GRILLMARK
Aliases: Hellsing Backdoor
- First seen
- 2014-03-01 00:00:00
- Malware type
- backdoor
- Family
- Malware family
- Profile updated
- 2026-07-07 12:39:33
Targeted industries: government-and-public-sector technology-and-telecommunications
Targeted regions: country_code:my country_code:ph
Context
This is a proxy-aware HTTP backdoor that is implemented as a service and uses the compromised system's proxy settings to access the internet. C&C traffic is base64 encoded and the files sent to the server are compressed with aPLib.
Detection coverage
- 1 YARA rules
Detection rules
- MALPEDIA_Win_Grillmark_Auto (yara-rule)
Reports & references
- Kaspersky — 69567 (report)
- malpedia.caad.fkie.fraunhofer.de — Win.Grillmark (report)
- Mandiant — Rpt M Trends 2019 (report)