Malicious VietCredCare Credential Exfiltration Staging Files

ATT&CK techniques

Cred Access

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

What it detects

This rule detects staging files created by the VietCredCare stealer using its distinctive COMPUTERNAME--COOKIES-.txt and --PASS-.txt naming pattern. These files hold stolen browser cookies and passwords prior to exfiltration to a Telegram channel. Their presence indicates active credential harvesting on the host.

Reporting behind it

Related detections9 linkedT1555.003 — drag to rearrange

Suspicious Non-Browser Access to Chromium Credential Stores

Suspicious Chrome Launch with Remote Debugging for Credential Theft

Suspicious Access To Chrome Elevation Service COM Object via Katz Stealer

Suspicious Chrome Launched With Remote Debugging Port For Cookie Theft

Suspicious Data Exfiltration Channel to Telegram or Discord via dns_query

Suspicious Named Pipe ChromeDecryptIPC Used by Stealer (via pipe_created)

Suspicious Clipboard Data Access via Get-Clipboard (BeaverTail OtterCookie)

Malicious Edge Credential Parser Execution via PowerShell (via process_creation)

SapphireStealer Working Directory File Drop in Temp

Malicious VietCredCare Credential Exfiltration Staging Files

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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