Wallstreet Ransomware: Attacks, Detection, and Recovery

Wallstreet ransomware is a double-extortion group that has named organizations on its leak site since late June 2026 and threatened to publish their data. Only one of them, a Louisiana clinic, has publicly tied an attack to the group, and that attack encrypted files and systems throughout its network. With no public analysis of Wallstreet's encryptor, most details of the incidents come from the listed organizations' own disclosures.

Contact Proven Data's incident response team if Wallstreet has attacked or listed your organization.

Wallstreet ransomware at a glance

What is Wallstreet ransomware?

Wallstreet is a ransomware group known mainly through its Tor leak site, which trackers first recorded in late June 2026. Who runs the group, where it is based, and whether it uses affiliates remain unknown. By November 2026, no government agency had issued an advisory on the group, and no public reporting had linked it to an earlier ransomware group.

Most of Wallstreet's listings came in batches, with the bulk in September and October. The latest appeared on October 30. An earlier gap between listings, in July and August, lasted about five weeks before they resumed.

Wallstreet's first listing, Omax Autos, reused text from a Leak Bazaar entry and linked back to it. Leak Bazaar is a marketplace that resells data from failed ransom negotiations. Omax, an Indian auto components maker, had disclosed a ransomware attack on its IT infrastructure on March 27, 2026, three months before Wallstreet's site appeared. No public evidence shows that Wallstreet itself held the Omax data.

Which Wallstreet ransomware attacks have been confirmed?

As of November 2026, Louisiana's Green Clinic is the only organization Wallstreet has listed that ties its incident to the group. Several other listed organizations have disclosed incidents in their own notices or regulator filings without naming an attacker, and healthcare organizations make up the largest share of them. For most listed organizations, no public statement has been found.

At least two listed organizations, including Omax Autos, had already been claimed elsewhere before Wallstreet's site went up. Most listing descriptions read like short company profiles built from public information, and their data categories come from the same limited set of labels, so they say little about what was taken.

Victim listings on ransomware leak sites represent unverified claims made by the threat actor. Treat them as unconfirmed unless company disclosures, SEC filings, regulatory notifications, or law enforcement confirm them.

Each entry below outlines what the organization itself reported, from the firmest confirmation to the weakest.

• Green Clinic (Ruston, Louisiana). Its cybersecurity incident update of October 8 links the attack to a threat actor "identifying itself as 'Wall Street,' or an affiliate thereof," and says the attack "encrypted files and systems throughout our network." Wallstreet listed the clinic six days later and linked to that update, so the clinic named the group before the listing appeared. Green Clinic has not said whether patient data was taken.
• Bristol City Council (England). The council's school IT cyber incident page says that stolen data from the schools' IT network it runs has been published online and that approximately 320,000 files may have been taken.
• Gibson Area Hospital & Health Services (Gibson City, Illinois). Its data security event notice says a forensic investigation found that unauthorized actors copied files over two days. The files could include diagnoses, lab results, and medical record numbers.
• Prism Medical Products (Elkin, North Carolina). Prism's information security incident notice says an unauthorized party "appears to have accessed and obtained certain files," which may include Social Security numbers and medical and health insurance information.
• Cedar County Memorial Hospital (El Dorado Springs, Missouri). The hospital shut down its networks and has not said whether patient information was affected. It does not name Wallstreet. A patient's proposed class action against the hospital, filed in Cedar County Circuit Court on September 9, does.
• Town of Andover (Massachusetts). The town confirmed unauthorized access to certain systems and is still checking files for information protected under state law.
• Danvikshem (elder care home in Nacka, near Stockholm). Its IT provider, which hosted its servers, suffered an intrusion. The personal identity numbers of residents and employees, and employees' bank account numbers, may have been accessible. No copying has been confirmed.

Three other listed organizations have not publicly described an incident but appear in regulator filings. Baraga County Memorial Hospital in Michigan reported a hacking/IT incident to the HHS Office for Civil Rights in August. Goldston Oil Corporation of Houston, whose name and city match the listing, reported a breach affecting 412 Texans to the Texas Attorney General. America's Food Basket notified Massachusetts regulators. None of the three mention ransomware.

