Analysis Overview
SHA256
1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dcc
Threat Level: Shows suspicious behavior
The file 1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Adds Run key to start application
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-09 00:01
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-09 00:01
Reported
2024-11-09 00:03
Platform
win7-20240903-en
Max time kernel
120s
Max time network
16s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
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\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| N/A | N/A | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3056 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
| PID 3056 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
| PID 3056 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
| PID 3056 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe
"C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe"
C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.exe"
Network
Files
C:\Users\Public\Microsoft Build\Isass.exe
| MD5 | cba407a414f71048711865525583a320 |
| SHA1 | 6722724f204ef6bd9a3937e04c4b2ab8a644d8b1 |
| SHA256 | 1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dcc |
| SHA512 | 1f00e7a3a33bdafb71dc0d74f9b646b555b6b733da47f5978061118c48f382023d0b9014217651bca07d7fa2112f038a1c16960c60f3283a3b292cf347a62fcc |
memory/3056-8-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/3056-12-0x0000000004610000-0x00000000058B8000-memory.dmp
memory/3056-13-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-15-0x00000000003B0000-0x00000000003B1000-memory.dmp
memory/2312-14-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/3056-9-0x0000000004610000-0x00000000058B8000-memory.dmp
memory/2312-16-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-17-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-20-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-21-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-28-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-29-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-37-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-38-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-44-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-45-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-52-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/2312-53-0x0000000004630000-0x00000000058D8000-memory.dmp
memory/2312-54-0x0000000000400000-0x00000000016A8000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-09 00:01
Reported
2024-11-09 00:03
Platform
win10v2004-20241007-en
Max time kernel
120s
Max time network
95s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Users\\Public\\Microsoft Build\\Isass.exe" | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
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\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | N/A |
| N/A | N/A | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
| N/A | N/A | C:\Users\Public\Microsoft Build\Isass.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4648 wrote to memory of 4744 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
| PID 4648 wrote to memory of 4744 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
| PID 4648 wrote to memory of 4744 | N/A | C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe | C:\Users\Public\Microsoft Build\Isass.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe
"C:\Users\Admin\AppData\Local\Temp\1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dccN.exe"
C:\Users\Public\Microsoft Build\Isass.exe
"C:\Users\Public\Microsoft Build\Isass.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 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.42.69.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
Files
C:\Users\Public\Microsoft Build\Isass.exe
| MD5 | cba407a414f71048711865525583a320 |
| SHA1 | 6722724f204ef6bd9a3937e04c4b2ab8a644d8b1 |
| SHA256 | 1cb4224c524447bf801b2b19e23f48f9ad083bbbc9f89c24d418e213f99b6dcc |
| SHA512 | 1f00e7a3a33bdafb71dc0d74f9b646b555b6b733da47f5978061118c48f382023d0b9014217651bca07d7fa2112f038a1c16960c60f3283a3b292cf347a62fcc |
memory/4648-2-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4648-3-0x0000000001D40000-0x0000000001D41000-memory.dmp
memory/4744-6-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-7-0x00000000001E0000-0x00000000001E1000-memory.dmp
memory/4648-9-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-10-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-11-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-14-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-15-0x0000000000400000-0x00000000016A8000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
| MD5 | e10d4b7a6adf1aafba381a2a88bfb50b |
| SHA1 | 14e38a0c03ecadac18063a9e8c8ec84295352531 |
| SHA256 | d9d2e84d27db85f76e8eb4316f258460fdc2977286b4f344026181109c4f72bd |
| SHA512 | 4fbc9242f0fb14dbbe83ad3bb6962f2baa45ef716d67c927508b78fe176cca64075a9474e3c3716916e332166355f68e86d70b277274bc1bb4ae7a726b3aa160 |
memory/4744-19-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-20-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-25-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-29-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-35-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-36-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-43-0x0000000000400000-0x00000000016A8000-memory.dmp
memory/4744-44-0x0000000000400000-0x00000000016A8000-memory.dmp