Digest de Regras: Segurança de Servidor Web e Detecção de Trojans

ESCRITO POR

Eugene Tkachenko

Líder do Programa Comunitário

[post-views]

Maio 08, 2020 · 4 min de leitura

Digest de Regras: Segurança de Servidor Web e Detecção de Trojans

Continuamos chamando sua atenção para regras cujas capacidades estão além do conteúdo de detecção mais comum que analisa logs do Sysmon. Hoje em nosso resumo há duas regras para detectar ataques a servidores web, uma continuação de uma série de regras (1, 2) para descobrir traços de ataques do grupo de hackers Outlaw, e conteúdo de detecção que revela a porta dos fundos GRIFFON e o Trojan Qulab.

Padrões de User Agent Suspeitos (via web) pela equipe SOC Prime

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

Esta regra ajuda sua solução de segurança a encontrar User-Agents suspeitos nos logs da web e detectar scanners de aplicativos web ou ferramentas ofensivas com configurações padrão.

Padrões Possíveis de Injeções de Comandos do SO (via web) pela equipe SOC Prime

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

Esta regra ajuda a proteger seu servidor web de uma ameaça muito maior do que bots maliciosos. Com ela, você pode detectar injeções de shell que permitem que adversários executem comandos arbitrários do sistema operacional em seu servidor web. Injeções de shell podem levar ao comprometimento de outras partes da infraestrutura de hospedagem e movimentação lateral para outros sistemas na rede da sua organização.

Indicadores de Comportamento do Grupo de Hackers Outlaw (via cmdline) pela equipe SOC Prime

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

Escrevemos sobre este grupo em detalhe em um post na regra Sigma da comunidade. A regra de Indicadores de Comportamento do Grupo de Hackers Outlaw ajuda a detectar ações maliciosas que passam despercebidas por outras regras. Este conteúdo também foi traduzido para mais plataformas do que a regra Sigma universal de caça a ameaças.

Trojan Qulab (abuso do Covid-19) por Ariel Millahuel

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

A nova regra de Ariel ajuda a detectar o Trojan Qulab Clipper que é usado para monitorar a área de transferência do computador infectado e substituir informações associadas a transações de moeda digital. O Trojan também pode coletar e exfiltrar dados privados da máquina atacada. O Qulab Clipper está sendo distribuído em fóruns de hackers, e pesquisadores descobriram novas versões do malware que apareceram em meio à pandemia de COVID-19.

Backdoor “GRIFFON” do FIN7 por Ariel Millahuel

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

The FIN7 grupo não precisa de uma introdução especial, eles atacam instituições financeiras em todo o mundo há mais de 6 anos, e a prisão de seus líderes não levou à dissolução do grupo. O backdoor de entrega em JavaScript GRIFFON foi detectado em seus ataques recentes, cibercriminosos abusam do controle ActiveX para executar automaticamente a macro maliciosa após a ativação do conteúdo do documento. A regra Sigma de caça às ameaças da comunidade por Ariel Millahuel identifica características do backdoor GRIFFON que é usado para coletar informações e baixar outras ferramentas usadas pelo grupo.

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: Acesso Inicial, Execução, Persistência, Evasão de Defesa

Técnicas: Exploit de Aplicações Expostas (T1190), Interface de Linha de Comando (T1059), Modificação de Permissões de Arquivo e Diretório (T1222), Arquivos e Diretórios Ocultos (T1158), Agendamento de Tarefas Locais (T1168), Script (T1064), Instalar Certificado Raiz (T1130), Modificar Registro (T1112)

Participe do nosso programa Threat Bounty, escreva e publique conteúdo útil de detecção, e talvez na próxima semana sua regra apareça no resumo e sua entrevista seja publicada em nosso blog.

Saiba mais sobre o programa: https://my.socprime.com/en/tdm-developers

Leia entrevistas com nossos principais desenvolvedores: https://socprime.com/en/tag/interview/

Este artigo foi útil?

Curta e compartilhe com seus colegas.

Junte-se à plataforma Detection as Code da SOC Prime para melhorar a visibilidade das ameaças mais relevantes para o seu negócio. Para ajudá-lo a começar e obter valor imediato, agende uma reunião agora com os especialistas da SOC Prime.

Junte-se Gratuitamente Agende uma Reunião

Publicações Relacionadas

Ameaças Mais Recentes, Blog — 7 min de leitura

Tática de Execução | TA0002

Daryna Olyniychuk

Ameaças Mais Recentes, Blog — 2 min de leitura

PyVil RAT pelo Grupo Evilnum

Eugene Tkachenko

Ameaças Mais Recentes, Blog — 3 min de leitura

JSOutProx RAT

Eugene Tkachenko

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.

Digest de Regras: Segurança de Servidor Web e Detecção de Trojans

Este artigo foi útil?

Publicações Relacionadas

Fortaleça sua defesa cibernética com Marketplace de Detecção de Ameaças