime.com/tdm/info/Nvw0NkZgaA6d/JCEsoXEBjwDfaYjK9SI6/

A regra da Equipe SOC Prime detecta ataque DCShadow no Controlador de Domínio (DC). Os adversários podem usar recursos do Mimikatz para criar um DC do Active Directory falso e fazer alterações em um DC legítimo através da replicação. Você pode ler mais sobre este ataque aqui: https://attack.stealthbits.com/how-dcshadow-persistence-attack-works

Link para download Possível Ataque DCShadow (via auditoria) regra exclusiva aqui: https://tdm.socprime.com/tdm/info/i7cPkU1ko5H7/ATk-0G0BLQqskxffBI6L/

A última regra no digest de hoje é Possível uso de REG.EXE para persistência (via linha de comando) pela Equipe SOC Prime. Malware avançado moderno frequentemente usa o registro do Windows para persistência e até mesmo execução sem arquivo. A regra detecta tentativas de estabelecer um ponto de apoio em um host comprometido: https://tdm.socprime.com/tdm/info/eri0Ie3zVuoB/hSGzwXEBjwDfaYjKpEI5/?p=1

As regras desta coleção têm traduções para as seguintes plataformas:

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

MITRE ATT&CK:

Táticas: Evasão de Defesa, Movimento Lateral, Comando e Controle, Acesso Inicial, Acesso a Credenciais, Escalonamento de Privilégio, Execução

Técnicas: Token de Acesso a Aplicação (T1527) Ofuscação de Dados (T1001), Explorar Aplicação Exposta (T1190), Exploração para Acesso a Credenciais (T1212), Exploração para Escalonamento de Privilégio (T1068), Exploração de Serviços Remotos (T1210), Modificação de Permissões de Arquivos e Diretórios (T1222), Execução de Comandos Indiretos (T1202), InstallUtil (T1118), Arquivos ou Informações Ofuscados (T1027)

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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.

Resumo de Regras: RCE, CVE, OilRig e mais

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