The ThreatFox: AsyncRAT IOCs rule detects potential command and control communication associated with the AsyncRAT malware, which is known for its persistence and data exfiltration capabilities. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate advanced persistent threats before they cause significant data loss or network compromise.
IOC Summary
Malware Family: AsyncRAT Total IOCs: 20 IOC Types: domain, ip:port
| Type | Value | Threat Type | First Seen | Confidence |
|---|---|---|---|---|
| domain | patriciakleijn.nl | botnet_cc | 2026-05-24 | 75% |
| domain | hvit.sa.com | botnet_cc | 2026-05-24 | 75% |
| domain | xstp.me | botnet_cc | 2026-05-24 | 75% |
| domain | fo88.ws | botnet_cc | 2026-05-24 | 75% |
| domain | tofstore.nl | botnet_cc | 2026-05-24 | 75% |
| domain | js-shop.my | botnet_cc | 2026-05-24 | 75% |
| domain | e-maxibikes.nl | botnet_cc | 2026-05-24 | 75% |
| domain | appmine.io | botnet_cc | 2026-05-24 | 75% |
| domain | eriktez.sa.com | botnet_cc | 2026-05-24 | 75% |
| domain | hypebeast.co.com | botnet_cc | 2026-05-24 | 75% |
| domain | dbpw.cn.com | botnet_cc | 2026-05-24 | 75% |
| domain | wljj.sa.com | botnet_cc | 2026-05-24 | 75% |
| domain | keukengemaal.nl | botnet_cc | 2026-05-24 | 75% |
| domain | 123b-mobilee.com | botnet_cc | 2026-05-24 | 75% |
| domain | onlinebettingsite.us.com | botnet_cc | 2026-05-23 | 75% |
| domain | dmong.io | botnet_cc | 2026-05-23 | 75% |
| ip:port | 18[.]118[.]196[.]244:6666 | botnet_cc | 2026-05-23 | 75% |
| ip:port | 168[.]222[.]97[.]106:6606 | botnet_cc | 2026-05-23 | 75% |
| ip:port | 157[.]254[.]223[.]135:6606 | botnet_cc | 2026-05-23 | 75% |
| domain | 123b-mb.com | botnet_cc | 2026-05-23 | 75% |
// Hunt for network connections to known malicious IPs
// Source: ThreatFox - AsyncRAT
let malicious_ips = dynamic(["18.118.196.244", "157.254.223.135", "168.222.97.106"]);
CommonSecurityLog
| where DestinationIP in (malicious_ips) or SourceIP in (malicious_ips)
| project TimeGenerated, SourceIP, DestinationIP, DestinationPort, DeviceAction, Activity
| order by TimeGenerated desc// Hunt in Defender for Endpoint network events
let malicious_ips = dynamic(["18.118.196.244", "157.254.223.135", "168.222.97.106"]);
DeviceNetworkEvents
| where RemoteIP in (malicious_ips)
| project Timestamp, DeviceName, RemoteIP, RemotePort, InitiatingProcessFileName, ActionType
| order by Timestamp desc// Hunt for DNS queries to known malicious domains
// Source: ThreatFox - AsyncRAT
let malicious_domains = dynamic(["patriciakleijn.nl", "hvit.sa.com", "xstp.me", "fo88.ws", "tofstore.nl", "js-shop.my", "e-maxibikes.nl", "appmine.io", "eriktez.sa.com", "hypebeast.co.com", "dbpw.cn.com", "wljj.sa.com", "keukengemaal.nl", "123b-mobilee.com", "onlinebettingsite.us.com", "dmong.io", "123b-mb.com"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses, QueryType
| order by TimeGenerated desc| Sentinel Table | Notes |
|---|---|
CommonSecurityLog | Ensure this data connector is enabled |
DeviceNetworkEvents | Ensure this data connector is enabled |
DnsEvents | Ensure this data connector is enabled |
Scenario: Legitimate scheduled job using crontab for system maintenance
Description: A system administrator schedules a legitimate maintenance task using crontab that coincidentally matches one of the AsyncRAT IOCs (e.g., a script name or path).
Filter/Exclusion: Check for crontab entries or use a filter like process.parent_process_name == "crontab" or process.command_line contains "crontab".
Scenario: Use of wget or curl for legitimate software updates
Description: A system administrator uses wget or curl to download a legitimate software update from a known internal or external repository, which may match an AsyncRAT IOC.
Filter/Exclusion: Filter by process.name != "wget" or process.name != "curl", or check for process.command_line contains "update" or "software".
Scenario: Execution of a legitimate PowerShell script with Invoke-WebRequest
Description: A PowerShell script, such as a configuration management tool or a patching script, uses Invoke-WebRequest to download a file that matches an AsyncRAT IOC.
Filter/Exclusion: Filter by process.name != "powershell.exe" or check for process.command_line contains "Invoke-WebRequest" or "patch".
Scenario: Use of tar or gzip for decompressing legitimate archives
Description: A system administrator uses tar or gzip to decompress a legitimate archive (e.g., a software package or backup) that contains a file matching an AsyncRAT IOC.
Filter/Exclusion: Filter by process.name != "tar" or process.name != "gzip", or check for process.command_line contains "extract" or "decompress"