Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
03-06-2024 09:16
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20240220-en
General
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Target
file.exe
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Size
407KB
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MD5
8f36720e87f9d5f3515afbe099b0e457
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SHA1
e404cf4fb5ad9d9bff8bd5c8d343a60df27161d8
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SHA256
7d740bcc6e1ebdf1ec1a25242db7ab2aabbfa568394f0775287e28f69d526877
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SHA512
05e46480bf2a4e788b21a5209e9400eb73656b8bb6d716af981f36fd05a7c6142c4cfdefa9dee01098c7b2621e6ccf63c331a2ad27fcf9bcea1f45faeb133a25
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SSDEEP
6144:+EotgE1A4rFmd7Ta1SkmkwMZCKmLuKtuMfDFrbWWxhg8ZkriwCEvMzZwb0LlmwrW:+fNUd7Ta1DTn+ttfdpbZwGCb0QMqES
Malware Config
Extracted
stealc
Extracted
vidar
https://t.me/ta904ek
https://steamcommunity.com/profiles/76561199695752269
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
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Detect Vidar Stealer 11 IoCs
Processes:
resource yara_rule behavioral2/memory/1636-2-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-5-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-7-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-10-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-11-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-28-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-29-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-45-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-46-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-57-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 behavioral2/memory/1636-58-0x0000000000400000-0x0000000000649000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
RegAsm.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation RegAsm.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
file.exedescription pid process target process PID 2920 set thread context of 1636 2920 file.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
RegAsm.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegAsm.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1500 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
RegAsm.exepid process 1636 RegAsm.exe 1636 RegAsm.exe 1636 RegAsm.exe 1636 RegAsm.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
file.exeRegAsm.execmd.exedescription pid process target process PID 2920 wrote to memory of 2436 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 2436 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 2436 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1200 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1200 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1200 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 2920 wrote to memory of 1636 2920 file.exe RegAsm.exe PID 1636 wrote to memory of 848 1636 RegAsm.exe cmd.exe PID 1636 wrote to memory of 848 1636 RegAsm.exe cmd.exe PID 1636 wrote to memory of 848 1636 RegAsm.exe cmd.exe PID 848 wrote to memory of 1500 848 cmd.exe timeout.exe PID 848 wrote to memory of 1500 848 cmd.exe timeout.exe PID 848 wrote to memory of 1500 848 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2920 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵PID:2436
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵PID:1200
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1636 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\FIIJJKKFHIEH" & exit3⤵
- Suspicious use of WriteProcessMemory
PID:848 -
C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
PID:1500
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