Suspicious Termination of Telegram Desktop Prior to Session Theft

ATT&CK techniques

Cred Access → Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1555.003Credentials from Web Browsers
Discovery
Lateral Movement
Collection
- T1005Data from Local System
C2
Exfiltration
Impact

What it detects

This rule detects a taskkill command forcibly terminating the Telegram desktop client. The Arkanix stealer kills Telegram.exe before copying its tdata session folder so the locked files can be stolen and used for account takeover as reported by Kaspersky. Forced termination of Telegram by a non-interactive process is a strong precursor to messaging session credential theft.

Reporting behind it

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Suspicious Termination of Telegram Desktop Prior to Session Theft

Pivot detection · T1555.003 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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