Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240419-en - resource tags
- submitted
29/04/2024, 16:00
General
- Target 149bb20dbeaa6747d1db7148bd71cedfbf855f3c4244672ac986ca7ba1fddc0c.exe
- Size 347KB
- Sample240429-tfydvaee69
- SHA256 149bb20dbeaa6747d1db7148bd71cedfbf855f3c4244672ac986ca7ba1fddc0c
Malware Config
Extracted
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stealc
-
http://185.172.128.151
-
url_path
/7043a0c6a68d9c65.php
Signatures
- 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
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 3 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).
- Program crash 2 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 10 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\149bb20dbeaa6747d1db7148bd71cedfbf855f3c4244672ac986ca7ba1fddc0c.exe"C:\Users\Admin\AppData\Local\Temp\149bb20dbeaa6747d1db7148bd71cedfbf855f3c4244672ac986ca7ba1fddc0c.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\u3wo.0.exe"C:\Users\Admin\AppData\Local\Temp\u3wo.0.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 23683⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\u3wo.2\run.exe"C:\Users\Admin\AppData\Local\Temp\u3wo.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⤵
- 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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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5064 -s 15482⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 5064 -ip 50641⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4948 -ip 49481⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
cdade9d0
tmpF945.tmp
tmpF968.tmp
u3wo.0.exe
u3wo.1.zip
UIxMarketPlugin.dll
bunch.dat
relay.dll
run.exe
whale.dbf
memory/1224-150-0x00007FFEC69F0000-0x00007FFEC6BE5000-memory.dmp
memory/1224-193-0x0000000072DD0000-0x0000000072F4B000-memory.dmp
memory/1776-204-0x0000000005A10000-0x0000000005A1A000-memory.dmp
memory/1776-199-0x0000000005970000-0x0000000005A02000-memory.dmp
memory/1776-226-0x0000000008030000-0x000000000803A000-memory.dmp
memory/1776-207-0x0000000006800000-0x0000000006866000-memory.dmp
memory/1776-206-0x0000000006720000-0x000000000673E000-memory.dmp
memory/1776-205-0x0000000006C50000-0x000000000717C000-memory.dmp
memory/1776-198-0x0000000001300000-0x00000000013C6000-memory.dmp
memory/1776-195-0x00000000717E0000-0x0000000072A34000-memory.dmp
memory/1776-202-0x0000000005AC0000-0x0000000005B36000-memory.dmp
memory/1776-201-0x0000000005DC0000-0x0000000005F82000-memory.dmp
memory/1776-200-0x0000000006070000-0x0000000006614000-memory.dmp
memory/1776-203-0x0000000005B40000-0x0000000005B90000-memory.dmp
memory/3680-107-0x0000000072DD0000-0x0000000072F4B000-memory.dmp
memory/3680-99-0x0000000072DD0000-0x0000000072F4B000-memory.dmp
memory/3680-100-0x00007FFEC69F0000-0x00007FFEC6BE5000-memory.dmp
memory/4948-186-0x0000000000400000-0x0000000002AF0000-memory.dmp
memory/4948-110-0x0000000002D60000-0x0000000002E60000-memory.dmp
memory/4948-192-0x0000000000400000-0x0000000002AF0000-memory.dmp
memory/4948-111-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/5064-106-0x0000000000400000-0x0000000002B15000-memory.dmp
memory/5064-13-0x0000000000400000-0x0000000002B15000-memory.dmp
memory/5064-2-0x0000000004740000-0x00000000047AD000-memory.dmp
memory/5064-3-0x0000000000400000-0x0000000002B15000-memory.dmp
memory/5064-1-0x0000000002B60000-0x0000000002C60000-memory.dmp