Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/fe0dacbc953d4301232b386fcb3afc23.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Spy.Win32.Zbot.aawo.Zeus-Builder
Vulnerability: Insecure Permissions
Description: ZeuS Builder saves PE files to the c drive with insecure permissions 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 privileges.
Type: PE32
MD5: fe0dacbc953d4301232b386fcb3afc23
Vuln ID: MVID-2022-0493
Disclosure: 02/16/2022

Exploit/PoC:
ZeuS Builder

Config and loader building

Loading config from file 'C:\Users\Victim\Desktop\config2.txt'...
Loading succeeded!
Building bot file...
botnet=test
timer_config=120000ms, 60000ms
timer_logs=120000ms, 60000ms
timer_stats=120000ms, 60000ms
url_config=http://192.168.1.100/web/cfg_test.bin
url_compip=http://myip.ru
encryption_key=OK
Build succeeded!

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


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

 Directory of C:\

02/14/2022  03:19 AM            61,440 ldr_test.exe
               1 File(s)         61,440 bytes
               0 Dir(s)  26,621,710,336 bytes free


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