Malware

InboxSetupPro

For your environment

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MITRE ATT&CK

Techniques & procedures

6 distinct techniques documented for this family, organized by ATT&CK tactic.

Execution

1 technique

T1204User ExecutionEvidence1

The user followed the Pastebin instructions: extracted the archive to C:\ProgramData\InboxCorePro\, imported InboxCorePro.reg via regedit.exe, and placed a launcher in the Startup folder.

Collection

3 techniques

T1005Data from Local SystemEvidence1

This specific framework, known as InboxSetupPro, targets local storage directories recursively.

T1213Data from Information RepositoriesEvidence1

The script explicitly targets local communication data caches to exfiltrate private corporate chats. For example, the tool extracts records from the local Signal folder path.

T1560Archive Collected DataEvidence1

File system za / tz / z ZIP directory, ZIP single file inline, extract ZIP (with optional password)

Exfiltration

2 techniques

T1567Exfiltration Over Web ServiceEvidence1

The tool, which TRU identifies as InboxSetupPro ... uses OneDrive rather than Google Drive for exfiltration.

T1567.002Exfiltration to Cloud StorageEvidence1

...the file “is distinct from Nimbus RAT and uses OneDrive rather than Google Drive for exfiltration.”

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app

security online infoNews

Jun 4, 2026

Microsoft Teams Vishing Attack Drops Nimbus RAT

A secondary data theft utility used post-compromise to recursively target local storage, exfiltrate data via OneDrive, and steal communications data including Signal attachments and offline email archives.

esentire blogNews

May 28, 2026

Nimbus RAT: How Threat Actors Are Abusing Microsoft Teams and Google Drive to Deploy a Java RAT | eSentire

Distinct second-stage tool observed in at least one confirmed victim after Nimbus RAT. It uses OneDrive for exfiltration and was configured to collect Signal Desktop attachments and likely exfiltrated an Outlook OST mailbox archive.

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IOC matching

Match every observed IP, domain, and hash against your live telemetry.

Threat actor attribution

Named campaigns wielding this family, with evidence pinned to each claim.

Exploited vulnerabilities

CVEs this family uses for access and lateral movement.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

MITRE ATT&CK mapping6

Every documented technique, ranked by evidence weight.

Researcher chatter

Reddit, Mastodon, and CTI community discussion around this family.