IRC-Worm.Win32.Silentium.a Insecure Permissions

IRC-Worm.Win32.Silentium.a malware suffers from an insecure permissions vulnerability.

MD5 | ea86c34c522a2e91ed94255670b2b1a8

Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Threat: IRC-Worm.Win32.Silentium.a
Vulnerability: Insecure Permissions
Description: Silentium.a creates an insecure dir named "Games" 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: 7a3c4ec00ba952207f25d1189c86ce22
Vuln ID: MVID-2021-0153
Dropped files: svchost.exe
Disclosure: 03/30/2021

C:\>cacls Games
C:\Games BUILTIN\Administrators:(OI)(CI)(ID)F
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

C:\>cd Games

Volume in drive C has no label.

Directory of C:\Games

06/14/2012 06:08 PM 20,480 svchost.exe
1 File(s) 20,480 bytes

Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) (TM).

Related Posts