Probe Test System
โ Listed in the last 48hAbout the organisation
ptse.com.tw Probe Test System Corp. (PTS, ็พค้ ้ปๅญ) is a Taiwanese semiconductor back-end (OSAT) service provider operating since 2000, with plants in Zhunan and Toufen, Miaoli County (the former Hsinchu site was consolidated into Toufen in Q1 2024). Its services cover System Level Test (SLT), wafer chip probing (CP) on Chroma, ASL1000 and CTA8280 platforms, IC marking/remarking, Tape & Reel packaging (capacity ~150 KK units/month) plus lead/ball scan inspection. Long-term customers include Taiwan's leading chipmakers: Winbond, MediaTek, Novatek, Nuvoton and Macronix. The company is certified under ISO 9001, ISO 14001 and ANSI/ESD S20.20-2021.
ShellCodeX evidence assessment
Strong record ยท 85/100. Strong record completeness based on identity, context and retained source evidence. This score does not verify the attacker's allegation.
- A plausible organisation domain is attached to the claim.
- The record includes organisation-specific context rather than only a victim name.
- Country attribution is available for geographic context.
- Sector classification supports peer-risk comparison.
- A source listing reference is retained for traceability.
What the listing means
Probe Test System appeared on the thegentlemen leak site on 30 August 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated โ the attack itself is dated 28 August 2026, 1 day before the listing. This group has published 139 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Probe Test System as suspicious โ leaked data gets weaponised for phishing within days.
- If you hold an account on ptse.com.tw, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Other Technology organisations should review this group's known TTPs and validate detection coverage against them.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach โ check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/UHJvYmUgVGVzdCBTeXN0ZW1AdGhlZ2VudGxlbWVu