Analysis
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max time kernel
135s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
14-06-2023 08:59
Behavioral task
behavioral1
Sample
KRNLExecutor.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
KRNLExecutor.exe
Resource
win10v2004-20230220-en
General
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Target
KRNLExecutor.exe
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Size
41KB
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MD5
d1a288a97979ddd09085cc9ad0162b62
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SHA1
d213f7f6f069db9c1fb72cb76ca4440541461c7c
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SHA256
1e0474476d1eba6ed4ea3e6c2bdc368412f60862db3ee84e096eb800a8c884bc
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SHA512
ff143047d8278c16c2fb139ac7318d0dd8f92f4b46f35c18c19f58e254eb1e79d259d1365ad458f656b089c66918c7bf4fe5cc7a9c826d0754ac31b249317947
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SSDEEP
768:nscaIiIq3KHWOJTw3quZ5e9WTjoKZKfgm3Eh41:sc1KKHHo9e9WT8F7Ee1
Malware Config
Extracted
mercurialgrabber
https://discord.com/api/webhooks/1118262451083939971/HmXFycDXvS2LObQqqJVwfiGcZuZwJqZAp7f-PUmUyVxXQyBedsiYC04ShgyVOokXniGF
Signatures
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Mercurial Grabber Stealer
Mercurial Grabber is an open source stealer targeting Chrome, Discord and some game clients as well as generic system information.
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Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
Processes:
KRNLExecutor.exedescription ioc process Key opened \REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions KRNLExecutor.exe -
Looks for VMWare Tools registry key 2 TTPs 1 IoCs
Processes:
KRNLExecutor.exedescription ioc process Key opened \REGISTRY\MACHINE\SOFTWARE\VMWare, Inc.\VMWare Tools KRNLExecutor.exe -
Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
KRNLExecutor.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion KRNLExecutor.exe -
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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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 1 ip4.seeip.org 2 ip4.seeip.org 3 ip4.seeip.org 21 ip-api.com -
Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
KRNLExecutor.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum KRNLExecutor.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 KRNLExecutor.exe -
Checks SCSI registry key(s) 3 TTPs 1 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
KRNLExecutor.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_VMware_&Prod_VMware_Virtual_S KRNLExecutor.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
KRNLExecutor.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 KRNLExecutor.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString KRNLExecutor.exe -
Enumerates system info in registry 2 TTPs 4 IoCs
Processes:
KRNLExecutor.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemManufacturer KRNLExecutor.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemProductName KRNLExecutor.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Logical Unit Id 0 KRNLExecutor.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosInformation KRNLExecutor.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
KRNLExecutor.exedescription pid process Token: SeDebugPrivilege 3260 KRNLExecutor.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\KRNLExecutor.exe"C:\Users\Admin\AppData\Local\Temp\KRNLExecutor.exe"1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Checks SCSI registry key(s)
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:3260