Analysis
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max time kernel
78s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
27-05-2024 01:28
Static task
static1
Behavioral task
behavioral1
Sample
b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe
Resource
win10v2004-20240426-en
General
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Target
b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe
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Size
2.0MB
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MD5
f5134de60a5a3717608dfe8baa2d2580
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SHA1
7c87ef2bb65cc76a942ce307e822b5cec80f1ff3
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SHA256
b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29
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SHA512
b574af8b03ffb96397d98a7cf1fef36b1fe3c2dc449bb57cf2de62f75ba70bcbd77b4f15283c80b939fa04d2911893a177b86f8cb89a463d11b6524df7ea3644
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SSDEEP
49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ
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 14 IoCs
Processes:
resource yara_rule behavioral1/memory/1500-2-0x00000000040F0000-0x0000000004239000-memory.dmp family_vidar_v7 behavioral1/memory/3372-9-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-17-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-18-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-35-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-36-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-52-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-53-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-64-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-65-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-66-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/3372-67-0x0000000000400000-0x0000000000646000-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:
kat7119.tmpdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation kat7119.tmp -
Executes dropped EXE 1 IoCs
Processes:
kat7119.tmppid process 3372 kat7119.tmp -
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:
b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exedescription pid process target process PID 1500 set thread context of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp -
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:
kat7119.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7119.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1192 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
kat7119.tmppid process 3372 kat7119.tmp 3372 kat7119.tmp 3372 kat7119.tmp 3372 kat7119.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exekat7119.tmpcmd.exedescription pid process target process PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 1500 wrote to memory of 3372 1500 b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe kat7119.tmp PID 3372 wrote to memory of 2400 3372 kat7119.tmp cmd.exe PID 3372 wrote to memory of 2400 3372 kat7119.tmp cmd.exe PID 3372 wrote to memory of 2400 3372 kat7119.tmp cmd.exe PID 2400 wrote to memory of 1192 2400 cmd.exe timeout.exe PID 2400 wrote to memory of 1192 2400 cmd.exe timeout.exe PID 2400 wrote to memory of 1192 2400 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe"C:\Users\Admin\AppData\Local\Temp\b8796eb6af6a2bf36e6d3e35738cdd2cb41e9f4e2ef1d6ec9678dd88e03c3f29.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat7119.tmpC:\Users\Admin\AppData\Local\Temp\kat7119.tmp2⤵
- Checks computer location settings
- Executes dropped EXE
- 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 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7119.tmp" & rd /s /q "C:\ProgramData\CFIIIJJKJKFH" & 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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C:\Users\Admin\AppData\Local\Temp\kat7119.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/1500-10-0x0000000000400000-0x0000000000612000-memory.dmpFilesize
2.1MB
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memory/1500-2-0x00000000040F0000-0x0000000004239000-memory.dmpFilesize
1.3MB
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memory/1500-0-0x0000000002270000-0x0000000002271000-memory.dmpFilesize
4KB
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memory/3372-18-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-36-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-17-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-9-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-20-0x000000001B850000-0x000000001BAAF000-memory.dmpFilesize
2.4MB
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memory/3372-35-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-52-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-53-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-64-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-65-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-66-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/3372-67-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB