Analysis
- max time kernel
151s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
15/03/2024, 04:24
General
- Target 9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d.exe
- Size 368KB
- Sample240315-e1meragb6s
- SHA256 9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d
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
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 4 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.
- UPX packed file 3 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).
- Program crash 1 IoCs
- 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 30 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d.exe"C:\Users\Admin\AppData\Local\Temp\9e7b0a827b302d9f15eb1e1303fae16788fdd9ca72236b6d1d297dbfc14cb73d.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallSetup_two.exeC:\Users\Admin\AppData\Local\Temp\InstallSetup_two.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\u6g.0.exe"C:\Users\Admin\AppData\Local\Temp\u6g.0.exe"3⤵
- Checks computer location settings
- 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\HIDAFHDHCB.exe"4⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\HIDAFHDHCB.exe"C:\Users\Admin\AppData\Local\Temp\HIDAFHDHCB.exe"5⤵
- Checks computer location settings
- 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\HIDAFHDHCB.exe6⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30007⤵
- Runs ping.exe
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C:\Users\Admin\AppData\Local\Temp\u6g.1.exe"C:\Users\Admin\AppData\Local\Temp\u6g.1.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\chcp.comchcp 12515⤵
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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 /F5⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 232 -s 15883⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 232 -ip 2321⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Are.docx
mozglue.dll
nss3.dll
HIDAFHDHCB.exe
InstallSetup_two.exe
u6g.0.exe
u6g.1.exe
Task.bat
memory/232-9-0x0000000000400000-0x000000000046E000-memory.dmp
memory/232-33-0x0000000000400000-0x000000000046E000-memory.dmp
memory/232-8-0x0000000000730000-0x0000000000797000-memory.dmp
memory/232-7-0x00000000007F0000-0x00000000008F0000-memory.dmp
memory/704-32-0x0000000000F90000-0x0000000000F91000-memory.dmp
memory/704-137-0x0000000000F90000-0x0000000000F91000-memory.dmp
memory/704-31-0x0000000000400000-0x0000000000930000-memory.dmp
memory/704-90-0x0000000000400000-0x0000000000930000-memory.dmp
memory/1296-5-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1480-41-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/1480-89-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1480-40-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1480-127-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1480-130-0x0000000000400000-0x000000000063B000-memory.dmp
memory/1480-39-0x00000000007D0000-0x00000000007F7000-memory.dmp
memory/1480-38-0x0000000000810000-0x0000000000910000-memory.dmp
memory/3820-135-0x0000000000270000-0x000000000028E000-memory.dmp
memory/3820-136-0x0000000072D30000-0x00000000734E0000-memory.dmp
memory/3820-138-0x0000000004E10000-0x0000000004E20000-memory.dmp
memory/3820-142-0x0000000072D30000-0x00000000734E0000-memory.dmp
memory/3820-143-0x0000000004E10000-0x0000000004E20000-memory.dmp