The detection identifies potential 32-bit malware distribution through malicious URLs, which adversaries may use to deliver payloads to compromised systems. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage attacks that leverage outdated 32-bit infrastructure to evade modern defenses.
IOC Summary
Threat: 32-bit Total URLs: 46 Active URLs: 42
| URL | Status | Threat | Date Added |
|---|---|---|---|
hxxp://117.235.117.8:40693/i | online | malware_download | 2026-03-19 |
hxxp://117.223.140.8:39402/i | online | malware_download | 2026-03-19 |
hxxp://117.205.90.155:57197/bin.sh | online | malware_download | 2026-03-19 |
hxxp://117.235.117.8:40693/bin.sh | online | malware_download | 2026-03-19 |
hxxp://115.55.246.34:48695/bin.sh | online | malware_download | 2026-03-19 |
hxxp://82.144.86.37:46593/bin.sh | online | malware_download | 2026-03-19 |
hxxp://110.37.45.161:38771/i | online | malware_download | 2026-03-19 |
hxxp://117.223.140.8:39402/bin.sh | online | malware_download | 2026-03-19 |
hxxp://123.13.103.228:50407/i | online | malware_download | 2026-03-19 |
hxxp://175.165.80.253:37123/i | online | malware_download | 2026-03-19 |
hxxp://115.48.151.224:56650/i | online | malware_download | 2026-03-19 |
hxxp://175.165.80.253:37123/bin.sh | online | malware_download | 2026-03-19 |
hxxp://110.37.45.161:38771/bin.sh | online | malware_download | 2026-03-19 |
hxxp://59.183.118.33:50503/i | online | malware_download | 2026-03-19 |
hxxp://123.13.103.228:50407/bin.sh | online | malware_download | 2026-03-19 |
hxxp://182.117.160.77:41173/bin.sh | online | malware_download | 2026-03-19 |
hxxp://79.24.141.59:56310/i | online | malware_download | 2026-03-19 |
hxxp://27.37.100.58:59354/i | online | malware_download | 2026-03-19 |
hxxp://222.140.160.89:33524/i | online | malware_download | 2026-03-19 |
hxxp://115.48.151.224:56650/bin.sh | online | malware_download | 2026-03-19 |
hxxp://110.37.97.71:35298/i | online | malware_download | 2026-03-19 |
hxxp://79.24.141.59:56310/bin.sh | online | malware_download | 2026-03-19 |
hxxp://110.37.55.92:54086/i | online | malware_download | 2026-03-19 |
hxxp://27.37.100.58:59354/bin.sh | offline | malware_download | 2026-03-19 |
hxxp://59.183.118.33:50503/bin.sh | offline | malware_download | 2026-03-19 |
// Hunt for DNS resolution of URLhaus malicious domains
// Threat: 32-bit
let malicious_domains = dynamic(["39.74.235.15", "117.205.90.155", "115.48.151.224", "222.140.160.89", "110.37.45.161", "42.227.197.21", "182.117.160.77", "175.165.80.253", "110.37.97.71", "42.234.72.238", "117.223.140.8", "117.235.117.8", "79.24.141.59", "115.55.246.34", "82.144.86.37", "110.37.55.92", "27.37.100.58", "222.139.108.152", "222.140.179.126", "59.183.118.33", "123.13.103.228"]);
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(["39.74.235.15", "117.205.90.155", "115.48.151.224", "222.140.160.89", "110.37.45.161", "42.227.197.21", "182.117.160.77", "175.165.80.253", "110.37.97.71", "42.234.72.238", "117.223.140.8", "117.235.117.8", "79.24.141.59", "115.55.246.34", "82.144.86.37", "110.37.55.92", "27.37.100.58", "222.139.108.152", "222.140.179.126", "59.183.118.33", "123.13.103.228"]);
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 |
Scenario: Scheduled system update job downloads a 32-bit Windows update from Microsoft’s official CDN
Filter/Exclusion: Exclude URLs containing update.microsoft.com or windowsupdate.com
Scenario: IT admin manually downloads a 32-bit version of a legitimate tool like 7-Zip or WinRAR from the official website
Filter/Exclusion: Exclude URLs containing 7-zip.org, winrar.com, or official download links
Scenario: A user accesses a 32-bit version of a legitimate application (e.g., Notepad++) from a company-approved software repository
Filter/Exclusion: Exclude URLs containing notepad-plus-plus.org or company-internal-repo.com
Scenario: A system runs a 32-bit version of a virtualization tool like VirtualBox or VMware Workstation
Filter/Exclusion: Exclude URLs containing virtualbox.org, vmware.com, or 32-bit virtualization tools
Scenario: A backup job transfers a 32-bit executable from a local network share to a remote server
Filter/Exclusion: Exclude URLs with file:// protocol or internal IP ranges (e.g., 192.168.x.x)