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Resubmissions
19/04/2023, 01:43
230419-b5gtaafe75 10Analysis
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max time kernel
143s -
max time network
33s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
19/04/2023, 01:43
Static task
static1
Behavioral task
behavioral1
Sample
ClasSvc.exe
Resource
win7-20230220-en
6 signatures
150 seconds
General
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Target
ClasSvc.exe
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Size
17.1MB
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MD5
305e71ec353a718b055ea9acaa6598a3
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SHA1
3d26bb3b0a669b98c5226bcdd3473440e47162d5
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SHA256
031f9345c33543366e9c66447f4f3fb085a2e04f3c2f98f562f191de6a413dd0
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SHA512
2f9c163ac5e2980825b536b384329714dc602079e4bd0b9e2654df40fcd659e67e4e2a17b338a81fc8ac39e0ff1ae83b625e102f9308a0734948412c4a4dc2eb
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SSDEEP
196608:uNjzJSeEtAVBt4/BixizJcPM5OzQ6UM6pZpKerXvob24hwhxbQLJC:uNjzJSeE0D4KiZ5OyM6pXTrXvMwrbQLM
Malware Config
Signatures
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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-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\International\Geo\Nation ClasSvc.exe -
Checks processor information in registry 2 TTPs 6 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\hardware\description\system\centralProcessor\1 ClasSvc.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\ProcessorNameString ClasSvc.exe Key opened \REGISTRY\MACHINE\hardware\description\system\centralProcessor\2 ClasSvc.exe Key opened \REGISTRY\MACHINE\hardware\description\system\centralProcessor\0 ClasSvc.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString ClasSvc.exe Key opened \REGISTRY\MACHINE\hardware\description\system\centralProcessor\16 ClasSvc.exe -
Suspicious behavior: EnumeratesProcesses 11 IoCs
pid Process 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1708 ClasSvc.exe Token: SeDebugPrivilege 1708 ClasSvc.exe Token: SeTakeOwnershipPrivilege 1776 ClasSvc.exe Token: SeTcbPrivilege 1776 ClasSvc.exe -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1708 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe 1776 ClasSvc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ClasSvc.exe"C:\Users\Admin\AppData\Local\Temp\ClasSvc.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1708 -
C:\Users\Admin\AppData\Local\Temp\ClasSvc.exeC:\Users\Admin\AppData\Local\Temp\ClasSvc.exe -run_agent -second2⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1776
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