One Article Review
| Source |  Fortinet ThreatSignal |
|---|---|
| Identifiant | 3846192 |
| Date de publication | 2021-12-15 16:45:13 (vue: 2021-12-22 04:05:15) |
| Titre | Newly Patched Windows Vulnerability (CVE-2021-43890) Being Exploited to Deliver Malware |
| Texte | FortiGuard Labs is aware of a report that a newly patched Windows vulnerability (CVE-2021-43890) is being exploited in the wild to deliver malware such as Emotet, Trickybot and Bazaloader. Exploiting CVE-2021-43890 allows an attacker to create a malicious package file that looks like a legitimate application. The vulnerability is patched as part of MS Tuesday in December 2021. Why is this Significant?This is significant because CVE-2021-43890 was abused as a zero-day to deliver Emotet, Trickybot and Bazaloader. Those malware typically deploy additional malware including ransomware to a compromised machine.What is CVE-2021-43890?CVE-2021-43890 is Windows AppX Installer Spoofing Vulnerability that allows an attack to spoof a malicious package as legitimate software. For example, an attacker can abuse CVE-2021-43890 to create a fake malicious package that has an icon of legitimate software, a valid certificate that marks the package as a Trusted App along with fraudulent publisher information. These pieces increase the chance of convincing the victim to run the file. Image of "Windows AppX Installer abuse to install Emotet" courtesy of BleepingComputerMicrosoft rates this vulnerability as important.Has the Vendor Released a Fix for the Vulnerability?Yes, Microsoft released a fix on December 14th, 2021, as part of December Patch Tuesday.What is the Status of Coverage?There is not sufficient information available yet that enables FortiGuard Labs to develop IPS protection for CVE-2021-43890.FortiGuard Labs provides the following AV coverage against malware that abuses CVE-2021-43890:W32/GenCBL.BHP!trW32/Kryptik.HNMX!tr |
| Envoyé | Oui |
| Condensat | 14th 2021 43890 43890:w32/gencbl abuse abused abuses additional against allows along app application appx attack attacker available aware bazaloader because being bhp bleepingcomputermicrosoft can certificate chance compromised convincing courtesy coverage create cve day december deliver deploy develop emotet enables example exploited exploiting fake file fix following fortiguard fraudulent has hnmx icon image important including increase information install installer ips labs legitimate like looks machine malicious malware marks microsoft newly not package part patch patched pieces protection provides publisher ransomware rates released report run significant software spoof spoofing status such sufficient these those trickybot trusted trw32/kryptik tuesday typically valid vendor victim vulnerability what why wild windows yet zero |
| Tags | Ransomware Malware Vulnerability |
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