Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
27/11/2022, 12:59
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe
Resource
win7-20221111-en
windows7-x64
21 signatures
150 seconds
General
- Target 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe
- Size 315KB
- Sample221127-p73qeshf94
- SHA256 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf
- MD5 6a862dc51bdf3cb9cbcff57bb592546c
- SHA1 51f4bce1b1196e85146bec83a6549763af3f334c
- SHA512 14d8ae5a44e1e1ca0c72e2cb0763f32b24698c0e1219c1e6c6d4b47874f5908678694501e3d20ba0eff149c8c0b0a79447adcddca0f8d665472947edc1f0e267
- SSDEEP 6144:OAsBZxLA8ivLPhyqaShRf9OpRb9tDia3BjoybPDhk8Ni6F9D3qAPqUvtPTiI:SL7iTPhbAp9rznbr5i6F9TFLiI
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Modifies firewall policy service 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile explorer.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" explorer.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile explorer.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\EnableFirewall = "0" explorer.exe - Sets file execution options in registry 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe\Debugger = "ruoosykwq.exe" explorer.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\9ykk3777wm931k.exe 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\9ykk3777wm931k.exe\DisableExceptionChainValidation 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe explorer.exe - Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe - Loads dropped DLL 1 IoCs
pid Process 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe - Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce explorer.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Windows Search 5.3.10 = "C:\\ProgramData\\Windows Search 5.3.10\\9ykk3777wm931k.exe" explorer.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run explorer.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Search 5.3.10 = "\"C:\\ProgramData\\Windows Search 5.3.10\\9ykk3777wm931k.exe\"" explorer.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe - Drops desktop.ini file(s) 2 IoCs
description ioc Process File created C:\ProgramData\Windows Search 5.3.10\desktop.ini 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe File opened for modification C:\ProgramData\Windows Search 5.3.10\desktop.ini 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs
pid Process 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4832 set thread context of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
pid pid_target Process procid_target 5016 4120 WerFault.exe 81 - Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString explorer.exe - Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer explorer.exe - Modifies Internet Explorer Protected Mode 1 TTPs 4 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3" explorer.exe - Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1" explorer.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main explorer.exe - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe 4120 explorer.exe - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe - Suspicious behavior: RenamesItself 1 IoCs
pid Process 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe - Suspicious use of AdjustPrivilegeToken 27 IoCs
description pid Process Token: SeDebugPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeRestorePrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeBackupPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeLoadDriverPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeCreatePagefilePrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeShutdownPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeTakeOwnershipPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeChangeNotifyPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeCreateTokenPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeMachineAccountPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeSecurityPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeAssignPrimaryTokenPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeCreateGlobalPrivilege 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: 33 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe Token: SeDebugPrivilege 4120 explorer.exe Token: SeRestorePrivilege 4120 explorer.exe Token: SeBackupPrivilege 4120 explorer.exe Token: SeLoadDriverPrivilege 4120 explorer.exe Token: SeCreatePagefilePrivilege 4120 explorer.exe Token: SeShutdownPrivilege 4120 explorer.exe Token: SeTakeOwnershipPrivilege 4120 explorer.exe Token: SeChangeNotifyPrivilege 4120 explorer.exe Token: SeCreateTokenPrivilege 4120 explorer.exe Token: SeMachineAccountPrivilege 4120 explorer.exe Token: SeSecurityPrivilege 4120 explorer.exe Token: SeAssignPrimaryTokenPrivilege 4120 explorer.exe Token: SeCreateGlobalPrivilege 4120 explorer.exe - Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 4832 wrote to memory of 1972 4832 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 80 PID 1972 wrote to memory of 4120 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 81 PID 1972 wrote to memory of 4120 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 81 PID 1972 wrote to memory of 4120 1972 4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe"C:\Users\Admin\AppData\Local\Temp\4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4832 -
C:\Users\Admin\AppData\Local\Temp\4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe"C:\Users\Admin\AppData\Local\Temp\4a1da031313919a6c6553d6608869a46f45c81f68290629497f1122615d1a7cf.exe"2⤵
- Sets file execution options in registry
- Checks whether UAC is enabled
- Drops desktop.ini file(s)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: MapViewOfSection
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972 -
C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe3⤵
- Modifies firewall policy service
- Sets file execution options in registry
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer Protected Mode
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4120 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 11324⤵
- Program crash
PID:5016
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4120 -ip 41201⤵PID:1812
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\nsa88DE.tmp\Maurois.dll
- Size 196KB
- SHA256 ea388ed5b8039160d784f24ef2f8d92e5cee8b9caf6de3a1c9924564550f8248
- MD5 05db9e17519dbffe3c4dbb038ec686b1
- SHA1 be88fcf4047938903d1fa6953cf7661c7798f179
- SHA512 29097003d49074b07d9677d3d8d17246222f08300e8871bf3bc0b936c6f1d2dab83eff5f7df40dd68389a70b431ff7e5a8d738b780ab175d11efb94d2b37f0ac
- SSDEEP 6144:kFxGNQvcqiuxUnyORKdIQLiP/5867863EApVAKOCBuHBNmTSIrgMqibOCC/snrdu:k7JiuAy
- MD5 SHA1 SHA512 SSDEEP