How soon after an attack does Wallstreet ransomware post a listing?

Across seven incidents detected from August to October 2026, Wallstreet's leak-site listings came four to 36 days after detection.

The table covers every listed organization that has reported a detection date for an incident since Wallstreet's site appeared. Listing dates are when trackers first recorded each listing. Bristol's date is when the council says it first suspected the attack, four days before it disconnected the affected schools. Danvikshem's date is when it learned of its IT provider's breach. Seven cases are too few to predict when a new listing will appear.

A Wallstreet leak-site listing can be the first public sign that an organization's data was stolen. Prism and Gibson made no public statement until after their listings. Goldston Oil's breach notice appeared 22 days after its listing, and America's Food Basket's notice is dated 40 days after its listing.

The other organizations in the table disclosed an incident before their listings. By then, only Bristol had also confirmed that some data was taken. On October 15, the council's cyber incident update reported records taken from one school's separate system but no evidence of mass data export from the schools' IT network. The council learned of the theft from that network on October 30, three days after Wallstreet listed it.

What happens after Wallstreet ransomware lists an organization?

A Wallstreet listing threatens to publish the organization's data, sometimes with a countdown timer. According to a report on the Cedar County hospital's IT shutdown, its listing showed the countdown at zero and provided access to a browsable set of files whose authenticity has not been verified.

Not every listing stays up: three listings that trackers had recorded, including Green Clinic's, had disappeared from Wallstreet's leak site by November 11, and the reason is not public.

Does Wallstreet ransomware encrypt files?

Wallstreet ransomware has encrypted files in the one case where the organization itself names the group. At Green Clinic, network-wide encryption cut staff off from many electronic systems, including patients' medical records.

None of the other listed organizations that have described their incidents confirm encryption. They report shutdowns, rebuilds, and restores from backup, which can happen without encryption. Gibson Area Hospital describes only file copying.

Bristol City Council comes closest. The council's November 11 decision on its cyberattack response says the incident included "a successful ransomware attack," but does not name the attacker or say whether files were encrypted. It is unknown whether Wallstreet encrypts in every attack.

As of November 2026, no public sample of the Wallstreet encryptor has been reported. Its encrypted file extension, encryption algorithm and key scheme, and any Linux or ESXi build remain undocumented, and no vendor has published a technical analysis. Searches for the name in public malware repositories turn up WallStealer, a similarly named information stealer first submitted in November 2025, not a Wallstreet encryptor.

What is known about the Wallstreet ransom note?

Public evidence of a Wallstreet ransom note comes down to one photo of an on-screen message headed "Wallstreet Ransomware." It was taken in September 2026 in a computer lab at a university in Salvador, Brazil (Universidade Católica do Salvador, UCSal). A local newspaper published it in its report on the UCSal attack.

Only the message itself names the group, and Wallstreet's leak site does not list the university. The Catholic University of El Salvador, listed later that month, is a different institution in another country.

The message claims the attackers locked computers and servers and fully dumped SQL databases. It threatens to publish a database of students and professors and points readers to readme.txt files. It shows no Tox ID, amount, deadline, or file extension, and the contents of the readme.txt files are unknown.

The university describes a contained attempt at unauthorized access. A coordinator quoted by the newspaper wrote that, to their knowledge, no system had been accessed and no data compromised beyond the infected lab machines. No source says whether files on those machines were encrypted.

The message appears to be a Windows logon message, the legal notice Windows shows before sign-in, though one photo cannot rule out a full-screen locker window. Pysa ransomware and Kangaroo ransomware also showed their ransom notes as logon messages.

How does Wallstreet ransomware get into a network?

No organization listed by Wallstreet has yet disclosed how the attackers first gained access, and the Town of Andover has said it will not. Danvikshem offers the only public lead; its incident came through a breach at its IT provider.

Wallstreet listed Danvikshem on October 13 in a batch of 11, ten of them Swedish. Public DNS records checked on November 11 showed that five of those ten organizations had mail or VPN hosts pointing to an IP address range registered to one IT company. That pattern fits an attack through a shared IT provider, but no one has confirmed it, and the provider has not been named.

