Analysis Overview
SHA256
54ecf97fe6dc81aca8e7f68df713edebfd020c0eff68a1919bef11bd32136dcd
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-03 17:34
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
2024-11-03 17:34
Reported
2024-11-03 17:36
Platform
win7-20240903-en
Max time kernel
146s
Max time network
149s
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\Client-built.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 WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "java updater" /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 "java updater" /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 | Inversin-43597.portmap.host | udp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
Files
memory/2692-0-0x000007FEF61F3000-0x000007FEF61F4000-memory.dmp
memory/2692-1-0x0000000001240000-0x0000000001564000-memory.dmp
memory/2692-2-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 3a96e758409eeabc8836a8665980e01b |
| SHA1 | 50f6950089a997ccdac2c0790f4745bb84792a32 |
| SHA256 | 54ecf97fe6dc81aca8e7f68df713edebfd020c0eff68a1919bef11bd32136dcd |
| SHA512 | f07548c69a5280fbac5fa28c1cad876fe0329757990b6f04200f8d1ab2f30a87cfdb784d2cb3364d72b2538360200c79582a22d094bd5165890876b8003807c8 |
memory/2692-7-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp
memory/3024-9-0x0000000000170000-0x0000000000494000-memory.dmp
memory/3024-8-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp
memory/3024-10-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp
memory/3024-11-0x000007FEF61F0000-0x000007FEF6BDC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-03 17:34
Reported
2024-11-03 17:36
Platform
win10v2004-20241007-en
Max time kernel
144s
Max time network
151s
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\Client-built.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 |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| 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 |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4788 wrote to memory of 4004 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4788 wrote to memory of 4004 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4788 wrote to memory of 812 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4788 wrote to memory of 812 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 812 wrote to memory of 1156 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 812 wrote to memory of 1156 | 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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "java updater" /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 "java updater" /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 | 209.205.72.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | Inversin-43597.portmap.host | udp |
| DE | 193.161.193.99:43597 | Inversin-43597.portmap.host | tcp |
| US | 8.8.8.8:53 | 99.193.161.193.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.163.202.172.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.49.80.91.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 10.27.171.150.in-addr.arpa | udp |
Files
memory/4788-1-0x0000000000460000-0x0000000000784000-memory.dmp
memory/4788-0-0x00007FFE3D2D3000-0x00007FFE3D2D5000-memory.dmp
memory/4788-2-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 3a96e758409eeabc8836a8665980e01b |
| SHA1 | 50f6950089a997ccdac2c0790f4745bb84792a32 |
| SHA256 | 54ecf97fe6dc81aca8e7f68df713edebfd020c0eff68a1919bef11bd32136dcd |
| SHA512 | f07548c69a5280fbac5fa28c1cad876fe0329757990b6f04200f8d1ab2f30a87cfdb784d2cb3364d72b2538360200c79582a22d094bd5165890876b8003807c8 |
memory/4788-9-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp
memory/812-8-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp
memory/812-10-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp
memory/812-11-0x000000001C9A0000-0x000000001C9F0000-memory.dmp
memory/812-12-0x000000001CAB0000-0x000000001CB62000-memory.dmp
memory/812-16-0x000000001CA50000-0x000000001CA8C000-memory.dmp
memory/812-15-0x000000001C9F0000-0x000000001CA02000-memory.dmp
memory/812-17-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp
memory/812-18-0x00007FFE3D2D0000-0x00007FFE3DD91000-memory.dmp