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SecurityNot yet confirmed elsewhere1 publisher3 min readPublished Updated

In an unverified leak, Luna Moth's callers keep victims talking while a partner runs the remote session

Luna Moth's leaked vishing playbook, which has not been verified, coaches callers to keep victims calm while a second operator works their machine, Check Point reported. The method needs no new malware, only a phone call and a legitimate remote-support tool, so the defense sits at the help desk.

The Watch · Security desk

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Law firms: 42 of the group's 50 latest observed victims Who this attack chain reaches and where it can be broken; it runs on phone calls and legitimate remote software the victim starts.

Law firms: 42 of the group's 50 most recently observed victims. Help desks: verify IT callers through an independent channel. IT administrators: limit which remote-support tools can run. Endpoint teams: the leaked material contains no new exploit or malware.

Law firms: 42 of the group's 50 latest observed victims
WhoHowKindClaim
Law firms42 of the group's 50 most recently observed victims were law firmsexposure16
Help desksVerify IT callers through an independent channel, a point where the call-driven chain can be brokendecision25
IT administratorsLimit which remote-support tools can run, since victims start legitimate remote software themselvesdecision25
Endpoint security teamsThe leaked material contains no new exploit and no new malwareconstraint4

What happened

  • An anonymous onion site called The Luna Moth Files posted the material around October 5, 2026, attributing it to Silent Ransom Group, also tracked as UNC3753.
  • The chats describe separate roles for target research and persona building, calling, hands-on remote access, and negotiation and payment handling.
  • The chats track victims under labels such as CHAT, OFFER, CONTRACT and GOLD, alongside revenue estimates and requests for cryptocurrency wallets.
  • Law firms were 42 of the group's 50 most recently observed victims, or 84 percent, by Check Point's count.
  • The leak site shows two different message totals, and its headline financial figure does not match the amounts in its own table.

Why it matters

  • constraint Endpoint malware detection has little to flag when a victim installs a legitimate remote tool on request, so caller verification and limits on remote-support tools are what can stop this group.
  • decision A researched caller on a long-lived domain will pass a name-and-title check, so help desks have to confirm IT callers through a number or channel the organization already holds.
  • exposure Staff at law firms, and at the global top 100 in particular, are the group's stated targets and will be called by people who already hold lists of their senior personnel.
  • precedent If the Fake_Employee concept works, hiring pipelines and front desks become entry points for the same crew, though Check Point found only weak evidence that any placement has succeeded.

The vishing document is the most specific item in the archive. It tells the caller to watch a separate group chat for the whole remote session and to pass on any change in the victim's behavior [10]. From that instruction, Check Point concludes that a second operator is working on the endpoint [10]. "In this workflow, the call acts as a control channel," Check Point wrote [22]. The chats also mention virtual servers set up for 3CX telephony [11].

The tradecraft matches the public record. In 2022, Unit 42 documented the group sending personalized subscription invoices that pointed recipients to attacker-controlled phone numbers [6]. Those calls ended with victims starting remote support sessions on legitimate administration software [6]. Mandiant later described the group impersonating a victim's own IT staff. The cover story was a help-desk issue or a data migration. The tools were screen sharing, legitimate remote administration software and file-sharing services meant for consumers [7]. The leak adds detail on how callers are coached [13]. According to Check Point, the script moves through anxiety, then reassurance, then renewed urgency, and presents remote access as a protective security check [13].

Callers arrive prepared. Early messages discuss long-lived domains, business email accounts and simple commercial-looking websites [12]. Other messages cover registering with commercial services that sell data on individuals, then lists of senior staff and requests for the calling to begin [12]. Check Point's assessment is that the caller ends up with an identity that survives basic scrutiny [23].

Little in this chain looks like malware [25]. SRG generally skips encryption. It persuades people to grant access, steals sensitive data and threatens to publish or sell it [5]. The archive contains no new exploit and no new malware [4]. The remote session runs on legitimate software that the victim starts because the caller asked [6]. On this evidence, the chain can be broken at two points. Staff can confirm an IT caller through a channel the caller did not supply, and the organization can limit which remote-support tools run on staff machines [25].

The chats state the legal focus outright. Participants refer repeatedly to the legal sector and to an ambition to target the top 100 law firms in the world [15]. Across Check Point's broader victim dataset, Business Services accounts for 69 classifications, Finance for 22 and Real Estate for two [17].

The callback and IT-impersonation pattern is documented in Unit 42 and Mandiant reporting [6][7]. The leak's origin is unknown. The package holds chat exports, a vishing document, screenshots and a purported resume [2]. Nobody knows who posted it or how the archive was obtained, and Check Point treats its claims as unverified until independent sources back them up [3]. Claims about operator identities, confirmed payments and deepfake use still need that corroboration, according to Check Point [21].

The same caution applies to activity beyond the phone. The chats discuss recruitment, prospective agents and a project called "Fake_Employee," and the site lists a purported resume sent to law firms [18]. Check Point rates the evidence as strongest for internal discussions and project concepts and weaker for any successful placement of a fake employee [19]. Separately, the FBI has reported that impostors claiming to be IT staff tried to get in physically once their remote attempts had failed [8].

What to watch

  • Independent confirmation of the archive from Unit 42, Mandiant or the FBI, especially on operator identities and confirmed payments.
  • Evidence that a Fake_Employee placement succeeded inside a law firm.
  • Changes to SRG's pretexts or phone infrastructure, including the 3CX servers named in the chats, after the leak.

Clarity's read

What the record supports and how the coverage leans. The claims behind it follow.

Reality

Evidence40
Adoption
Insufficient
Hype gap+10
Incentives60
Confidence45
Why these scores

Claim ledger

Ranked by verification strength, evidence, and original report placement.

  1. [1]

    Around October 5, 2026, an anonymous onion site called "The Luna Moth Files" claimed to expose internal material from Silent Ransom Group (SRG), also tracked as Luna Moth and UNC3753.

    ReportedSupportedView cited source
  2. [2]

    The leaked package includes chat exports, a vishing document, screenshots, and a purported fake employee resume.

    ReportedSupportedView cited source
  3. [3]

    Nobody knows who published the leak or how the archive was obtained; Check Point treats its claims as unverified unless independent sources back them up.

    ReportedSupportedView cited source

Sources

1 independent publisher whose own reporting we read for this story.

  1. blog.checkpoint.com

    1 article · October 9, 2026

    How Luna Moth Runs Data Extortion Like a Business

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