VoidStealer: Debugging Chrome to Steal Its Secrets
Essential information
- Published
- 20/03/2026 10:51
- Modified
- 20/03/2026 21:18
- Source / Author
- AlienVault
- Confidence
- 100/100
- Report type(s)
- threat-report
- Labels / Tags
- abe bypass chrome debugger-based technique edge hardware breakpoints infostealer memory analysis v20_master_key extraction voidstealer
- Tags
- 2026-03-20 abe bypass chrome debugger-based technique edge hardware breakpoints infostealer memory analysis v20_master_key extraction voidstealer
- Related entities
- 1 indicators, 1 observables, 1 intrusion sets (apt), 1 malware
Description
VoidStealer is an emerging infostealer that employs a novel debugger-based Application-Bound Encryption (ABE) bypass technique. This method leverages hardware breakpoints to extract the v20_master_key directly from browser memory, requiring neither privilege escalation nor code injection. The technique involves attaching to the browser process as a debugger, setting breakpoints at strategic locations, and extracting the key when it's briefly present in plaintext. This approach offers a lower detection footprint compared to alternative bypass methods. The blog post dissects the technique step-by-step, from locating the target address for breakpoint placement to extracting the key. It also provides detection strategies for defenders, focusing on monitoring debugger attachments and suspicious browser memory reads.