Analysis Overview
SHA256
8e3601302c0294914808b6537cd27de961d087ba0807590b981b7f8c8aa5eee6
Threat Level: Known bad
The file skuld.exe was found to be: Known bad.
Malicious Activity Summary
Skuld family
Adds Run key to start application
Unsigned PE
Views/modifies file attributes
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-17 10:19
Signatures
Skuld family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-17 10:18
Reported
2024-11-17 10:21
Platform
win7-20240903-en
Max time kernel
122s
Max time network
127s
Command Line
Signatures
Processes
C:\Users\Admin\AppData\Local\Temp\skuld.exe
"C:\Users\Admin\AppData\Local\Temp\skuld.exe"
Network
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-17 10:18
Reported
2024-11-17 10:21
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
156s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek HD Audio Universal Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Protect\\SecurityHealthSystray.exe" | C:\Users\Admin\AppData\Local\Temp\skuld.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\skuld.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3552 wrote to memory of 4520 | N/A | C:\Users\Admin\AppData\Local\Temp\skuld.exe | C:\Windows\system32\attrib.exe |
| PID 3552 wrote to memory of 4520 | N/A | C:\Users\Admin\AppData\Local\Temp\skuld.exe | C:\Windows\system32\attrib.exe |
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\skuld.exe
"C:\Users\Admin\AppData\Local\Temp\skuld.exe"
C:\Windows\system32\attrib.exe
attrib +h +s C:\Users\Admin\AppData\Local\Temp\skuld.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 53.210.109.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 12.173.189.20.in-addr.arpa | udp |