Analysis
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max time kernel
133s -
max time network
103s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
25-05-2024 09:54
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20231129-en
General
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Target
file.exe
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Size
355KB
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MD5
8a848d90a8d7a8c79b80d2dd8d330d9d
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SHA1
6694c6e16123598f1665b7c68da40fd342e683fa
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SHA256
42f7ec36e07bca91cfa99c9b5a1643a7674e4af4c93905a993eab902e0bfa70d
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SHA512
d67683611a368964d4dbc2ed85c9c458e5502cc8fb50608ef184cdb574e55636f800c471f8224b1fe82874175f9802d07a8dacdac5eeb73bd72a35bb7b71d54e
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SSDEEP
6144:FHAqyjjclaS6sR38CS0iD7RjPyvB7m2Rx6PLfciHid4Fwem:JAqyjjmK06ByZ7m2yee
Malware Config
Extracted
stealc
Extracted
vidar
https://steamcommunity.com/profiles/76561199689717899
https://t.me/copterwin
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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/1792-2-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-7-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-6-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-11-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-12-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-29-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-30-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-46-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-47-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-64-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral2/memory/1792-65-0x0000000000400000-0x0000000000646000-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-1-5-21-540404634-651139247-2967210625-1000\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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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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 4604 set thread context of 1792 4604 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 4352 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
RegAsm.exepid process 1792 RegAsm.exe 1792 RegAsm.exe 1792 RegAsm.exe 1792 RegAsm.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
file.exeRegAsm.execmd.exedescription pid process target process PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 4604 wrote to memory of 1792 4604 file.exe RegAsm.exe PID 1792 wrote to memory of 1552 1792 RegAsm.exe cmd.exe PID 1792 wrote to memory of 1552 1792 RegAsm.exe cmd.exe PID 1792 wrote to memory of 1552 1792 RegAsm.exe cmd.exe PID 1552 wrote to memory of 4352 1552 cmd.exe timeout.exe PID 1552 wrote to memory of 4352 1552 cmd.exe timeout.exe PID 1552 wrote to memory of 4352 1552 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
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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
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\HCFCFHJDBKJK" & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/1792-11-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-14-0x000000001B540000-0x000000001B79F000-memory.dmpFilesize
2.4MB
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memory/1792-65-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-2-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-7-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-6-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-64-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-12-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-47-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-29-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-30-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/1792-46-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/4604-0-0x0000000000370000-0x0000000000371000-memory.dmpFilesize
4KB
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memory/4604-1-0x0000000000370000-0x0000000000371000-memory.dmpFilesize
4KB
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memory/4604-3-0x0000000000370000-0x0000000000371000-memory.dmpFilesize
4KB