Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
12/03/2024, 23:11
General
- Target be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe
- Size 2.0MB
- Sample240312-26f69afe68
- SHA256 be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2
Malware Config
Extracted
-
stealc
-
http://185.172.128.145
-
url_path
/3cd2b41cbde8fc9c.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 3 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.
- UPX packed file 4 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 27 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe"C:\Users\Admin\AppData\Local\Temp\be7cab4f62e17b7fc80b960644637bc0b014fe526c39d5103890345eaba3fed2.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\syncUpd.exeC:\Users\Admin\AppData\Local\Temp\syncUpd.exe2⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\GHJKJDAKEH.exe"3⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\GHJKJDAKEH.exe"C:\Users\Admin\AppData\Local\Temp\GHJKJDAKEH.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
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\GHJKJDAKEH.exe5⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30006⤵
- Runs ping.exe
-
-
-
-
-
-
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
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "3⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\chcp.comchcp 12514⤵
-
-
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)
-
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Are.docx
nss3.dll
BroomSetup.exe
GHJKJDAKEH.exe
INetC.dll
syncUpd.exe
Task.bat
memory/316-72-0x0000000000400000-0x0000000000930000-memory.dmp
memory/316-28-0x0000000000DF0000-0x0000000000DF1000-memory.dmp
memory/316-79-0x0000000000DF0000-0x0000000000DF1000-memory.dmp
memory/316-121-0x0000000000400000-0x0000000000930000-memory.dmp
memory/316-23-0x0000000000400000-0x0000000000930000-memory.dmp
memory/628-130-0x00000000058E0000-0x00000000058F0000-memory.dmp
memory/628-129-0x0000000072AD0000-0x0000000073280000-memory.dmp
memory/628-128-0x0000000000D80000-0x0000000000D9E000-memory.dmp
memory/628-134-0x0000000072AD0000-0x0000000073280000-memory.dmp
memory/628-135-0x00000000058E0000-0x00000000058F0000-memory.dmp
memory/3992-22-0x0000000000400000-0x000000000043D000-memory.dmp
memory/5116-78-0x0000000000650000-0x0000000000750000-memory.dmp
memory/5116-120-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-98-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-124-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-76-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-71-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-32-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/5116-27-0x0000000000400000-0x000000000063B000-memory.dmp
memory/5116-26-0x00000000008A0000-0x00000000008C7000-memory.dmp
memory/5116-25-0x0000000000650000-0x0000000000750000-memory.dmp