Gửi #15814: Trojan.Win32.Inject.adwas / Insecure Permissions

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/acfce60da9031e00c22818f2616d6424.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan.Win32.Inject.adwas
Vulnerability: Insecure Permissions
Description: The malware creates a dir with insecure permissions under c:\ drive and grants 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: acfce60da9031e00c22818f2616d6424
Vuln ID: MVID-2021-0275
Dropped files: 8SXa5mznye.vbs, tski.dll
Disclosure: 07/03/2021

Exploit/PoC:
C:\>cacls 8SXa5mznye8SXa5mznye
C:\8SXa5mznye8SXa5mznye BUILTIN\Administrators:(OI)(CI)(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F
BUILTIN\Users:(OI)(CI)(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

C:\>dir /a 8SXa5mznye8SXa5mznye
Volume in drive C has no label.

Directory of C:\8SXa5mznye8SXa5mznye

06/16/2021 02:48 AM 190 8SXa5mznye.vbs
03/06/2017 08:49 AM 605,696 tski.dll
03/06/2017 08:49 AM 1,488,230 x
3 File(s) 2,094,116 bytes

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• Nguồn: ⚠️ https://www.malvuln.com/advisory/acfce60da9031e00c22818f2616d6424.txt
• Người dùng: malvuln (UID 14984)
• Đệ trình: 06/07/2021 07:30 (cách đây 5 những năm)
• Kiểm duyệt: 06/07/2021 07:52 (22 minutes later)
• Trạng thái: được chấp nhận
• Mục VulDB: 177988 [Trojan.Win32.Inject.adwas nâng cao đặc quyền]
• điểm: 20