{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2025-33053/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.8,"id":"CVE-2025-33053"}],"_cs_exploited":true,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Internet Explorer"],"_cs_severities":["high"],"_cs_tags":["cve-2025-33053","initial-access","defense-evasion","execution","windows"],"_cs_type":"threat","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2025-33053 is a vulnerability in Internet Explorer that allows for remote code execution when a user opens a specially crafted URL file. Successful exploitation can allow an attacker to execute arbitrary commands on the victim's system with the privileges of the current user. This is achieved by tricking the user into opening a malicious URL file, potentially delivered via phishing (T1566). The vulnerability can be exploited through the Diagnostics Utility for Internet Explorer (iediagcmd.exe), which spawns child processes to execute commands. Attackers may attempt to masquerade legitimate system processes (T1036) by using system binaries from non-standard locations to evade detection. The vulnerability was disclosed in 2025, and defenders should monitor for exploitation attempts using the techniques outlined below.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker crafts a malicious URL file designed to exploit CVE-2025-33053.\u003c/li\u003e\n\u003cli\u003eThe malicious URL file is delivered to the victim via phishing (T1566) or other means.\u003c/li\u003e\n\u003cli\u003eVictim opens the malicious URL file, which triggers the Internet Explorer Diagnostics Utility (iediagcmd.exe) to launch.\u003c/li\u003e\n\u003cli\u003eThe exploited iediagcmd.exe process attempts to execute system binaries such as route.exe, netsh.exe, ipconfig.exe, dxdiag.exe, conhost.exe, or makecab.exe from non-standard locations.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages these binaries to perform reconnaissance on the system, such as gathering network configuration (ipconfig.exe), or attempt to establish persistence.\u003c/li\u003e\n\u003cli\u003eThe attacker may use masquerading techniques (T1036.005) to hide their activity by naming the malicious binaries similarly to legitimate resources.\u003c/li\u003e\n\u003cli\u003eThe attacker can use system binary proxy execution (T1218) to perform malicious actions using trusted system tools.\u003c/li\u003e\n\u003cli\u003eThe ultimate objective could be lateral movement, data exfiltration, or deployment of ransomware.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2025-33053 can lead to arbitrary code execution on the victim's system. This could allow attackers to gain initial access to the network, escalate privileges, steal sensitive data, or deploy ransomware. The impact is significant due to the widespread use of Internet Explorer in enterprise environments, even if only for legacy application compatibility. The number of victims will vary based on the attacker's targeting and the success of their phishing campaigns.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Potential CVE-2025-33053 Exploitation\u0026quot; to your SIEM to detect suspicious child processes of iediagcmd.exe (rule.name).\u003c/li\u003e\n\u003cli\u003eReview and update endpoint security policies to restrict the execution of potentially malicious URL files (references).\u003c/li\u003e\n\u003cli\u003eEnable Sysmon process creation logging to capture detailed process execution information, which is required for the Sigma rules to function effectively (rules.logsource).\u003c/li\u003e\n\u003cli\u003eMonitor network connections originating from suspicious processes spawned by iediagcmd.exe for any unauthorized data exfiltration or communication with known malicious IP addresses (rules.logsource).\u003c/li\u003e\n\u003cli\u003eImplement additional monitoring and alerting for similar suspicious activities involving explorer.exe to enhance detection capabilities and prevent recurrence (rules.logsource).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-02T12:00:00Z","date_published":"2024-01-02T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-cve-2025-33053-exploitation/","summary":"Exploitation of CVE-2025-33053 via a malicious URL file can lead to the spawning of suspicious child processes from the Internet Explorer Diagnostics Utility (iediagcmd.exe), enabling initial access, defense evasion, and execution of arbitrary commands.","title":"Potential CVE-2025-33053 Exploitation via Internet Explorer Diagnostics","url":"https://feed.craftedsignal.io/briefs/2024-01-cve-2025-33053-exploitation/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2025-33053","version":"https://jsonfeed.org/version/1.1"}