Analysis
- max time kernel
150s - max time network
138s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
12/03/2024, 23:11
General
- Target be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe
- Size 2.0MB
- Sample240312-26f69afe68
- SHA256 be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2
Malware Config
Extracted
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stealc
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http://185.172.128.145
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url_path
/3cd2b41cbde8fc9c.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 8 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.
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
- 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).
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 43 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe"C:\Users\Admin\AppData\Local\Temp\be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\syncUpd.exeC:\Users\Admin\AppData\Local\Temp\syncUpd.exe2⤵
- Executes dropped EXE
- 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\EHJDHJKFIE.exe"3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\EHJDHJKFIE.exe"C:\Users\Admin\AppData\Local\Temp\EHJDHJKFIE.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- 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\EHJDHJKFIE.exe5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30006⤵
- Runs ping.exe
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\GIJDGCAEBF.exe"3⤵
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C:\Users\Admin\AppData\Local\Temp\BroomSetup.exeC:\Users\Admin\AppData\Local\Temp\BroomSetup.exe2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\chcp.comchcp 12514⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F4⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
BroomSetup.exe
EHJDHJKFIE.exe
Task.bat
mozglue.dll
nss3.dll
BroomSetup.exe
INetC.dll
syncUpd.exe
memory/1652-184-0x0000000000800000-0x0000000000801000-memory.dmp
memory/2100-168-0x0000000000340000-0x000000000035E000-memory.dmp
memory/2100-182-0x0000000071EC0000-0x00000000725AE000-memory.dmp
memory/2100-187-0x0000000004D60000-0x0000000004DA0000-memory.dmp
memory/2264-29-0x0000000005070000-0x00000000055A0000-memory.dmp
memory/2264-27-0x0000000000400000-0x000000000043D000-memory.dmp
memory/2588-71-0x0000000000AA0000-0x0000000000BA0000-memory.dmp
memory/2588-117-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-33-0x0000000000AA0000-0x0000000000BA0000-memory.dmp
memory/2588-72-0x0000000000230000-0x0000000000257000-memory.dmp
memory/2588-87-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-97-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-102-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-66-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-44-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2588-34-0x0000000000230000-0x0000000000257000-memory.dmp
memory/2588-127-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-140-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-143-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-35-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2588-144-0x0000000000AA0000-0x0000000000BA0000-memory.dmp
memory/2936-70-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2936-67-0x0000000000400000-0x0000000000930000-memory.dmp
memory/2936-31-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2936-30-0x0000000000400000-0x0000000000930000-memory.dmp
memory/2936-192-0x0000000000400000-0x0000000000930000-memory.dmp