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Date: Thu, 23 Jun 2022 22:28:30 -0400
From: malvuln <>
Subject: [FD] Yashma Ransomware Builder v1.2 / Insecure Permissions

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source:

Threat: Yashma Ransomware Builder v1.2
Vulnerability: Insecure Permissions
Description: The malware creates PE files with insecure permissions when
writing to c:\ drive, granting change (C) permissions to the authenticated
user group. Standard users can rename the executable 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
Family: Yashma
Type: PE32
MD5: 13e878ed7e547523cffc5728f6ba4190
Vuln ID: MVID-2022-0613
Disclosure: 06/23/2022

C:\>cacls hate.exe
C:\hate.exe BUILTIN\Administrators:(ID)F
            NT AUTHORITY\Authenticated Users:(ID)C

C:\>dir hate.exe
 Volume in drive C has no label.

 Directory of C:\

05/14/2022  01:20 AM            54,784 hate.exe
               1 File(s)         54,784 bytes

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