H3XAOperational intelligence
Live analytical pictureEvidence before assessment
TypeMalware
External ID—
First seen2026-08-14
Last seen2026-08-14

Confidence

—

[CALENDAR](https://attack.mitre.org/software/S0025) is malware used by [APT1](https://attack.mitre.org/groups/G0006) that mimics legitimate Gmail Calendar traffic. (Citation: Mandiant APT1)

Labels

malware
3 recorded

Relationships

uses
from APT1
Group
usesTechnique
2 external

References

mitre-attack
S0025
open
Mandiant APT1
https://www.fireeye.com/content/dam/fireeye-www/services/pdfs/mandiant-apt1-report.pdf
open