Analysis
- max time kernel
91s - max time network
121s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
27/03/2024, 08:41
General
- Target c0ef05f7ddcbd4e305d13691ab2b2914.exe
- Size 255KB
- Sample240327-klez1sbf5z
- SHA256 d1bdeb7bcad474dc621ccaf3e266c0fb31edea844d574f802f27090ac04574c6
Malware Config
Extracted
-
stealc
-
http://185.172.128.26
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url_path
/f993692117a3fda2.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\c0ef05f7ddcbd4e305d13691ab2b2914.exe"C:\Users\Admin\AppData\Local\Temp\c0ef05f7ddcbd4e305d13691ab2b2914.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\IEHIIIJDAA.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\IEHIIIJDAA.exe"C:\Users\Admin\AppData\Local\Temp\IEHIIIJDAA.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\IEHIIIJDAA.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30005⤵
- Runs ping.exe
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4088 -s 20322⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4088 -ip 40881⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
IEHIIIJDAA.exe
memory/3524-109-0x0000000072940000-0x00000000730F0000-memory.dmp
memory/3524-105-0x0000000005A90000-0x0000000005AA0000-memory.dmp
memory/3524-104-0x0000000072940000-0x00000000730F0000-memory.dmp
memory/3524-103-0x0000000000FB0000-0x0000000000FD0000-memory.dmp
memory/4088-59-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-3-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-80-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-85-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-2-0x0000000000900000-0x0000000000927000-memory.dmp
memory/4088-1-0x0000000000930000-0x0000000000A30000-memory.dmp
memory/4088-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4088-54-0x0000000000930000-0x0000000000A30000-memory.dmp
memory/4088-53-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-108-0x0000000000400000-0x000000000063B000-memory.dmp
memory/4088-43-0x0000000000400000-0x000000000063B000-memory.dmp