Analysis
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max time kernel
152s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 18:33
Static task
static1
Behavioral task
behavioral1
Sample
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe
Resource
win7-20220414-en
General
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Target
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe
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Size
252KB
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MD5
532a6afb45c841f08a0ff9f104559334
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SHA1
2fe9463e271b50907d72174992f4adf5c5c5eace
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SHA256
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62
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SHA512
313db495bc51449b94484e749a2bee932686fabdfcf2e1a6e2c8caa10fe034960408c2f6a9b90f31e3ae55a1881752fab4baf1bae1fc5d14cf073884c358e7a4
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\proverka_stiller.exe" a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe -
Modifies firewall policy service 2 TTPs 3 IoCs
Processes:
proverka_stiller.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" proverka_stiller.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0" proverka_stiller.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile proverka_stiller.exe -
Executes dropped EXE 1 IoCs
Processes:
proverka_stiller.exepid process 4900 proverka_stiller.exe -
Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exe upx C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exe upx -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\proverka_stiller.exe" a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe -
Drops file in System32 directory 2 IoCs
Processes:
svchost.exedescription ioc process File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{ED13EF32-3579-4D46-99F6-5261C12DF193}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{F99C160D-245C-4FB3-A3CF-977EFD0703C7}.catalogItem svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
svchost.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString svchost.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
Processes:
svchost.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exeproverka_stiller.exedescription pid process Token: SeIncreaseQuotaPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeSecurityPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeTakeOwnershipPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeLoadDriverPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeSystemProfilePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeSystemtimePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeProfSingleProcessPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeIncBasePriorityPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeCreatePagefilePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeBackupPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeRestorePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeShutdownPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeDebugPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeSystemEnvironmentPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeChangeNotifyPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeRemoteShutdownPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeUndockPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeManageVolumePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeImpersonatePrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeCreateGlobalPrivilege 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: 33 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: 34 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: 35 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: 36 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe Token: SeIncreaseQuotaPrivilege 4900 proverka_stiller.exe Token: SeSecurityPrivilege 4900 proverka_stiller.exe Token: SeTakeOwnershipPrivilege 4900 proverka_stiller.exe Token: SeLoadDriverPrivilege 4900 proverka_stiller.exe Token: SeSystemProfilePrivilege 4900 proverka_stiller.exe Token: SeSystemtimePrivilege 4900 proverka_stiller.exe Token: SeProfSingleProcessPrivilege 4900 proverka_stiller.exe Token: SeIncBasePriorityPrivilege 4900 proverka_stiller.exe Token: SeCreatePagefilePrivilege 4900 proverka_stiller.exe Token: SeBackupPrivilege 4900 proverka_stiller.exe Token: SeRestorePrivilege 4900 proverka_stiller.exe Token: SeShutdownPrivilege 4900 proverka_stiller.exe Token: SeDebugPrivilege 4900 proverka_stiller.exe Token: SeSystemEnvironmentPrivilege 4900 proverka_stiller.exe Token: SeChangeNotifyPrivilege 4900 proverka_stiller.exe Token: SeRemoteShutdownPrivilege 4900 proverka_stiller.exe Token: SeUndockPrivilege 4900 proverka_stiller.exe Token: SeManageVolumePrivilege 4900 proverka_stiller.exe Token: SeImpersonatePrivilege 4900 proverka_stiller.exe Token: SeCreateGlobalPrivilege 4900 proverka_stiller.exe Token: 33 4900 proverka_stiller.exe Token: 34 4900 proverka_stiller.exe Token: 35 4900 proverka_stiller.exe Token: 36 4900 proverka_stiller.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
proverka_stiller.exepid process 4900 proverka_stiller.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exedescription pid process target process PID 4120 wrote to memory of 4900 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe proverka_stiller.exe PID 4120 wrote to memory of 4900 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe proverka_stiller.exe PID 4120 wrote to memory of 4900 4120 a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe proverka_stiller.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe"C:\Users\Admin\AppData\Local\Temp\a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exe"C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exe"2⤵
- Modifies firewall policy service
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exeFilesize
252KB
MD5532a6afb45c841f08a0ff9f104559334
SHA12fe9463e271b50907d72174992f4adf5c5c5eace
SHA256a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62
SHA512313db495bc51449b94484e749a2bee932686fabdfcf2e1a6e2c8caa10fe034960408c2f6a9b90f31e3ae55a1881752fab4baf1bae1fc5d14cf073884c358e7a4
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C:\Users\Admin\AppData\Roaming\MSDCSC\proverka_stiller.exeFilesize
252KB
MD5532a6afb45c841f08a0ff9f104559334
SHA12fe9463e271b50907d72174992f4adf5c5c5eace
SHA256a0f7c2f2ac9cd595abc825bbed28df20ffdbbf7664269cf3c49c106a267dba62
SHA512313db495bc51449b94484e749a2bee932686fabdfcf2e1a6e2c8caa10fe034960408c2f6a9b90f31e3ae55a1881752fab4baf1bae1fc5d14cf073884c358e7a4
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memory/4900-130-0x0000000000000000-mapping.dmp