Backdoor.Win32.Jeemp.c MVID-2024-0672 Hardcoded Credential

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024Original source: https://malvuln.com/advisory/d6b192a4027c7d635499133ca6ce067f.txtContact: [email protected]: twitter.com/malvulnThreat: Backdoor.Win32.Jeemp.cVulnerability: Cleartext Hardcoded CredentialsDescription: The malware listens on three TCP ports which are randomized e.g. 9719,7562,8687,8948,7376,8396 so forth. There is an ESMTP server component "jeem.mail.pv" requiring authentication for the GDATA, SDATA commands and sample is packed using UPX. However, it is trivial to unpack using the -d flag which reveals the cleartext hardcoded credentials "jeepower" and "jeespower" in the PE file.Family: JeempType: PE32MD5: d6b192a4027c7d635499133ca6ce067fVuln ID: MVID-2024-0672Dropped files: msrexe.exeDisclosure: 02/28/2024Exploit/PoC:TELNET x.x.x.x 7562220 jeem.mail.pv ESMTPHELO hate250 okGDATA250 okNeed passwordjeepower[prx]#######250 okSDATA250 okNeed passwordabc123!503 wrong!SDATA250 okNeed passwordjeespower250 okDisclaimer: 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).