Analysis Overview
SHA256
75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b
Threat Level: Known bad
The file 75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b was found to be: Known bad.
Malicious Activity Summary
TA505
Blocklisted process makes network request
Sets service image path in registry
Drops file in Windows directory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies data under HKEY_USERS
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-02-01 01:41
Signatures
Analysis: behavioral2
Detonation Overview
Submitted
2022-02-01 01:41
Reported
2022-02-01 01:44
Platform
win10v2004-en-20220113
Max time kernel
165s
Max time network
174s
Command Line
Signatures
TA505
Blocklisted process makes network request
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Sets service image path in registry
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\WindowsUpdate.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.edb | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm | C:\Windows\system32\svchost.exe | N/A |
| File opened for modification | C:\Windows\SoftwareDistribution\ReportingEvents.log | C:\Windows\system32\svchost.exe | N/A |
Modifies data under HKEY_USERS
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
| Key created | \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople | C:\Windows\System32\WaaSMedicAgent.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeShutdownPrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\system32\svchost.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4688 wrote to memory of 4872 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4688 wrote to memory of 4872 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4688 wrote to memory of 4872 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b.dll,#1
C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe ef715bfd459fbd6d1a3c0f627c12789b NVG2SM/LfUGScfRBoNVdNQ.0.1.0.0.0
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
Network
| Country | Destination | Domain | Proto |
| IE | 40.126.31.137:443 | tcp | |
| US | 8.8.8.8:53 | crl3.digicert.com | udp |
| US | 93.184.220.29:80 | crl3.digicert.com | tcp |
| US | 8.8.8.8:53 | windows-msd-update.com | udp |
| US | 194.195.211.26:443 | windows-msd-update.com | tcp |
| US | 8.8.8.8:53 | settings-win.data.microsoft.com | udp |
| US | 52.167.249.196:443 | settings-win.data.microsoft.com | tcp |
| US | 8.8.8.8:53 | settings-win.data.microsoft.com | udp |
| NL | 51.124.78.146:443 | settings-win.data.microsoft.com | tcp |
| NL | 51.124.78.146:443 | settings-win.data.microsoft.com | tcp |
| NL | 51.124.78.146:443 | settings-win.data.microsoft.com | tcp |
| NL | 51.124.78.146:443 | settings-win.data.microsoft.com | tcp |
Files
memory/4872-133-0x0000000075750000-0x0000000075790000-memory.dmp
memory/4512-134-0x000001EDF89A0000-0x000001EDF89B0000-memory.dmp
memory/4512-141-0x000001EDFB720000-0x000001EDFB724000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-01 01:41
Reported
2022-02-01 01:44
Platform
win7-en-20211208
Max time kernel
119s
Max time network
119s
Command Line
Signatures
TA505
Blocklisted process makes network request
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 956 wrote to memory of 1272 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\75e8bd6d7efcb1598daeec50681cb4cf5c3b06e09d12c0bb75d6a5011469754b.dll,#1
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | windows-msd-update.com | udp |
| US | 194.195.211.26:443 | windows-msd-update.com | tcp |
Files
memory/1272-54-0x00000000756C1000-0x00000000756C3000-memory.dmp
memory/1272-55-0x0000000074560000-0x00000000745A0000-memory.dmp