Analysis Overview
SHA256
a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b
Threat Level: Known bad
The file cclent.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-12-13 10:02
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
2024-12-13 10:02
Reported
2024-12-13 10:04
Platform
win7-20240903-en
Max time kernel
148s
Max time network
150s
Command Line
Signatures
Quasar RAT
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| 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:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Enumerates physical storage devices
Scheduled Task/Job: Scheduled Task
| 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\cclent.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\cclent.exe
"C:\Users\Admin\AppData\Local\Temp\cclent.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "vchost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "vchost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp |
Files
memory/2360-0-0x000007FEF5803000-0x000007FEF5804000-memory.dmp
memory/2360-1-0x0000000001350000-0x0000000001674000-memory.dmp
memory/2360-2-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 94222631ef1071a4f7ceb180cf8a4a5a |
| SHA1 | 786d8b2d8b931a9282ee54367d2dda501f1ca946 |
| SHA256 | a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b |
| SHA512 | 00503983a35e8d0f65eea6a811d7177a389cb1b4d8716d32e50fd5346deb428cd472cbaca7375c56ac3f113ea76db55322993b4d68d816b50a4b27887a2fa14d |
memory/1160-8-0x0000000000AB0000-0x0000000000DD4000-memory.dmp
memory/1160-10-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
memory/2360-9-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
memory/1160-11-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
memory/1160-12-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-12-13 10:02
Reported
2024-12-13 10:04
Platform
win10v2004-20241007-en
Max time kernel
134s
Max time network
144s
Command Line
Signatures
Quasar RAT
Quasar family
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:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Enumerates physical storage devices
Scheduled Task/Job: Scheduled Task
| 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\cclent.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4684 wrote to memory of 1152 | N/A | C:\Users\Admin\AppData\Local\Temp\cclent.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4684 wrote to memory of 1152 | N/A | C:\Users\Admin\AppData\Local\Temp\cclent.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4684 wrote to memory of 3112 | N/A | C:\Users\Admin\AppData\Local\Temp\cclent.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4684 wrote to memory of 3112 | N/A | C:\Users\Admin\AppData\Local\Temp\cclent.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3112 wrote to memory of 3508 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3112 wrote to memory of 3508 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\cclent.exe
"C:\Users\Admin\AppData\Local\Temp\cclent.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "vchost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "vchost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| NL | 91.92.243.191:5401 | tcp | |
| US | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| NL | 91.92.243.191:5401 | tcp | |
| US | 8.8.8.8:53 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp | |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| NL | 91.92.243.191:5401 | tcp | |
| NL | 91.92.243.191:5401 | tcp |
Files
memory/4684-0-0x00007FFD55DD3000-0x00007FFD55DD5000-memory.dmp
memory/4684-1-0x0000000000530000-0x0000000000854000-memory.dmp
memory/4684-2-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 94222631ef1071a4f7ceb180cf8a4a5a |
| SHA1 | 786d8b2d8b931a9282ee54367d2dda501f1ca946 |
| SHA256 | a45b373b780f5b9fcf5c51473c69bbf0ed650f300523097602b35f5222bd122b |
| SHA512 | 00503983a35e8d0f65eea6a811d7177a389cb1b4d8716d32e50fd5346deb428cd472cbaca7375c56ac3f113ea76db55322993b4d68d816b50a4b27887a2fa14d |
memory/3112-9-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp
memory/4684-10-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp
memory/3112-11-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp
memory/3112-12-0x000000001E050000-0x000000001E0A0000-memory.dmp
memory/3112-13-0x000000001E160000-0x000000001E212000-memory.dmp
memory/3112-14-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp