Settra Ransomware Decryption & Data Recovery

Settra (written SETTRA in some vendor material) became publicly visible in June 2026. The first batch of leak-site victims went up between 26 and 28 June, with the earliest traceable intrusion dated to early that month. The crew states plainly that its motive is money, that it targets no particular country or sector, and that it simply picks organisations with weak patching and loose credential management.

By early September 2026 the leak site had named roughly 64 organisations across 18 to 19 countries. The United States dominates, followed by Germany, the UK and Canada, with Asian victims in Taiwan, South Korea and Singapore. Sector breakdowns differ by tracker, with technology, professional services, manufacturing, construction, retail and e-commerce, and healthcare all near the top. On 28 June 2026 the leak site named a domain belonging to Taiwan's PChome group, in a post centred on its payment business - the most-watched Chinese-language case so far. Which entity was actually affected, how much data was taken and how many users were involved should be read from the company's and the regulator's own statements rather than from the figures the operators assert. In late August it named US telecoms carrier Zayo Group and fleet-management vendor Zonar Systems.

Public information on Settra remains limited, and that has to be stated plainly. No encryptor sample attributed to the group has been publicly analysed, and neither an encryption extension nor a ransom note filename is on record. Assessments also diverge: incident-response firm MOXFIVE describes hands-on cases in which data was stolen and systems encrypted, while WatchGuard classifies the group outright as a "data broker" and Proven Data notes that encryption's role has never been confirmed by public malware analysis. No public reporting links Settra to an existing family or rebrand, and its scale suggests a small team or even a lone operator rather than a mature RaaS. This page carries only what public sources support.

There is no reliable extension to key on. Settra's encryption extension and ransom note filename are not documented in public sources, so family attribution cannot rest on the suffix. If someone asserts Settra purely from a file extension, ask what sample evidence backs it.

Indicators that are actually usable:

• Negotiation runs over Tox, with a 76-character hexadecimal Tox ID supplied in the note or attacker messaging. No email address is offered.
• The crew runs an onion leak site branded Settra, alongside a separate negotiation chat portal and several onion file servers.
• Posting style is distinctive: instead of a short entry plus a download link, each victim gets a long-form, investigative-report-style article narrating the intrusion and the contents of the stolen data, with a countdown timer and revenue estimates attached to maximise reputational pressure.
• On hosts, expect Mesh Agent remote-management installs, cleared Windows event logs, and artefacts from NetExec, PAExec, ProcDump and Mimikatz.

Bottom line: corroborate across the leak-site listing, the Tox contact and the host-side toolchain rather than relying on any single indicator.

Settra's access playbook leans almost entirely on ready-made credentials - unsophisticated but effective:

• Stolen credentials and infostealer logs. Public tracking finds that around half of known victims had a confirmed infostealer infection, which the operators use to log in directly.
• VPN accounts and valid-account abuse. MOXFIVE confirmed in live cases that stolen VPN credentials provided the foothold, with legitimate domain accounts used for lateral movement. This is the only initial-access route currently backed by published incident-response work; phishing, exploitation and other vectors have no public evidence behind them for this group.
• Internal discovery with NetExec (nxc) and Netscan for asset and share enumeration.
• Credential access via ProcDump and Mimikatz against LSASS.
• Lateral movement and persistence using PAExec for remote execution and the legitimate Mesh Agent remote-management tool as a long-term channel.
• Defence evasion through a tool named edr_blind and a BYOVD technique - the vulnerable driver STProcessMonitor_v114.sys - to gain kernel-level suppression of endpoint protection, followed by manual clearing of Windows event logs.

The practical lesson: VPN without MFA, browser-stored passwords leaking from personal devices, and management interfaces reachable by any authenticated account are the three gaps this chain reuses most often.

Encryption behaviour has not been publicly analysed. No encryptor sample attributed to Settra has been reverse-engineered in public, so the algorithm, whether encryption is intermittent, whether databases or hypervisors are targeted, and whether shadow copies are deleted cannot be stated verifiably. MITRE mappings include T1486 (Data Encrypted for Impact) and some incident records describe encrypted systems, but no published sample backs this up.

Exfiltration is the confirmed half. Large-scale file theft precedes publication, with claimed volumes per victim ranging from tens of gigabytes into the terabyte range - all figures asserted by the operators and not independently verified. Data leaves over C2 and common web services, and the leak site releases it in stages against a countdown.

What this means operationally: until a sample is analysed, do not assume from experience with other families that files are only partially encrypted and therefore repairable. Encryption scope, backup damage and shadow-copy status all have to be measured on site, item by item.