Victim Claim
CHECKMARX
Claimed by
lapsus$
Listed on leak site
25 Apr 2026
Reported attack date
24 Apr 2026
Group claims tracked
7
Unverified claim.
This entry reproduces a listing published by the lapsus$ group on its own extortion site.
Attackers routinely exaggerate or fabricate victims. Nothing here confirms that
CHECKMARX suffered a breach, or what data was actually taken.
About the organisation
Source Code, Employee DB, API Keys, MongoDB/MySQL Creds
What the listing means
CHECKMARX appeared on the lapsus$ leak site on 25 April 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated — the attack itself is dated 24 April 2026, 1 day before the listing. This group has not published new claims in the last 30 days.
Recommended actions
- Treat any unsolicited message referencing CHECKMARX as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on checkmarx.com, 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 — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/Q0hFQ0tNQVJYQGxhcHN1cyQ=