Full Disclosure mailing list archives

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024
Original source:
https://malvuln.com/advisory/d6b192a4027c7d635499133ca6ce067f.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

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) Malvuln.com (TM).
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/

Current thread:

• Backdoor.Win32.Jeemp.c / Cleartext Hardcoded Credentials malvuln (Mar 02)