UAC-0050 Attack Detection: Hackers Are Armed with Remcos RAT, Quasar RAT, and Remote Utilities to Target Ukraine Once Again

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Veronika Telychko

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1月 12, 2024 · 6 分で読めます

UAC-0050 Attack Detection: Hackers Are Armed with Remcos RAT, Quasar RAT, and Remote Utilities to Target Ukraine Once Again

2023年の終わりに、悪名高い UAC-0050グループがサイバー脅威の舞台に現れ、ウクライナを狙い、Remcos RATを利用しました。これは、グループの攻撃ツールキットの一般的なマルウェアです。2024年1月の最初の10日間で、UAC-0050は再び現れ、Remcos RAT、Quasar RAT、Remote Utilitiesを悪用して攻撃を行います。

CERT-UA#8453とCERT-UA#8494のアラートで取り上げられたUAC-0050活動の検出

2023年後半、UAC-0050グループに関連するウクライナの組織に対するフィッシング攻撃が顕著に増加しました。2024年の始めに、UAC-0050の脅威アクターが再び攻撃し、被害者をフィッシングメールを開いてターゲットシステムを侵害するよう誘導しようとしました。集団サイバー防御のためにSOC Primeプラットフォームを利用することで、組織はサイバー攻撃を効果的に未然に防ぎ、敵の侵入リスクを最小限に抑えることができます。このプラットフォームにログインして、 MITRE ATT&CK® にマッピングされ、自動的に数十のサイバーセキュリティ言語に変換可能な専用の検出アルゴリズムセットにアクセスします。すべての検出は、関連するCERT-UAレポートに基づいてタグ付けされており、コンテンツ検索を容易にします。

CERT-UA#8453とCERT-UA#8494のアラートで対処されたUAC-0050攻撃を検出するためのSigmaルール

防御を強化し、検出カバレッジのすべてのギャップを埋めようとする革新的な企業は、UAC-0050攻撃検出のためにカスタマイズされた包括的な検証済みルールとクエリのセットを利用できます。「 検出を探索する」 で、脅威インテルと関連メタデータで強化された専用のSOCコンテンツにアクセスしてください。

検出を探索する」

CERT-UAはまた、 IOCsのリストを提供しており、これを用いてレトロスペクティブハンティングを促進できます。 Uncoder IOを使用することで、セキュリティエンジニアは提供された脅威インテリジェンスを利用してIOCマッチングを簡素化し、複数のSIEMまたはEDR環境に合わせたカスタム検索クエリをシームレスに生成できます。

MITRE ATT&CKコンテクスト

SOCチームメンバーは、CERT-UA#8453とCERT-UA#8494の告知に記載された攻撃詳細も調査できます。以下の表に飛び込んで、上記のSigmaルールにリンクされた適用可能なすべての敵のTTPのリストを確認してください：

Tactics	Techniques	Sigma Rule
Initial Access	Phishing (T1556)	Suspicious Execution from Mounted Drive [WinRAR/7zip] (via process_creation)
	Phishing: Spearphishing Attachment (T1566.001)	Suspicious Archive in Archive Execution (via process_creation)
	Phishing: Spearphishing Attachment (T1566.001)	Execution from RAR Archive [WinRAR] (via process_creation)
Execution	Exploitation for Client Execution (T1203)	Suspicious Archive in Archive Execution (via process_creation)
	Exploitation for Client Execution (T1203)	Execution from RAR Archive [WinRAR] (via process_creation)
	Scheduled Task / Job (T1053)	LOLBAS Schtasks (via cmdline)
	Software Deployment Tools (T1072)	Alternative Remote Access Software (via system)
		Alternative Remote Access Software (via audit)
		Alternative Remote Access Software (via process_creation)
	Command and Scripting Interpreter: PowerShell (T1059.001)	Suspicious Powershell Strings (via cmdline)
		Possible Base64 Encoded Malicious Stuff (via cmdline)
		Suspicious Powershell Strings (via powershell)
	Command and Scripting Interpreter: Windows Command Shell (T1059.003)	Suspicious Powershell Strings (via cmdline)
	Command and Scripting Interpreter: Visual Basic (T1059.005)	LOLBAS WScript / CScript (via process_creation)
	Command and Scripting Interpreter: JavaScript (T1059.007)	LOLBAS WScript / CScript (via process_creation)
Persistence	Boot or Logon Autostart Execution (T1547)	Suspicious Sctipts in Autostart Location (via file_event)
Defense Evasion	Indicator Removal (T1070)	Suspicious Operations on Ms-settings Regsistry Key (via cmdline)
	Indicator Removal: File Deletion (T1070.004)	Suspicious Hands-on or Scripting Operation was Performed in Unusual Folders (via cmdline)
	Masquerading (T1036)	Suspicious Hands-on or Scripting Operation was Performed in Unusual Folders (via cmdline)
	Masquerading: Match Legitimate Name or Location (T1036.005)	Suspicious Office-Named Application Execution From Unusual Location (via process_creation)
	Masquerading: Double File Extension (T1036.007)	Possible Malicious File Double Extension (via process_creation)
	Masquerading: Masquerade File Type (T1036.008)	Unusual Extension of Executable Binary (via process_creation)
	Visualization / Sandbox Evasion: Time Based Evasion (T1497.003)	Possible PING Usage for Delay Execution (via cmdline)
	System Script Proxy Execution (T1216)	LOLBAS WScript / CScript (via process_creation)
	System Binary Proxy Execution (T1218)	LOLBAS Schtasks (via cmdline)
	Obfuscated Files or Information (T1027)	Possible Base64 Encoded Malicious Stuff (via cmdline)
	Subvert Trust Controls (T1553)	Suspicious Execution from Mounted Drive [WinRAR/7zip] (via process_creation)
Command and Control	Ingress Tool Transfer (T1105)	Windows Binary was Downloaded From Bitbucket (via proxy)
	Remote Access Software (T1219)	Alternative Remote Access Software (via system)
		Alternative Remote Access Software (via audit)
		Alternative Remote Access Software (via process_creation)
		Possible Command and Control Activity by Remote Access Software Domain Communication Attempt (via dns)

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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 Attack Detection: Hackers Are Armed with Remcos RAT, Quasar RAT, and Remote Utilities to Target Ukraine Once Again

最新のCERT-UAレポートに基づくUAC-0050の攻撃活動概要

CERT-UA#8453とCERT-UA#8494のアラートで取り上げられたUAC-0050活動の検出

MITRE ATT&CKコンテクスト

目次

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サイバー防御を強化する脅威検出マーケットプレイス

UAC-0050 Attack Detection: Hackers Are Armed with Remcos RAT, Quasar RAT, and Remote Utilities to Target Ukraine Once Again

最新のCERT-UAレポートに基づくUAC-0050の攻撃活動概要

CERT-UA#8453とCERT-UA#8494のアラートで取り上げられたUAC-0050活動の検出

MITRE ATT&CKコンテクスト

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

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サイバー防御を強化する脅威検出マーケットプレイス

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