The rest of the attack chain is unknown: how the attackers took data and whether they moved laterally, escalated privileges, bypassed EDR, deleted shadow copies, or established persistence. The CVEs, RDP access, and phishing that automated threat intelligence profiles list as Wallstreet's entry points are not tied to any incident.

How can you detect Wallstreet ransomware?

The only behavioral detection drawn from Wallstreet evidence so far rests on one unconfirmed case: a ransom message that appears to have been set as the Windows logon message.

Watch the LegalNoticeCaption and LegalNoticeText values under these registry keys:

• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
• HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Sysmon Event ID 13 captures the changes if your configuration covers these keys. Alert when the text differs from your approved logon message, whichever process wrote it, and review Group Policy changes that set these values.

Keyword matching is not enough. The public Sigma rule for ransomware LegalNotice messages looks for "encrypted," "Unlock-Password," and "paying," none of which appear in the message photographed at the Brazilian university. The rule also does not monitor the Winlogon path, where Kangaroo ransomware wrote its message.

Wallstreet ransomware TTPs

What is documented about Wallstreet and the organizations it has listed maps to these MITRE ATT&CK tactics and techniques:

Wallstreet ransomware IOCs

Publicly known Wallstreet indicators as of November 2026 are few: two Tor addresses, a Tox ID, and strings from the one on-screen message. No file hashes, email addresses, cryptocurrency wallets, command-and-control servers, or YARA rules have been published. Onion addresses rarely appear in ordinary proxy logs. For threat hunting, search endpoint telemetry, email, and help desk tickets for the Tox ID and the address fragments below.

A third address that one tracker lists for Wallstreet belongs to Leak Bazaar, the marketplace whose entry the group's first listing copied, and is not a Wallstreet indicator.

What to do if Wallstreet ransomware hits or lists your organization

If Wallstreet ransomware hits or lists your organization, call in Proven Data's emergency incident response and bring in breach counsel the same day.

Then take these five steps:

• If you are listed but see no attack, verify the listing. Have your incident response team check what the listing shows, and ask IT providers that hold your data whether they have been breached.
• Isolate first, then preserve evidence. Prism Medical Products disabled remote access and reset credentials or disabled certain management and service accounts. Green Clinic and Cedar County halted their own networks. Where possible, isolate affected hosts from the network rather than power them off, since powering off erases memory evidence. Isolate backups and preserve ransomware evidence before wiping or rebuilding anything.
• Treat your IT provider as part of the incident. If the attack may have come through an IT provider, as at Danvikshem, suspend the provider's remote access and ask for its findings and logs on your systems. A GDPR processor or a HIPAA business associate must report a breach to you, but you remain responsible for notifying regulators and affected individuals. Danvikshem reported to Sweden's regulator itself.
• Capture the logon message before reimaging. If a ransom message appears at sign-in, export the LegalNoticeCaption and LegalNoticeText values and the key's last-write time, which changes whenever any value in that key changes. Where a domain Group Policy object sets them, back up the object as evidence, then remove the setting from it, or the message will return. Such a setting also means the attackers could edit domain Group Policy, so check other recently changed objects.
• Prepare notifications without waiting for a listing. An early review that finds no evidence of mass data export does not rule it out, as Bristol City Council's case shows. A plaintiffs' firm invited Gibson's patients to come forward the day after the listing, a month before the hospital's own notice. A patient filed a proposed class action against Cedar County Memorial Hospital 26 days after its outage began.

The Town of Andover, Massachusetts, brought in breach counsel and a forensic firm on the evening of August 13, according to records on the town's first-night hires. That was the day its outage began and eight days before it publicly confirmed a cyberattack. The law firm was to coordinate the forensic work, assess notification duties, help with public communications, and work with law enforcement.

The town notified its insurer within days. It says its cyber insurance policy gave it access to forensic, legal, and network-restoration specialists and that the insurer pays them directly.

Nearly three months after the attack, on November 9, Andover said staff and outside firms were still reviewing files one by one for personal information. That is because many of the files are PDFs rather than searchable spreadsheets. The town could not say when it would send any notifications.

