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Analysis
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max time kernel
136s -
max time network
125s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
21/08/2024, 01:40
Static task
static1
Behavioral task
behavioral1
Sample
bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe
Resource
win10v2004-20240802-en
General
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Target
bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe
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Size
200KB
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MD5
a10c9e9156eeb23374481f0edfa28ea8
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SHA1
9a19741b0778e0329358e8900eea28bfacadc233
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SHA256
bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5
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SHA512
233e7b02a8e2f8ffa6612a696d52bef47585c1be2045f98ddd046d030f40d68730a750dcfbf3b46c6ade1472876941cea6cc378a9fcf81a257769c228afa570e
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SSDEEP
3072:NPRoEqk7T3xZYd1G+zEoJjNnAFD9wuuZmN5kVOLBNzWHt5oPDJk2SGF+/iMlrKYp:bxXQ1xJZnAFD/imThNiN5oPDlF+K2EO
Malware Config
Extracted
vidar
https://steamcommunity.com/profiles/76561199751190313
https://t.me/pech0nk
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user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Signatures
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Detect Vidar Stealer 13 IoCs
resource yara_rule behavioral2/memory/4668-3-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-6-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-7-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-16-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-17-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-33-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-34-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-50-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-51-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-76-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-77-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-84-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 behavioral2/memory/4668-85-0x0000000000400000-0x0000000000643000-memory.dmp family_vidar_v7 -
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
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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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation RegAsm.exe -
Loads dropped DLL 2 IoCs
pid Process 4668 RegAsm.exe 4668 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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Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
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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
description pid Process procid_target PID 1956 set thread context of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language RegAsm.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language timeout.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 RegAsm.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegAsm.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1728 timeout.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe 4668 RegAsm.exe -
Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 1956 wrote to memory of 4668 1956 bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe 85 PID 4668 wrote to memory of 2868 4668 RegAsm.exe 95 PID 4668 wrote to memory of 2868 4668 RegAsm.exe 95 PID 4668 wrote to memory of 2868 4668 RegAsm.exe 95 PID 2868 wrote to memory of 1728 2868 cmd.exe 97 PID 2868 wrote to memory of 1728 2868 cmd.exe 97 PID 2868 wrote to memory of 1728 2868 cmd.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe"C:\Users\Admin\AppData\Local\Temp\bf2a40a57140c97f9ea2f587fd21f0c1df4ba22222e93dba9bc3fdb705937da5.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1956 -
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
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4668 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\BKECAEBGHDAE" & exit3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2868 -
C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
PID:1728
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Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
4Credentials In Files
4Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571