Backdoor.Win32.Jeemp.c / Cleartext Hardcoded Credentials

us malvuln (US) us
Risk: Medium
Local: Yes
Remote: No

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024 Original source: Contact: Media: Threat: Backdoor.Win32.Jeemp.c Vulnerability: Cleartext Hardcoded Credentials Description: 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: Jeemp Type: PE32 MD5: d6b192a4027c7d635499133ca6ce067f Vuln ID: MVID-2024-0672 Dropped files: msrexe.exe Disclosure: 02/28/2024 Exploit/PoC: TELNET x.x.x.x 7562 220 jeem.mail.pv ESMTP HELO hate 250 ok GDATA 250 ok Need password jeepower [prx]####### 250 ok SDATA 250 ok Need password abc123! 503 wrong! SDATA 250 ok Need password jeespower 250 ok 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) (TM).

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