Stay Ahead of Cyber Threats – Daily Security Insights, Powered by AI
June 15, 2022
by Steven Adair, Thomas Lancaster, Volexity Threat Research
Volexity frequently works with individuals and organizations heavily targeted by sophisticated, motivated, and well-equipped threat actors from around the world. Some of these individuals or organizations are attacked infrequently or on an irregular basis, while others see a barrage of attacks nearly every week.…
A new remote code execution vulnerability called “Follina” has been found lurking in most Microsoft products. In this blog, we examine a potential attack vector as well as technical details of Follina, and chart the ability to detect this new vulnerability using both Qualys Multi-Vector EDR and Qualys Context XDR.…
This research is a joint effort between Joakim Kennedy, Security Researcher at Intezer, and the BlackBerry Research & Intelligence Team. It can be found on the Intezer blog here as well.
In biology, a symbiote is an organism that lives in symbiosis with another organism. The symbiosis can be mutually beneficial to both organisms, but sometimes it can be parasitic when one benefits and the other is harmed.…
Research by: Ashwin Vamshi and Shilpesh Trivedi…
As Russia’s invasion of Ukraine continues, new wiper malware has surfaced attacking Ukrainian infrastructure. Caddywiper was first detected on March 14, 2022. It destroys user data, partitions information from attached drives, and has been spotted on several dozen systems in a limited number of organizations. CaddyWiper has been deployed via GPO, suggesting the attackers had initially compromised the target’s Active Directory server.…
Morphisec Labs has detected a new wave of Remcos trojan infection. The theme of the phishing emails is again financial, this time as payment remittances sent from financial institutions. The attacker lures a user to open a malicious Excel file that contains “confidential information” which starts the infection chain.…
By Securonix Threat Labs, Threat Research
IntroductionThe Securonix Threat Research team has identified a currently unpatched zero-day vulnerability in Spring Core, a widely used Java-based platform with cross platform support. Early details claim that the bug would allow full remote code execution (RCE) to affected systems.…
Morphisec Labs has observed a new wave of JSSLoader infections this year. We’ve tracked JSSLoader activity since December 2020 and published a thorough report on the Russian criminal hacking group FIN7’s JSSLoader: The Evolution of the FIN7 JSSLoader. JSSLoader is a small, very capable .NET remote access trojan (RAT).…
Our Threat Research team maintains a vigilant watch over the cyber threat landscape, hunting for malware as a normal course of operations.…
Summary
Multifactor Authentication (MFA): A Cybersecurity Essential• MFA is one of the most important cybersecurity practices to reduce the risk of intrusions—according to industry research, users who enable MFA are up to 99 percent less likely to have an account compromised.• Every organization should enforce MFA for all employees and customers, and every user should sign up for MFA when available.•…
I came across a fairly interesting VBS-based DanaBot downloader the other day, and I figured it was worth doing a quick write-up on the obfuscation scheme and a few of the other TPPs I observed. The social engineering pretext used in this campaign was interesting as it leveraged an “unclaimed property” themed lure and required user interaction to deliver the first stage payload.…
隨著金融科技的技術持續發展，金融產業使用了更多的資訊系統，便也代表著比起過去任何時候，潛藏了更多未知的資安威脅，而駭客入侵所造成的影響，往往也牽一髮而動全身，有著絕不可小覷的風險。