Which breach notification deadlines apply?

Notification clocks differ across the listed organizations. HIPAA requires notifying affected individuals without unreasonable delay and within 60 days of discovering a breach. Discovery is the first day any of the organization's workforce members or agents, other than the person who committed the breach, knew or reasonably should have known of it. Only a law enforcement request can extend the 60-day limit.

Under HIPAA, ransomware encryption of unsecured protected health information is presumed to be a breach unless a documented risk assessment shows a low probability that the data was compromised. The presumption does not require proof that data left the network. Notice then goes to patients, to HHS and, if more than 500 residents of a state or jurisdiction are affected, to prominent media outlets serving it.

In the US, each state has its own breach notification law, with different deadlines and thresholds, so one breach can trigger several states' laws at once. In the UK and the EU, GDPR requires notifying the regulator without undue delay and, where feasible, within 72 hours of becoming aware of a breach, unless it is unlikely to put people at risk. Details can follow in phases.

Can files encrypted by Wallstreet ransomware be recovered?

No public decryptor for Wallstreet ransomware exists as of November 2026. Without a decryptor, file recovery depends mainly on backups, shadow copies, or anything else the attackers did not reach. Some ransomware encrypts only part of each file, which can leave some data recoverable, but no public analysis shows whether Wallstreet does.

Green Clinic, the only listed organization to confirm encryption, has not said whether it has restored its old records. Andover, Prism, and Cedar County do not mention encryption. The four organizations' own statements and records show how far each brought systems back and how long recovery can take:

Beyond Prism's credential resets, none of the four describe how they restored or rebuilt Active Directory or other identity systems.

Magdy Abdelaziz, Proven Data's Head of DFIR, explains what makes a recovery take weeks:

The real bottleneck in the weeks-long cases is almost never data restoration. It's trust.

He points to unproven eradication, untested backups, and decision latency, where "insurance approval cycles, counsel review, and executive indecision consume more wall-clock time in many cases than any technical task."

Should you pay the Wallstreet ransom?

Whether paying Wallstreet would bring a working decryptor is unknown. Andover said in writing that it did not make or authorize any payments in connection with the incident. Bristol City Council says it has not paid and does not intend to pay a ransom. Neither has said whether it received a demand, and no listed organization has reported a ransom amount or a payment.

Wallstreet's only known contact channel is Tox Chat; no negotiation portal has been seen. The group and its Tox ID do not appear on OFAC's SDN list as of November 11, 2026. Because no one behind Wallstreet has been identified, a clean screening cannot show who would receive a payment.

OFAC's guidance on the sanctions risks of ransomware payments says a payer can be held civilly liable without knowing, or having reason to know, that the payment violated sanctions. That applies to anyone subject to US jurisdiction, including firms that facilitate a payment. The same guidance treats a prompt and complete report to law enforcement or CISA as a significant mitigating factor.

DO NOT PAY THE RANSOM. Ransomware payment decisions carry legal, operational, and financial consequences, including potential OFAC sanctions exposure, and should be assessed with qualified legal counsel and an incident response team before deciding whether to engage with or pay the threat actor. That assessment must not delay containment, evidence preservation, required reporting, or recovery.

To restore systems without paying, contact Proven Data's ransomware data recovery team.

Security checklist

1. IT provider access. Give IT providers only the access they need, with MFA on every remote session, credentials unique to your environment, and time-limited, logged access. If a provider hosts your servers, hold it to the same controls and keep a backup copy outside its reach. Danvikshem's incident came through the provider that hosted its servers.
2. Restorable backups. Keep frequent backups the attackers cannot reach, with separate credentials and on offline or immutable storage. Rehearse restoring them into a clean environment, including rebuilding Active Directory and resetting privileged and service accounts. Prism's rebuild in a separate environment from trusted backups is the closest example in these cases.
3. Bulk-export alerts. Alert on large or unusual outbound transfers and archive creation on file servers and databases, and be ready to block their outbound traffic without waiting for a change window. Gibson noticed suspicious activity on September 2, and its files were copied that day and the next.