UAC-0050 공격 감지: 해커들이 Remcos RAT을 확산시키며 또 다른 표적 캠페인 개시

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Veronika Telychko

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12월 01, 2023 · 2 분 읽기

UAC-0050 공격 감지: 해커들이 Remcos RAT을 확산시키며 또 다른 표적 캠페인 개시

다음 사건 바로 뒤를 이어 우크라이나 보안 서비스를 사칭한 피싱 공격 및 Remcos RAT을 사용한 해킹 집단으로 식별된 UAC-0050이 피싱 공격 벡터를 활용하여 우크라이나를 대상으로 또 다른 적대적 캠페인을 개시했습니다. 이 공격에서는 15,000명 이상의 사용자를 대상으로 소환장을 법원 주제로 하는 이메일을 대량으로 보내며, 감염된 시스템에 Remcos RAT을 확산시키려는 목적으로 주제를 유인하고 첨부파일을 포함하고 있습니다.

UAC-0050과 연관된 피싱 공격 분석 및 Remcos RAT 확산

최신 CERT-UA#8150 경고는 UAC-0050 위협 행위자가 배포하는 또 다른 악성 활동을 다룹니다 Remcos RAT 악성코드입니다. 적들은 소환장을 법원 주제로 남용하여 타겟 사용자들을 유인하여 악성 이메일 콘텐츠와 RAR 첨부파일을 열게 합니다. 후자는 DOC 파일과 악성 매크로가 들어 있는 비밀번호로 암호화된 파일을 포함하고 있습니다. 활성화되면 코드 매크로가 탐색기.exe를 통해 SMB 프로토콜로 손상된 기계에서 실행 파일을 실행합니다. 이 EXE 파일은 Remcos RAT을 암호 해독하고 시작하도록 설계된 SmartAssembly .NET 기반 소프트웨어를 사용하여 흐린화됩니다.

특히, 최신 UAC-0050 캠페인은 UAC-0050 최소 15,000명의 사용자를 우크라이나 사법 당국 중 하나의 합법적으로 손상된 이메일 계정을 이용하여 타겟팅합니다. 잠재적인 피해자의 범위를 고려할 때, CERT-UA는 위협을 해결하기 위해 긴급한 조치를 취하는 것이 중요하다고 강조합니다.

CERT-UA#8150 경고에 포함된 UAC-0050 캠페인 탐지

우크라이나에 대한 UAC-0050 공격이 증가함에 따라 방어자들은 위협 탐지 능력을 강화하고 인프라를 적의 침입으로부터 보호할 방법을 모색하고 있습니다. SOC Prime Platform은 최신 CERT-UA 경고에 설명된 UAC-0050 그룹이 수행한 공격을 방지하기 위한 탐지 알고리즘 리스트를 제공합니다. 아래 링크를 사용하여 보안 공지 ID와 일치하는 ‘CERT-UA#8150’ 커스텀 태그로 필터링 된 관련 Sigma 규칙의 목록을 자세히 살펴볼 수 있습니다:

CERT-UA#8150 경고에 포함된 UAC-0050 공격 탐지 콘텐츠

모든 Sigma 규칙은 MITRE ATT&CK® 프레임워크와 일치하며, 맞춤형 정보로 강화되고 수십 개의 SIEM, EDR, XDR 및 Data Lake 솔루션에 걸쳐 활용할 수 있습니다.

UAC-0050 해킹 집단과 연관된 기존 피싱 공격을 견디기 위한 더 많은 탐지 콘텐츠를 찾고 있습니까? 클릭하세요 탐지 탐색 하여 UAC-0050 공격 탐지를 위한 Threat Detection Marketplace의 SOC 콘텐츠 전체 컬렉션에 액세스하고 항상 적보다 앞서가십시오.

탐지 탐색

SOC 분석가, 위협 사냥꾼, 그리고 CTI 전문가들은 자동 ICA 포장 기능을 제공하는 Uncoder IO 오픈 서치 IDE에서 탐지 공학을 활용할 수 있습니다. IOCs를 최신 CERT-UA 공지사항에서 붙여넣고 선택한 언어 형식에 맞춘 사용자 정의 검색 쿼리로 즉시 변환하여 UAC-0050 악성 활동을 원활하게 사냥할 수 있습니다.

MITRE ATT&CK 컨텍스트

또한 SOC 팀원들은 CERT-UA#8150 공지사항에 제공된 공격 세부 정보를 탐색할 수 있습니다. 심층 분석을 위해 위에서 언급한 Sigma 규칙과 연결된 모든 적용 가능한 적 전술, 기술, 하위 기술 목록을 찾으려면 아래 표로 이동하십시오:

Tactics	Techniques	Sigma Rule
Initial Access	Phishing: Spearphishing Attachment (T1566.001)	Suspicious MSOffice Child Process (via cmdline)
		Execution from RAR Archive [WinRAR] (via process_creation)
		Possible Opening Password Protected RAR Archive (via registry_event)
		Archive Extraction Directly from Mail Client (via process_creation)
		Suspicious Extracted Files from an Archive (via file_event)
		Execution from Zip (via process_creation)
Execution	Exploitation for Client Execution (T1203)	Suspicious MSOffice Child Process (via cmdline)
Execution	Exploitation for Client Execution (T1203)	Execution from RAR Archive [WinRAR] (via process_creation)
Persistence	Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder (T1547.001)	Possible Persistence Points [ASEPs - Software/NTUSER Hive] (via registry_event)
Defense Evasion	Masquerading (T1036)	Short File Name (via cmdline)
	Masquerading: Double File Extension (T1036.007)	Possible Malicious File Double Extension (via process_creation)
	Obfuscated Files or Information (T1027)	Possible Opening Password Protected RAR Archive (via registry_event)
Lateral Movement	Remote Services: SMB / Windows Admin Shares (T1021.002)	Suspicious Command Line Contains UNC Path with Executable as an Argument (via cmdline)

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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.

UAC-0050 공격 감지: 해커들이 Remcos RAT을 확산시키며 또 다른 표적 캠페인 개시

UAC-0050과 연관된 피싱 공격 분석 및 Remcos RAT 확산

CERT-UA#8150 경고에 포함된 UAC-0050 캠페인 탐지

MITRE ATT&CK 컨텍스트

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관련 게시물

사이버 방어를 강화하세요위협 탐지 마켓플레이스

UAC-0050 공격 감지: 해커들이 Remcos RAT을 확산시키며 또 다른 표적 캠페인 개시

UAC-0050과 연관된 피싱 공격 분석 및 Remcos RAT 확산

CERT-UA#8150 경고에 포함된 UAC-0050 캠페인 탐지

MITRE ATT&CK 컨텍스트

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