Analysis
- max time kernel
271s - max time network
275s - platform
windows7_x64 - resource
win7-20240419-en - resource tags
- submitted
29/04/2024, 12:34
General
- Target fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe
- Size 347KB
- Sample240429-pr9h2aba7x
- SHA256 fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043
Malware Config
Extracted
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stealc
-
http://185.172.128.151
-
url_path
/7043a0c6a68d9c65.php
Signatures
- Detects Arechclient2 RAT 1 IoCs
Arechclient2.
- SectopRAT
SectopRAT is a remote access trojan first seen in November 2019.
- SectopRAT payload 1 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 12 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.
- Suspicious use of SetThreadContext 2 IoCs
- 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.
- Suspicious behavior: EnumeratesProcesses 9 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 22 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe"C:\Users\Admin\AppData\Local\Temp\fa38bc50e82c0b00890b3234017ee1c0446f48114e700717f69d12dfb5c7d043.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\u1kk.0.exe"C:\Users\Admin\AppData\Local\Temp\u1kk.0.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
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C:\Users\Admin\AppData\Local\Temp\u1kk.2\run.exe"C:\Users\Admin\AppData\Local\Temp\u1kk.2\run.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\SysWOW64\cmd.exe3⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
U1KK1~1.ZIP
dc6daed4
tmpAF24.tmp
UIxMarketPlugin.dll
bunch.dat
run.exe
whale.dbf
mozglue.dll
nss3.dll
u1kk.0.exe
relay.dll
memory/2036-127-0x0000000000400000-0x0000000002B15000-memory.dmp
memory/2036-128-0x0000000002BD0000-0x0000000002CD0000-memory.dmp
memory/2036-1-0x0000000002BD0000-0x0000000002CD0000-memory.dmp
memory/2036-2-0x00000000002F0000-0x000000000035D000-memory.dmp
memory/2036-3-0x0000000000400000-0x0000000002B15000-memory.dmp
memory/2332-229-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp
memory/2332-228-0x0000000072610000-0x0000000073672000-memory.dmp
memory/2332-230-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp
memory/2332-231-0x0000000000400000-0x00000000004C6000-memory.dmp
memory/2728-180-0x0000000076FE0000-0x0000000077189000-memory.dmp
memory/2728-226-0x0000000073CD0000-0x0000000073E44000-memory.dmp
memory/2884-143-0x0000000073CD0000-0x0000000073E44000-memory.dmp
memory/2884-177-0x0000000073CD0000-0x0000000073E44000-memory.dmp
memory/2884-144-0x0000000076FE0000-0x0000000077189000-memory.dmp
memory/2936-176-0x0000000000400000-0x0000000002AF0000-memory.dmp
memory/2936-91-0x0000000061E00000-0x0000000061EF3000-memory.dmp