Analysis Overview
SHA256
df480deb191b335dcbc3d4fc5d59594cb38caee2aaef8d877fbbc573de741301
Threat Level: Known bad
The file 6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.7z was found to be: Known bad.
Malicious Activity Summary
Avoslocker Ransomware
Modifies Installed Components in the registry
Modifies extensions of user files
Enumerates connected drives
Drops file in Windows directory
Suspicious use of AdjustPrivilegeToken
Checks SCSI registry key(s)
Modifies registry class
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious behavior: GetForegroundWindowSpam
Enumerates system info in registry
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-01-23 13:59
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-01-23 13:59
Reported
2022-01-23 13:59
Platform
win10-en-20211208
Max time kernel
14s
Max time network
23s
Command Line
Signatures
Avoslocker Ransomware
Modifies Installed Components in the registry
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\BlockMount.tiff => C:\Users\Admin\Pictures\BlockMount.tiff.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\AssertRedo.raw => C:\Users\Admin\Pictures\AssertRedo.raw.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\UseCompare.png => C:\Users\Admin\Pictures\UseCompare.png.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\RegisterSwitch.crw => C:\Users\Admin\Pictures\RegisterSwitch.crw.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\LimitGrant.crw => C:\Users\Admin\Pictures\LimitGrant.crw.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ExitResume.raw => C:\Users\Admin\Pictures\ExitResume.raw.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\ConvertFromInvoke.png => C:\Users\Admin\Pictures\ConvertFromInvoke.png.avos2 | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\BlockMount.tiff | C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\D: | C:\Windows\explorer.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\rescache\_merged\2717123927\1253081315.pri | C:\Windows\explorer.exe | N/A |
| File created | C:\Windows\rescache\_merged\1601268389\1361672858.pri | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| File created | C:\Windows\rescache\_merged\4183903823\97717462.pri | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
| File created | C:\Windows\rescache\_merged\4032412167\2701812693.pri | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
| File created | C:\Windows\rescache\_merged\4032412167\2701812693.pri | C:\Windows\explorer.exe | N/A |
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\HardwareID | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\ConfigFlags | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Capabilities | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\HardwareID | C:\Windows\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 | C:\Windows\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Capabilities | C:\Windows\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0003 | C:\Windows\explorer.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\ConfigFlags | C:\Windows\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0003 | C:\Windows\explorer.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000 | C:\Windows\explorer.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (data) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff | C:\Windows\explorer.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana\Total = "56" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana\ = "23" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU | C:\Windows\explorer.exe | N/A |
| Set value (data) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance | C:\Windows\explorer.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana\ = "56" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance | C:\Windows\explorer.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\microsoft.windows.cortana | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\windows.cortana | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "185" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana\Total = "23" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings | C:\Windows\explorer.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DomStorageState | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\Total | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-369956170-74428499-1628131376-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "152" | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\explorer.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\explorer.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe | N/A |
| N/A | N/A | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
| N/A | N/A | C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe
"C:\Users\Admin\AppData\Local\Temp\6cc510a772d7718c95216eb56a84a96201241b264755f28875e685f06e95e1a2.exe"
C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\e7b43f0d20004bd9b2994754695de3e1 /t 2900 /p 2892
C:\Windows\explorer.exe
explorer.exe
C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
"C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
Network
Files
memory/3212-115-0x0000000002EA0000-0x0000000002EA1000-memory.dmp