Pepijn van der Stap
Also known as Umbreon
Reports
4
First seen
Sep 28, 2026
Last seen
Oct 9, 2026
Motivation
Financial
Relationships
Filled ◆ = CVE exploited in the wild. Entities that appear together in Signalis reporting — co-mention, not confirmed collaboration. Reports naming many actors at once (weekly roundups) are excluded from relationship edges.
Targeting
Sectors
Victim regions
×1×3
United States×3
Netherlands×1
Victim country, only when stated. Corpus is predominantly English-language reporting, so US/EU coverage is overweighted relative to true victim distribution.
Top ATT&CK techniques
T1005 Data from Local System ×2T1190 Exploit Public-Facing Application ×2T1110.004 Brute Force: Credential Stuffing ×1T1078 Valid Accounts ×1T1566.004 Phishing: Spearphishing Voice/Call ×1T1041 Exfiltration Over C2 Channel ×1T1021 Remote Services ×1T1486 Data Encrypted for Impact ×1T1567 Exfiltration Over Web Service ×1T1567.002 Exfiltration Over Web Service: Exfiltration to Cloud Storage ×1
Indicators
cve ×1url ×1
Indicator values are available on Pro and via the API.
Associated CVEs
Recent reports
Critical