Analysis Overview
SHA256
42ade491c67312ca29a4d2ab39df56ce9dd29f6c76c8064bd2f87383e814a9eb
Threat Level: Known bad
The file Update.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Drops file in Program Files directory
Unsigned PE
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious use of FindShellTrayWindow
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-26 01:27
Signatures
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-26 01:27
Reported
2023-12-26 01:30
Platform
win11-20231215-en
Max time kernel
168s
Max time network
173s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Update.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Program Files\SubDir\Update.exe | C:\Program Files\SubDir\Update.exe | N/A |
| File opened for modification | C:\Program Files\SubDir | C:\Program Files\SubDir\Update.exe | N/A |
| File created | C:\Program Files\SubDir\Update.exe | C:\Users\Admin\AppData\Local\Temp\Update.exe | N/A |
| File opened for modification | C:\Program Files\SubDir\Update.exe | C:\Users\Admin\AppData\Local\Temp\Update.exe | N/A |
| File opened for modification | C:\Program Files\SubDir | C:\Users\Admin\AppData\Local\Temp\Update.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Update.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files\SubDir\Update.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Update.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Update.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\SubDir\Update.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4288 wrote to memory of 3604 | N/A | C:\Users\Admin\AppData\Local\Temp\Update.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4288 wrote to memory of 3604 | N/A | C:\Users\Admin\AppData\Local\Temp\Update.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4288 wrote to memory of 3192 | N/A | C:\Users\Admin\AppData\Local\Temp\Update.exe | C:\Program Files\SubDir\Update.exe |
| PID 4288 wrote to memory of 3192 | N/A | C:\Users\Admin\AppData\Local\Temp\Update.exe | C:\Program Files\SubDir\Update.exe |
| PID 3192 wrote to memory of 2008 | N/A | C:\Program Files\SubDir\Update.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3192 wrote to memory of 2008 | N/A | C:\Program Files\SubDir\Update.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Update.exe
"C:\Users\Admin\AppData\Local\Temp\Update.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Update2.exe" /sc ONLOGON /tr "C:\Program Files\SubDir\Update.exe" /rl HIGHEST /f
C:\Program Files\SubDir\Update.exe
"C:\Program Files\SubDir\Update.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Update2.exe" /sc ONLOGON /tr "C:\Program Files\SubDir\Update.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 16.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp | |
| N/A | 127.0.0.1:8080 | tcp |
Files
memory/4288-0-0x0000000000290000-0x00000000005FA000-memory.dmp
memory/4288-1-0x00007FFCADAE0000-0x00007FFCAE5A2000-memory.dmp
memory/4288-2-0x0000000002730000-0x0000000002740000-memory.dmp
C:\Program Files\SubDir\Update.exe
| MD5 | f18ad4d563f71b31f1671cc53254ceed |
| SHA1 | 10717c0e669dfb725a227031142fea305189c741 |
| SHA256 | 42ade491c67312ca29a4d2ab39df56ce9dd29f6c76c8064bd2f87383e814a9eb |
| SHA512 | dff0521b3d80e1f507503a675854a87a9a3da785870485fd184532229622feceb855a55822ee68a629415e810fc77e25b58b10d25cb88c42f5215e97ad185890 |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Update.exe.log
| MD5 | b4e91d2e5f40d5e2586a86cf3bb4df24 |
| SHA1 | 31920b3a41aa4400d4a0230a7622848789b38672 |
| SHA256 | 5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210 |
| SHA512 | 968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319 |
memory/4288-10-0x00007FFCADAE0000-0x00007FFCAE5A2000-memory.dmp
memory/3192-11-0x00007FFCADAE0000-0x00007FFCAE5A2000-memory.dmp
memory/3192-12-0x000000001B300000-0x000000001B310000-memory.dmp
memory/3192-13-0x000000001BF50000-0x000000001BFA0000-memory.dmp
memory/3192-14-0x000000001C060000-0x000000001C112000-memory.dmp
memory/3192-15-0x00007FFCADAE0000-0x00007FFCAE5A2000-memory.dmp
memory/3192-16-0x000000001B300000-0x000000001B310000-memory.dmp