Analysis Overview
SHA256
7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69
Threat Level: Known bad
The file client.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Drops file in Drivers directory
Executes dropped EXE
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Uses Task Scheduler COM API
Runs ping.exe
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-25 01:25
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
2024-05-25 01:25
Reported
2024-05-25 01:56
Platform
win11-20240508-en
Max time kernel
1383s
Max time network
1172s
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 |
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\drivers\watchdog.exe | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers\watchdog.exe | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers\watchdog.exe | C:\Windows\system32\drivers\watchdog.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Application.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-Sysmon%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Security.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\OAlerts.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-GroupPolicy%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\System.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-WinINet-Config%4ProxyConfigChanged.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Internet Explorer.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Key Management Service.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-LiveId%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-Kernel-Cache%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-CloudStore%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\HardwareEvents.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-HotspotAuth%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-AppModel-Runtime%4Admin.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-NCSI%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Windows PowerShell.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-Storage-Storport%4Health.evtx | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\system32\drivers | C:\Windows\system32\drivers\watchdog.exe | N/A |
| File opened for modification | C:\Windows\System32\Winevt\Logs\Microsoft-Windows-Storage-Storport%4Operational.evtx | C:\Windows\System32\svchost.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\ServiceState\EventLog\Data\lastalive0.dat | C:\Windows\System32\svchost.exe | N/A |
| File opened for modification | C:\Windows\ServiceState\EventLog\Data\lastalive1.dat | C:\Windows\System32\svchost.exe | N/A |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\System32\svchost.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\System32\svchost.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 |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\PING.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\drivers\watchdog.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f
C:\Windows\system32\drivers\watchdog.exe
"C:\Windows\system32\drivers\watchdog.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "watchdog" /sc ONLOGON /tr "C:\Windows\system32\drivers\watchdog.exe" /rl HIGHEST /f
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /delete /tn "watchdog" /f
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CSz9IKETpQUc.bat" "
C:\Windows\system32\chcp.com
chcp 65001
C:\Windows\system32\PING.EXE
ping -n 10 localhost
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k osprivacy -p -s camsvc
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| CA | 142.115.43.39:8080 | tcp | |
| DE | 195.201.57.90:443 | ipwho.is | 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 |
Files
memory/4380-0-0x00007FFB728F3000-0x00007FFB728F5000-memory.dmp
memory/4380-1-0x0000000000D20000-0x0000000001044000-memory.dmp
memory/4380-2-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
C:\Windows\System32\drivers\watchdog.exe
| MD5 | 4dfff8420e0d2f3a0e30a3ae8e005830 |
| SHA1 | 379546834fa347bdcf6a4aa1a9d956b540d33b55 |
| SHA256 | 7869d203ee2ffc4d75d4d542cc2e3a970ca249d675e8bc7bd4f9cc85c80cab69 |
| SHA512 | 6f4de859019a9ed236f6ddcbb03737c9e643368ae74fea3b36f7254a1b691448fb5f5befe4997554ed96f099309908f6b0a42d46161d3727d07620b1ecca94cb |
memory/4380-9-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
memory/4524-10-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
memory/4524-11-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
memory/4524-12-0x000000001B860000-0x000000001B8B0000-memory.dmp
memory/4524-13-0x000000001B970000-0x000000001BA22000-memory.dmp
memory/4524-14-0x000000001B8D0000-0x000000001B8E2000-memory.dmp
memory/4524-15-0x000000001B930000-0x000000001B96C000-memory.dmp
memory/4524-16-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
memory/4524-22-0x00007FFB728F0000-0x00007FFB733B2000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\CSz9IKETpQUc.bat
| MD5 | 786250ed1b549ef81c2ae3ec0e66e4b7 |
| SHA1 | 9e9d5114974b5addf50b1ce29cf43f4d7dbc34c1 |
| SHA256 | 03b7026273b556cdddcf25c6b35a3e78a4f9c7bc654681a5a744ac3eb9165c05 |
| SHA512 | 8a68f0b069abe6e8deb9d2d43e7e0c864c80bacc5582a5577b2cbc42c091d90ce832fbb8ac7ae9727945888efad0ff2b8762e33b4b67103c8e3ec8ce1f9e31b8 |