Backdoor.Win32.DarkKomet.bhfh / Insecure Permissions

2021.02.19
us malvuln (US) us
Risk: Medium
Local: Yes
Remote: No
CVE: N/A
CWE: N/A

Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/2e507b75c0df0fcb2f9a85f4a0c1bc04.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.DarkKomet.bhfh Vulnerability: Insecure Permissions Description: DarkKomet.bhfh creates a hidden insecure directory under c:\ drive granting change (C) permissions to the authenticated user group. The backdoor also drops an EXE named "ÚÈÏÇáÑÍãä.exe in that dir. Type: PE32 MD5: 2e507b75c0df0fcb2f9a85f4a0c1bc04 Vuln ID: MVID-2021-0097 Dropped files: ÚÈÏÇáÑÍãä.exe Disclosure: 02/18/2021 Exploit/PoC: C:\>dir /a \System Volume in drive C has no label. Directory of C:\System .. 06/14/2012 05:38 PM 730,112 ÚÈÏÇáÑÍãä.exe 1 File(s) 730,112 bytes 2 Dir(s) 48,290,029,568 bytes free C:\>cacls \System C:\System 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 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).


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