Trojan.Win32.Hosts2.yqf Insecure Permissions ≈ Packet Storm – Digitalmunition




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Published on April 9th, 2021 📆 | 3899 Views ⚑

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Trojan.Win32.Hosts2.yqf Insecure Permissions ≈ Packet Storm

Discovery / credits: Malvuln – malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/274a6e846c5a4a2b3281198556e5568b.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan.Win32.Hosts2.yqf
Vulnerability: Insecure Permissions
Description: Hosts2.yqf creates an insecure dir named “mlekaocYUmaae” under c: drive and grants change (C) permissions to the authenticated user group. Standard users can rename the executables dropped by the malware to disable it or replace it with their own executable. Then wait for a privileged user to logon to the infected machine to potentially escalate privileges.
Type: PE32
MD5: 274a6e846c5a4a2b3281198556e5568b
Vuln ID: MVID-2021-0162
Dropped files: HielDjixmHUfdeewc.exe
Disclosure: 04/07/2021

Exploit/PoC:
C:>cacls mlekaocYUmaae
C:mlekaocYUmaae BUILTINAdministrators:(OI)(CI)(ID)F
NT AUTHORITYSYSTEM:(OI)(CI)(ID)F
BUILTINUsers:(OI)(CI)(ID)R
NT AUTHORITYAuthenticated Users:(ID)C
NT AUTHORITYAuthenticated Users:(OI)(CI)(IO)(ID)C

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