2021 年底一連串我國證券商與期貨商遭受駭客撞庫攻擊、導致下單系統異常的新聞，在當時引發了社會上一片軒然大波。奧義智慧研究團隊在參與事件調查 (Incident Response, IR) 時，成功挖掘出關於金融攻擊事件的更多內幕，本篇文章將帶您深入瀏覽與探討，來自中國國家級駭客的金融產業供應鏈攻擊手法剖析、惡意程式技術，與對應的緩解措施等。
事件緣起去年臺灣發生多起證券、期貨商遭到撞庫攻擊，甚至出現下單異常案件的情況，研判應為系統性問題而非單一個案，並且對於交易秩序的影響相當嚴重。該攻擊事件疑似為特定組織型駭客所發起，長期且有目的性的滲透行動，從攻擊手法中可以觀察到，駭客具有針對不同目標環境開發對應後門、躲避安全軟體偵測的能力，並十分擅長於企業內網攻擊，操作手法亦相當熟稔。
奧義智慧科技 (CyCraft) 於 2021 年 11 月底到 2022 年 2 月初，監控到一系列大範圍且專門針對臺灣金融單位軟體系統的供應鏈攻擊事件，遂而開始展開進一步詳細的調查。初步發現，攻擊者準確利用了我國金融單位常用的軟體系統之漏洞，第一波攻擊於 2021 年 11 月底出現受駭案例，第二波活動的高峰期則在 2022 年 2 月 10 至 13 號之間，攻擊者來源 IP 位於香港。
經調查，本次攻擊事件所使用之後門程式為 QuasarRAT，經過分析啟動方式、保護機制與使用之 C2 中繼站等情資後，研判應為中國國家級駭客 APT10 所發起的新活動，主要針對國內金融業發動攻擊。
由於在過去的資安研究之中，源於中國的 APT 組織一般較少以經濟獲益為目標，然而，本起行動中則明確有著盜竊金融資料的行為，因此奧義研究團隊以「咬錢熊貓」(Operation Cache Panda) 這項代稱來命名此行動。
攻擊手法剖析Operation Cache Panda 行動中，利用到了一項證劵軟體系統管理介面的網站服務漏洞。首先，攻擊者上傳了中國駭客常用之 ASPXCSharp WebShell 進行網站主機控制，之後便開始利用知名內網滲透工具 Impacket 掃描內網電腦，試圖大範圍植入DotNet 後門程式，並意圖竊取受駭單位資料。
攻擊者大量使用了動態載入 DotNet 組件檔案 (DotNet Assembly) 的技術，透過攻擊手法 Reflective Code Loading（MITRE ATT&CK 編號 T1620），動態注射惡意 DotNet Assembly 程式碼到系統以合法執行程序。
此次事件除了使用到可編譯不同平台 Shellcode、透過 In-Memory 的方式執行 DotNet Assembly 的開源專案 Donut 外，亦發現使用部分 SharpSploit 程式碼注入 DotNet惡意程式，可以達到無惡意模組落地的隱匿效果，藉以降低被防毒軟體偵測機率。
其後攻擊者將會搭配 Impacket，透過 Remote Service/WMI 方式橫向擴散到內部主機。一旦成功取得內部主機的控制權，攻擊者便會建立 Reverse Tunnel RDP，使其更容易地透過遠端桌面操作受駭主機。
在本次調查當中，我們發現駭客使用了名為文叔叔的中國雲端檔案分享服務來下載相關工具，藉以達到一定程度的方便性以及匿名性；不過，也正因如此，駭客在透過 RDP 登入受駭主機時，反而容易留下更多追查線索。
本次遭駭的軟體系統在臺據稱有八成以上的市佔率，屬於金融機構的供應鏈攻擊。據悉已有多家企業遭受 Operation Cache Panda 行動不同程度的影響，建議金融單位立即修補軟體系統漏洞，限制 Web 管理介面的存取範圍，並盤點本文文末所提供的入侵指標 (Indicator of Compromise, IoC)，包含網路 IP、檔案雜湊 (hash) 與惡意程式特徵等，另外也建議安裝奧義智慧的 Xensor EDR，開啟惡意程式保護模組 (Malware Protection Module) 以監控與阻擋相關的惡意活動。
奧義智慧第一時間監控，並告警駭客內網滲透活動奧義智慧全球情資平台 CyberTotal 歸因出攻擊者疑為 APT10攻擊技術分析 第一階段：突破與建立進入點本次攻擊所使用的 WebShell 取用於開源專案，此 Webshell 改良了中國駭客常用的蟻劍 WebShell 框架 (As-Exploits)，並加強其動態加載與執行 DotNet Assembly 的能力，透過 GetType[0] 取得和建構出 Payload 的 Run類型，以確保能做到無惡意檔案落地與不會留下 Web存取紀錄之效果。
第二階段：移動與潛伏Operation Cache Panda 事件的攻擊者使用到六隻惡意程式，其中，只有三個檔案會落地，其餘皆在動態下載後載入。這六隻惡意程式各自負責了不同的功能，並串連成了本次的攻擊，整體流程請參照下方圖片。
惡意程式架構與活動分析PresentationCache.exe…
Morphisec, through its breach prevention with Moving Target Defense technology, has identified a new, sophisticated campaign delivery which has been successfully evading the radar of many security vendors. Through a simple email phishing tactic with an html attachment, threat attackers are delivering AsyncRAT (a remote access trojan) designed to remotely monitor and control its infected computers through a secure, encrypted connection.…
Over the past year, we have seen ransomware attackers change the way they have responded to organizations that have either chosen to not pay the ransom or have recovered their data via some other means. At the end of the day, fighting ransomware has resulted in the bad actors’ loss of revenue.…
In a recent report the McAfee Advanced Threat Research (ATR) Strategic Intelligence team disclosed an espionage campaign, targeting telecommunication companies, named Operation Diànxùn.
The tactics, techniques and procedures (TTPs) used in the attack are like those observed in earlier campaigns publicly attributed to the threat actors RedDelta and Mustang Panda.…
In this report the McAfee Advanced Threat Research (ATR) Strategic Intelligence team details an espionage campaign, targeting telecommunication companies, dubbed Operation Diànxùn.
In this attack, we discovered malware using similar tactics, techniques and procedures (TTPs) to those observed in earlier campaigns publicly attributed to the threat actors RedDelta and Mustang Panda.…