Thursday, February 17, 2022

Trojan-Spy.Win32.Zbot.aawo.Zeus-Builder Insecure Permissions

Discovery / credits: Malvuln - (c) 2022
Original source:
Contact: [email protected]

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

ZeuS Builder

Config and loader building

Loading config from file 'C:\Users\Victim\Desktop\config2.txt'...
Loading succeeded!
Building bot file...
timer_config=120000ms, 60000ms
timer_logs=120000ms, 60000ms
timer_stats=120000ms, 60000ms
Build succeeded!

C:\>cacls ldr_test.exe
C:\ldr_test.exe BUILTIN\Administrators:(ID)F
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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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore