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YIIX103

YIIX103 is a threat actor group, tracked by Brandefense. It targets the Government, and Retail and Consumer sectors in Indonesia and Argentina. It uses 2 MITRE ATT&CK techniques.

Techniques
2
Exploited CVEs
No CVE data
First seen
Oct 31, 2026
Last seen
Oct 31, 2026
Record updated

Who They Target.

How They Operate · MITRE ATT&CK.

2 techniques across 2 of 14 tactics

Reconnaissance·

Resource Development·

Initial Access·

Execution·

Persistence·

Privilege Escalation·

Defense Evasion·

Credential Access·

Discovery1

T1491
Defacement

Lateral Movement·

Collection·

Command and Control·

Exfiltration·

Impact1

T1491.002
Defacement: External Defacement

About YIIX103.

Defaced the index page of the Indonesian Administrative Court PTUN Semarang in a single targeted defacement with no team affiliation reported.

Last updated Nov 5, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.