This detection identifies adversary activity involving access to known 32-bit malicious URLs, which often indicates initial reconnaissance or command-and-control communication from legacy systems. Proactively hunting for these indicators in Azure Sentinel is critical because 32-bit processes are frequently targeted by attackers exploiting older architectures that may lack modern security controls.
Threat: 32-bit Total URLs: 57 Active URLs: 37
| URL | Status | Threat | Date Added |
|---|---|---|---|
hxxp://182.124.119.64:56849/i | online | malware_download | 2026-08-15 |
hxxp://221.14.40.110:37931/i | online | malware_download | 2026-08-15 |
hxxp://196.189.68.239:58818/i | online | malware_download | 2026-08-15 |
hxxp://110.37.61.166:60696/i | online | malware_download | 2026-08-15 |
hxxp://123.10.155.173:55027/i | online | malware_download | 2026-08-15 |
hxxp://182.124.119.64:56849/bin.sh | online | malware_download | 2026-08-15 |
hxxp://110.37.61.166:60696/bin.sh | online | malware_download | 2026-08-15 |
hxxp://156.146.24.110:48908/i | online | malware_download | 2026-08-15 |
hxxp://196.189.68.239:58818/bin.sh | online | malware_download | 2026-08-15 |
hxxp://123.10.155.173:55027/bin.sh | online | malware_download | 2026-08-15 |
hxxp://182.116.118.104:55662/bin.sh | online | malware_download | 2026-08-15 |
hxxp://156.146.24.110:48908/bin.sh | online | malware_download | 2026-08-15 |
hxxp://175.174.66.196:56771/i | online | malware_download | 2026-08-15 |
hxxp://46.159.139.237:45921/bin.sh | online | malware_download | 2026-08-15 |
hxxp://182.121.82.149:47697/i | online | malware_download | 2026-08-15 |
hxxp://115.51.38.188:51859/bin.sh | online | malware_download | 2026-08-15 |
hxxp://182.121.82.149:47697/bin.sh | offline | malware_download | 2026-08-15 |
hxxp://1.58.182.84:51623/i | offline | malware_download | 2026-08-15 |
hxxp://125.110.49.243:54807/i | offline | malware_download | 2026-08-15 |
hxxp://115.50.101.188:34800/i | offline | malware_download | 2026-08-15 |
hxxp://125.110.49.243:54807/bin.sh | online | malware_download | 2026-08-15 |
hxxp://115.50.101.188:34800/bin.sh | online | malware_download | 2026-08-15 |
hxxp://125.45.64.24:42706/i | offline | malware_download | 2026-08-15 |
hxxp://125.45.64.24:42706/bin.sh | online | malware_download | 2026-08-15 |
hxxp://200.115.102.2:47663/bin.sh | online | malware_download | 2026-08-15 |
// Hunt for DNS resolution of URLhaus malicious domains
// Threat: 32-bit
let malicious_domains = dynamic(["182.116.118.104", "110.36.1.200", "59.96.138.90", "46.159.139.237", "182.124.119.64", "182.117.131.145", "222.142.222.21", "182.121.82.149", "110.37.61.166", "200.115.102.2", "110.36.72.182", "219.157.243.71", "115.51.38.188", "115.50.101.188", "175.174.66.196", "156.146.24.110", "125.45.64.24", "123.10.155.173", "221.14.40.110", "125.110.49.243", "42.239.179.192", "115.55.10.187", "196.189.68.239", "42.231.186.227"]);
DnsEvents
| where Name has_any (malicious_domains)
| project TimeGenerated, Computer, Name, IPAddresses
| order by TimeGenerated desc
// Hunt for web traffic to URLhaus malicious domains
let malicious_domains = dynamic(["182.116.118.104", "110.36.1.200", "59.96.138.90", "46.159.139.237", "182.124.119.64", "182.117.131.145", "222.142.222.21", "182.121.82.149", "110.37.61.166", "200.115.102.2", "110.36.72.182", "219.157.243.71", "115.51.38.188", "115.50.101.188", "175.174.66.196", "156.146.24.110", "125.45.64.24", "123.10.155.173", "221.14.40.110", "125.110.49.243", "42.239.179.192", "115.55.10.187", "196.189.68.239", "42.231.186.227"]);
CommonSecurityLog
| where RequestURL has_any (malicious_domains) or DestinationHostName has_any (malicious_domains)
| project TimeGenerated, SourceIP, RequestURL, DestinationHostName, DeviceAction
| order by TimeGenerated desc
| Sentinel Table | Notes |
|---|---|
CommonSecurityLog | Ensure this data connector is enabled |
DnsEvents | Ensure this data connector is enabled |
Here are 4 specific false positive scenarios for the URLhaus: 32-bit Malicious URLs detection rule, including targeted filters and exclusions suitable for an enterprise environment:
Legacy Application Updates via Windows Update Service
wuauserv) or a legacy internal application (e.g., older versions of Adobe Acrobat Reader or Java Runtime) frequently downloads 32-bit installer packages from Microsoft’s CDN. These URLs often contain dynamic query parameters that URLhaus may flag as “suspicious” due to the high volume of unique hash combinations, even though they are legitimate distribution points for trusted software.*.update.microsoft.com and download.microsoft.com originating from the specific process wuauclt.exe. Additionally, exclude URLs containing the query parameter ?arch=amd64 or ?platform=win32 if they are known to be part of standard patching cycles.Automated Backup Agent Communication
VeeamService.exe (or vssvc.exe) accessing URLs ending in /api/status or /license/renew. Implement a filter that suppresses alerts if the HTTP response code is 200 OK and the connection duration is under 5 seconds, indicating a successful heartbeat rather