The ThreatFox: StrelaStealer IOCs rule detects potential credential-stealing activity associated with the StrelaStealer malware, which exfiltrates sensitive user credentials and data. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage compromises before data exfiltration occurs.
IOC Summary
Malware Family: StrelaStealer Total IOCs: 19 IOC Types: domain
| Type | Value | Threat Type | First Seen | Confidence |
|---|---|---|---|---|
| domain | casadasaguas.ufes.br | payload_delivery | 2026-04-24 | 100% |
| domain | carritech.dfk-ms.info | payload_delivery | 2026-04-24 | 100% |
| domain | carrascotransportesymas.com | payload_delivery | 2026-04-24 | 100% |
| domain | cario.gr | payload_delivery | 2026-04-24 | 100% |
| domain | canhkinhvietnhatshome.com | payload_delivery | 2026-04-24 | 100% |
| domain | camscocare.co.uk | payload_delivery | 2026-04-24 | 100% |
| domain | bydrealestate.com.au | payload_delivery | 2026-04-24 | 100% |
| domain | business.adalinki.com | payload_delivery | 2026-04-24 | 100% |
| domain | bursaforum.net | payload_delivery | 2026-04-24 | 100% |
| domain | bsblink.com.br | payload_delivery | 2026-04-24 | 100% |
| domain | bosquedocerrado.com.br | payload_delivery | 2026-04-24 | 100% |
| domain | www.wildnor.com | payload_delivery | 2026-04-24 | 100% |
| domain | auto-shopping.l0gik.com.br | payload_delivery | 2026-04-24 | 100% |
| domain | atmconstruct.com | payload_delivery | 2026-04-24 | 100% |
| domain | www.jejaringsumsel.com | payload_delivery | 2026-04-24 | 100% |
| domain | appraisal.ge | payload_delivery | 2026-04-24 | 100% |
| domain | app.esinfinitamentereciclable.com | payload_delivery | 2026-04-24 | 100% |
| domain | apmotopart.com | payload_delivery | 2026-04-24 | 100% |
| domain | apgmja.pk | payload_delivery | 2026-04-24 | 100% |
// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - StrelaStealer
let malicious_domains = dynamic(["casadasaguas.ufes.br", "carritech.dfk-ms.info", "carrascotransportesymas.com", "cario.gr", "canhkinhvietnhatshome.com", "camscocare.co.uk", "bydrealestate.com.au", "business.adalinki.com", "bursaforum.net", "bsblink.com.br", "bosquedocerrado.com.br", "www.wildnor.com", "auto-shopping.l0gik.com.br", "atmconstruct.com", "www.jejaringsumsel.com", "appraisal.ge", "app.esinfinitamentereciclable.com", "apmotopart.com", "apgmja.pk"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses, QueryType
| order by TimeGenerated desc| Sentinel Table | Notes |
|---|---|
DnsEvents | Ensure this data connector is enabled |
Scenario: Legitimate Scheduled Job Execution
Description: A system administrator schedules a legitimate script (e.g., PowerShell.exe or task scheduler) to run at specific intervals, which may include network communication or file access that matches the detection logic.
Filter/Exclusion: Exclude processes initiated by the Task Scheduler with known legitimate scripts (e.g., C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe with command-line arguments matching scheduled job definitions).
Scenario: Admin Tool Network Communication
Description: An administrator uses a legitimate tool like PsExec or Powershell Remoting to remotely manage systems, which may involve outbound network traffic that resembles malicious behavior.
Filter/Exclusion: Exclude traffic originating from known admin tools (e.g., PsExec, Powershell Remoting) or processes running under the Administrators group with known legitimate command-line arguments.
Scenario: Data Backup or Sync Process
Description: A backup tool (e.g., Veeam, Acronis, or rsync) transfers data between servers, which may involve file access or network communication that triggers the rule.
Filter/Exclusion: Exclude processes associated with backup tools (e.g., veeam.exe, rsync.exe) or network traffic between known backup servers and storage systems.
Scenario: Software Update or Patch Deployment
Description: A patch management tool (e.g., Microsoft Update, WSUS, or Ansible) may perform network operations or modify system files that match the rule’s criteria.
Filter/Exclusion: Exclude processes related to patch management tools (e.g., wusa.exe, ansible.exe) or traffic to known update servers (e.g., windowsupdate.microsoft.com).
**Scenario: Log Collection