Analysis Overview
SHA256
c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459
Threat Level: Known bad
The file sigmarizzler.exe was found to be: Known bad.
Malicious Activity Summary
Orcus
Orcus family
Loads dropped DLL
Executes dropped EXE
Checks computer location settings
Drops desktop.ini file(s)
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-26 18:55
Signatures
Orcus family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-26 18:55
Reported
2024-11-26 18:57
Platform
win7-20240903-en
Max time kernel
146s
Max time network
150s
Command Line
Signatures
Orcus
Orcus family
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1668 wrote to memory of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
| PID 1668 wrote to memory of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
| PID 1668 wrote to memory of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
| PID 1668 wrote to memory of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe
"C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe"
C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp |
Files
memory/1668-0-0x0000000074611000-0x0000000074612000-memory.dmp
memory/1668-1-0x0000000074610000-0x0000000074BBB000-memory.dmp
memory/1668-2-0x0000000074610000-0x0000000074BBB000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
| MD5 | 40c7a4426aedab088a4704c699caf3a4 |
| SHA1 | 558dcd92d48d4827d9ae252f5cccc5377cb78efd |
| SHA256 | c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459 |
| SHA512 | c5bfca766cbd7858798fc9f14f1a16789f64864ba380c7a61b830812753da92ff2463dd0a22f054a85c4166a96a0068286dee2bb640bf24c9572a2b6d3d48218 |
memory/1668-12-0x0000000074610000-0x0000000074BBB000-memory.dmp
memory/3060-13-0x0000000074610000-0x0000000074BBB000-memory.dmp
memory/3060-11-0x0000000074610000-0x0000000074BBB000-memory.dmp
memory/3060-14-0x0000000074610000-0x0000000074BBB000-memory.dmp
memory/3060-15-0x0000000074610000-0x0000000074BBB000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-26 18:55
Reported
2024-11-26 18:57
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
151s
Command Line
Signatures
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\assembly | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3484 wrote to memory of 1884 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
| PID 3484 wrote to memory of 1884 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
| PID 3484 wrote to memory of 1884 | N/A | C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe | C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe
"C:\Users\Admin\AppData\Local\Temp\sigmarizzler.exe"
C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| N/A | 192.168.0.122:1234 | tcp | |
| US | 8.8.8.8:53 | 17.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| US | 8.8.8.8:53 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp | |
| N/A | 192.168.0.122:1234 | tcp |
Files
memory/3484-0-0x00000000752B2000-0x00000000752B3000-memory.dmp
memory/3484-1-0x00000000752B0000-0x0000000075861000-memory.dmp
memory/3484-2-0x00000000752B0000-0x0000000075861000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Speech\AudioDriver.exe
| MD5 | 40c7a4426aedab088a4704c699caf3a4 |
| SHA1 | 558dcd92d48d4827d9ae252f5cccc5377cb78efd |
| SHA256 | c9cad5e9456b15ba20ba8e45ea72a75c5496928d9cb5614482c43979d0882459 |
| SHA512 | c5bfca766cbd7858798fc9f14f1a16789f64864ba380c7a61b830812753da92ff2463dd0a22f054a85c4166a96a0068286dee2bb640bf24c9572a2b6d3d48218 |
memory/1884-18-0x00000000752B0000-0x0000000075861000-memory.dmp
memory/1884-20-0x00000000752B0000-0x0000000075861000-memory.dmp
memory/3484-19-0x00000000752B0000-0x0000000075861000-memory.dmp
memory/1884-21-0x00000000752B0000-0x0000000075861000-memory.dmp
memory/1884-22-0x00000000752B0000-0x0000000075861000-memory.dmp