Securities and Exchange Commission v. Covington & Burling LLP

District Court, District of Columbia·Decided July 24, 2023·No. Misc. No. 2023-0002·Published

Opinion

UNITED STATES DISTRICT COURT FOR THE DISTRICT OF COLUMBIA

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SECURITIES AND EXCHANGE ) COMMISSION, )

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Applicant, )

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v. ) Case No. 23-mc-00002 (APM)

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COVINGTON & BURLING, LLP, )

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Respondent. )

_________________________________________ )

MEMORANDUM OPINION

I. INTRODUCTION This case concerns the intersection of a federal law enforcement agency’s interest in rooting out possible law violations and a law firm’s ethical obligations to its clients. On March 21, 2022, the Securities and Exchange Commission (“SEC” or “the Commission”) served a subpoena on Covington & Burling, LLP (“Covington”), a multinational law firm headquartered in Washington, D.C. The subpoena sought information relating to a cyberattack on Covington’s information technology systems that had occurred a year prior. Covington largely complied with the subpoena. It balked, however, in one key respect. Citing its ethical obligation to protect its clients’ identities, Covington refused to disclose the names of its nearly 300 public company clients whose files had been compromised by the attack.

The SEC now moves to compel disclosure of the withheld client names. The Commission says it has a legitimate purpose in seeking that information: it is investigating whether there have been violations of the securities laws arising from the cyberattack on Covington’s systems, and the information is necessary to determine (1) whether any illegal trading occurred using material

nonpublic information, or (2) whether any publicly traded issuers failed to make disclosures relating to the cyberattack.

Covington cries foul. It asserts that the SEC’s demand exceeds its investigative authority, as there is no valid purpose in demanding client information where there is no suspicion of wrongdoing by the firm or any client. It also sounds the alarm that, if the SEC’s subpoena is enforced, the Commission will become emboldened to target law firms with greater frequency and serve even more intrusive demands for information.

The court finds some merit to both parties’ positions, but ultimately holds that the SEC’s demand for the names of affected clients does not exceed its statutory authority or cross any constitutional lines. The SEC is not, however, entitled to all affected client names. Its demand is too broad. The agency concedes that it is only interested in the names of those Covington clients whose material nonpublic information was accessed during the cyberattack, and the firm has reported that only a handful of its clients were potentially so impacted. The court therefore will require Covington to disclose the names of the seven clients as to whom it has not been able to rule out that the threat actor accessed material nonpublic information.

Accordingly, as further explained below, the Commission’s application to compel is granted in part and denied in part. II. BACKGROUND A. The Hafnium Cyberattack In November 2020, threat actors exploited vulnerabilities in Microsoft’s Exchange Server software “to gain ‘access to email accounts’ and to install ‘malware to facilitate long-term access to victim environments.’” Opp’n of Covington & Burling to SEC Mot., ECF No. 14 [hereinafter Covington Opp’n], at 7 (quoting Microsoft Security Blog, Hafnium Targeting Exchange Servers

with 0-Day Exploits (Mar. 2, 2021), https://perma.cc/A7EK-6A8Z). Four months later, on March 2, 2021, Microsoft disclosed the cyberattack and “expressed ‘high confidence’ that Hafnium, a group of hackers associated with the Chinese government, had perpetrated the attacks.” Id.

Covington & Burling—a large, multinational law firm based in Washington D.C.—uses Microsoft’s Exchange Server software. Covington Opp’n, Decl. of David Fagan, ECF No. 14-1 [hereinafter Fagan Decl.], ¶ 5. Covington “launched an investigation to determine whether unauthorized parties had gained access to its network” during the Hafnium Cyberattack and “ultimately determined that a threat actor had been able to compromise Covington’s Exchange environment.” Id. ¶¶ 5–6. After learning of the unauthorized access, Covington compiled a list of potentially affected clients and sent them a “very simple message alerting them to that fact and inviting each client to discuss the matter.” SEC’s App. for an Order to Show Cause, ECF No. 1 [hereinafter SEC Mot.], Decl. of W. Bradley Ney, ECF No. 1-1 [hereinafter Ney Decl.], at 38. “Within days of discovering the cyberattack, Covington notified, and began cooperating with, the FBI as part of the firm’s investigation and remediation of the cyberattack.” Fagan Decl. ¶ 7.

As it turned out, over the course of approximately four months, the hackers undertook “a series of malicious activities” against Covington’s computer network, “including stealing credentials and engaging in search, reconnaissance, and export activity.” Id. ¶ 8. Specifically, “[t]he threat actor collected email from certain Outlook accounts and accessed folders on dedicated network drives for a small group of lawyers and advisors whose work or experience related to matters of particular policy interest to the People’s Republic of China.” Id. ¶ 9. “Through its own investigation and its cooperation with the FBI, Covington determined that the threat actor was most likely sponsored by the Chinese government and was very likely engaged in an espionage

campaign to gather information from Covington’s lawyers about the incoming Biden Administration and policy issues of interest to China.” Id. ¶ 10.

B. The SEC’s Investigation On March 6, 2021, roughly a year after Microsoft’s disclosure, the Commission “opened an investigation into possible violations of the federal securities laws” connected to the Hafnium Cyberattack. Ney Decl. ¶ 3. Principally, the SEC sought to determine whether threat actors “accessed and traded on the basis of material, non-public information,” and whether public companies “made materially false or misleading statements, or omitted to state material facts, concerning the impact of the Cyberattack in violation of federal securities laws.” Id. ¶ 5. In early 2022, the SEC learned that “the threat actors were able to gain access to certain client files, including the files of various public companies regulated by the Commission who were either represented by Covington, or about whom Covington possessed information.” Id. ¶ 6.

On March 21, 2022, the Commission issued a subpoena to Covington for records relating to the Cyberattack. Id. ¶ 7. Generally speaking, the subpoena “called for the production of certain documents concerning the threat actors’ access to Covington’s systems, including the identity of any public companies whose files may have been accessed in connection with the Cyberattack.” Id. The subpoena sought ten categories of records. Id., Ex. A at 17–19. Covington produced records or provided narrative responses to nine of the ten requests. Covington Opp’n, Decl. of Gerald Hodgkins, ECF No. 14-2 [hereinafter Hodgkins Decl.], ¶ 16. It objected, however, to Request No. 3. Id. ¶ 18. That demand sought documents and communications sufficient to identify (1) Covington’s impacted clients, (2) the “nature of the suspected unauthorized activity Concerning the client or other impacted party, including when the activity took place and the amount of information that was viewed, copied, modified, or exfiltrated,” and (3) “[a]ny

Communications provided to the client or other impacted party Concerning the suspected unauthorized activity.” Ney Decl., Ex. A at 17–18.

Covington determined that Request No. 3 applied to 298 public company and other SEC-

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