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Analysis
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max time kernel
157s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
05/03/2024, 15:10
Static task
static1
Behavioral task
behavioral1
Sample
b500525ec82203429144f30eadc3d602.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
b500525ec82203429144f30eadc3d602.exe
Resource
win10v2004-20240226-en
General
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Target
b500525ec82203429144f30eadc3d602.exe
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Size
108KB
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MD5
b500525ec82203429144f30eadc3d602
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SHA1
b693d7d15674647a7ac8ab4abd41f2ffe84b75e5
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SHA256
e43a687ad1d6dd93157260935d840429b4b650db61bfc8946bf7a0f10a882d4b
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SHA512
cc5e6c9d152718e852e1eb3e9f2f6c71a45abd16cde063b2c7455b61eb26c4aae5ae8fbe8362a2fae3636624a1575b2b80fdea11bf71ff391755acfaeeb82e9d
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SSDEEP
3072:h9fpaVgrXWJuH7RgwiGkfM1+rS3vK0Ya71r:PpQgrmJG7Rg4/+rS3SPm
Malware Config
Signatures
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Modifies firewall policy service 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List b500525ec82203429144f30eadc3d602.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile b500525ec82203429144f30eadc3d602.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications b500525ec82203429144f30eadc3d602.exe Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\P-7-78-8964-9648-3874\wincrs.exe = "C:\\Users\\Admin\\P-7-78-8964-9648-3874\\wincrs.exe:*:Enabled:Microsoft Windows System" b500525ec82203429144f30eadc3d602.exe -
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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation b500525ec82203429144f30eadc3d602.exe -
Executes dropped EXE 2 IoCs
pid Process 4960 wincrs.exe 392 wincrs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft Windows System = "C:\\Users\\Admin\\P-7-78-8964-9648-3874\\wincrs.exe" b500525ec82203429144f30eadc3d602.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1516 set thread context of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 4960 set thread context of 392 4960 wincrs.exe 92 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ b500525ec82203429144f30eadc3d602.exe -
Suspicious use of WriteProcessMemory 23 IoCs
description pid Process procid_target PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 1516 wrote to memory of 2900 1516 b500525ec82203429144f30eadc3d602.exe 88 PID 2900 wrote to memory of 4960 2900 b500525ec82203429144f30eadc3d602.exe 91 PID 2900 wrote to memory of 4960 2900 b500525ec82203429144f30eadc3d602.exe 91 PID 2900 wrote to memory of 4960 2900 b500525ec82203429144f30eadc3d602.exe 91 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92 PID 4960 wrote to memory of 392 4960 wincrs.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\b500525ec82203429144f30eadc3d602.exe"C:\Users\Admin\AppData\Local\Temp\b500525ec82203429144f30eadc3d602.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1516 -
C:\Users\Admin\AppData\Local\Temp\b500525ec82203429144f30eadc3d602.exe"C:\Users\Admin\AppData\Local\Temp\b500525ec82203429144f30eadc3d602.exe"2⤵
- Modifies firewall policy service
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2900 -
C:\Users\Admin\P-7-78-8964-9648-3874\wincrs.exe"C:\Users\Admin\P-7-78-8964-9648-3874\wincrs.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4960 -
C:\Users\Admin\P-7-78-8964-9648-3874\wincrs.exe"C:\Users\Admin\P-7-78-8964-9648-3874\wincrs.exe"4⤵
- Executes dropped EXE
PID:392
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
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Downloads
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Filesize
108KB
MD5b500525ec82203429144f30eadc3d602
SHA1b693d7d15674647a7ac8ab4abd41f2ffe84b75e5
SHA256e43a687ad1d6dd93157260935d840429b4b650db61bfc8946bf7a0f10a882d4b
SHA512cc5e6c9d152718e852e1eb3e9f2f6c71a45abd16cde063b2c7455b61eb26c4aae5ae8fbe8362a2fae3636624a1575b2b80fdea11bf71ff391755acfaeeb82e9d