UAC-0173 공격: 우크라이나 사법 기관 및 공증인에 AsyncRAT 악성코드 대규모 타겟팅

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Daryna Olyniychuk

마케팅 팀 리드

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8월 28, 2023 · 3 분 읽기

UAC-0173 공격: 우크라이나 사법 기관 및 공증인에 AsyncRAT 악성코드 대규모 타겟팅

사이버 보안 전문가들은 우크라이나의 공공 및 민간 부문을 대상으로 하는 악성 활동의 큰 증가를 관찰하고 있으며, 가해 세력은 종종 피싱 공격 벡터 에 의존하여 침입을 진행합니다.

CERT-UA 는 우크라이나의 사법 기관과 공증인을 대상으로 하는 진행 중인 악성 캠페인에 대해 사이버 방어자에게 알립니다. 공식 문서로 위장한 유혹 주제와 악성 첨부 파일을 대량으로 배포하는 이메일을 통해 UAC-0173으로 추적되는 적들이 AsyncRAT 악성코드를 시스템에 감염시켜 표적 사용자를 손상시키려고 시도합니다. AsyncRAT 악성코드.

UAC-0173 공격 설명: AsyncRAT을 활용하여 사법 기관 및 공증인을 목표로

2023년 8월 28일, CERT-UA 팀은 경고 를 발령하였으며, 2023년 1분기부터 우크라이나 사법 기관과 공증인을 겨냥한 UAC-0173 공격을 다룹니다. 주목받고 있는 악성 캠페인은 표적화된 이메일 배포로, BZIP, GZIP, RAR 아카이브에 BAT 파일을 담아 제공합니다. BAT 파일은 ScrubCrypt crypter 의 도움으로 생성되며, 실행 시 영향을 받는 시스템에 AsyncRAT 악성코드를 설치합니다. 이 캠페인은 지역 공증인 부서의 공식 서신과 법무부 통지를 참조한 특정 주제와 파일 이름을 사용하였습니다.

공격 체인은 PowerShell 코드가 포함된 BAT/CMD 파일의 실행을 포함합니다. 이 PowerShell 코드는 .NET 파일을 디코딩, 복호화, 압축 해제 및 실행하도록 설계되어 있으며, 이는 AsyncRAT의 실행을 시작합니다.

악성 활동은 UAC-0173 식별자로 추적됩니다. 그러나 확신이 낮은 상태로 CERT-UA 전문가들은 이 공격을 UAC-0007 그룹(또는 BlackNotary)으로 귀속시킵니다.

CERT-UA#7372 경고에 포함된 UAC-0173 악성 활동 탐지

우크라이나 공공 및 민간 부문에 대한 사이버 공격의 급증은 사이버 방어자가 잠재적 위협을 식별하고 완화하기 위해 초고속 대응이 필요합니다. SOC Prime Platform은 고급 및 비용 효율적인 위협 탐지 도구를 제공하여 사이버 방어 능력을 향상시키고 보안 운영 센터의 투자 가치를 극대화합니다.

진행 중인 UAC-0173 공격을 사전에 탐지하기 위해 SOC Prime Platform은 광범위한 사이버 위협 인텔리전스로 강화된 선택된 Sigma 규칙 세트를 제공합니다. 이는 MITRE ATT&CK® 프레임워크에 매핑됩니다. 모든 탐지 알고리즘은 다양한 SIEM, EDR, XDR, 데이터 레이크 형식으로 쉽게 변환될 수 있으며, 자동 변환 지원이 제공됩니다.

모든 탐지 규칙은 그룹 및 경고 식별자(“CERT-UA#7372”, “UAC-0173”)에 연결된 관련 태그로 분류됩니다. 이 태그 시스템은 사용자가 필요에 따라 콘텐츠 검색을 선택하고 간소화할 수 있도록 합니다. 사이버 위협 컨텍스트로 강화된 관련 Sigma 규칙의 전체 컬렉션에 액세스하려면 아래의 탐지 탐색 버튼을 클릭하십시오.

탐지 탐색

또한, 사이버 방어자들은 AsyncRAT 악성코드 공격을 식별하는 데 도움이 되는 탐지 규칙 세트를 얻을 수 있습니다. 자세한 위협 인텔리전스와 함께 규칙 목록을 탐색하려면 이 링크 를 따라가십시오.

보안 전문가들은 또한 Uncoder AI라는 SOC Prime의 증강 인텔리전스 프레임워크를 활용하여 최신 CERT-UA 경고에서 제안된 IOC 기반으로 즉시 IOC 쿼리를 생성하여 위협 연구를 가속화할 수 있습니다.

MITRE ATT&CK 맥락

SOC 팀 구성원은 또한 CERT-UA#7372 경고에 포함된 공격 세부 사항을 탐색할 수 있습니다. 아래 표를 참조하여 깊이 있는 분석을 위해 위에 언급된 Sigma 규칙과 관련된 모든 적용 가능한 적 전술, 기술 및 하위 기술 목록을 확인하십시오:

Tactics	Techniques	Sigma Rule
Initial Access	Phishing: Spearphishing Attachment (T1566.001)	Execution from RAR Archive [WinRAR] (via process_creation)
		MSOffice Drops Suspicious Files (via file_event)
		Suspicious Extracted Files from an Archive (via file_event)
		Archive Extraction Directly from Mail Client (via process_creation)
Defense Evasion	Hide Artifacts: Hidden Window (T1564.003)	The Possibility of Execution Through Hidden PowerShell Command Lines (via cmdline)
Command and Control	Ingress Tool Transfer (T1105)	Download or Upload via Powershell (via cmdline)
Execution	Command and Scripting Interpreter: PowerShell (T1059.001)	The Possibility of Execution Through Hidden PowerShell Command Lines (via cmdline)
		Call Suspicious .NET Methods from Powershell (via powershell)
		Suspicious Powershell Strings (via cmdline)
		Suspicious Powershell Strings (via powershell)
		Call Suspicious .NET Classes/Methods from Powershell CommandLine (via process_creation)
		Possible Execution by Use of Short Script Name (via cmdline)
		Download or Upload via Powershell (via cmdline)
	Command and Scripting Interpreter: Windows Command Shell (T1059.003)	Suspicious Powershell Strings (via cmdline)
		Suspicious Powershell Strings (via cmdline)
	Command and Scripting Interpreter: JavaScript (T1059.007)	Possible Execution by Use of Short Script Name (via cmdline)
	Command and Scripting Interpreter: Visual Basic (T1059.005)	Possible Execution by Use of Short Script Name (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-0173 공격: 우크라이나 사법 기관 및 공증인에 AsyncRAT 악성코드 대규모 타겟팅

UAC-0173 공격 설명: AsyncRAT을 활용하여 사법 기관 및 공증인을 목표로

CERT-UA#7372 경고에 포함된 UAC-0173 악성 활동 탐지

MITRE ATT&CK 맥락

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관련 게시물

사이버 방어를 강화하세요 위협 탐지 마켓플레이스

UAC-0173 공격: 우크라이나 사법 기관 및 공증인에 AsyncRAT 악성코드 대규모 타겟팅

UAC-0173 공격 설명: AsyncRAT을 활용하여 사법 기관 및 공증인을 목표로

CERT-UA#7372 경고에 포함된 UAC-0173 악성 활동 탐지

MITRE ATT&CK 맥락

#ez_toc_widget_sticky-2 .ez-toc-widget-sticky-container ul.ez-toc-widget-sticky-list li.active{ background-color: #ededed; } 목차

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관련 게시물

사이버 방어를 강화하세요 위협 탐지 마켓플레이스

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