Analysis Overview
SHA256
48d4fde21b28f0614fdf124f83f5594bddc13292f21b775da58b017385a49b01
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 AdjustPrivilegeToken
Uses Task Scheduler COM API
Suspicious use of FindShellTrayWindow
Scheduled Task/Job: Scheduled Task
Suspicious use of WriteProcessMemory
Suspicious use of SendNotifyMessage
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-03 19:55
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 19:55
Reported
2024-11-03 19:58
Platform
win7-20241010-en
Max time kernel
120s
Max time network
125s
Command Line
Signatures
Quasar RAT
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Scheduled Task/Job: Scheduled Task
| Description | Indicator | Process | Target |
| 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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2892 wrote to memory of 2224 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\schtasks.exe |
| PID 2892 wrote to memory of 2224 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\system32\schtasks.exe |
| PID 2892 wrote to memory of 2224 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.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
Network
Files
memory/2892-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp
memory/2892-1-0x0000000000DC0000-0x00000000010E4000-memory.dmp
memory/2892-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp
memory/2892-4-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp
memory/2892-5-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-03 19:55
Reported
2024-11-03 19:58
Platform
win10v2004-20241007-en
Max time kernel
148s
Max time network
155s
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 |
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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 800 wrote to memory of 1368 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 800 wrote to memory of 1368 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 800 wrote to memory of 1016 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 800 wrote to memory of 1016 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1016 wrote to memory of 3172 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1016 wrote to memory of 3172 | 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 | 13.86.106.20.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 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 4.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.193.161.193.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 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 150.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.243.111.52.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 | 88.156.103.20.in-addr.arpa | udp |
Files
memory/800-0-0x00007FFEB4173000-0x00007FFEB4175000-memory.dmp
memory/800-1-0x0000000000870000-0x0000000000B94000-memory.dmp
memory/800-2-0x00007FFEB4170000-0x00007FFEB4C31000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | f5b93af3ee1b64dacd2bac9ba4af9b27 |
| SHA1 | 1f2a038199a71a2b917dca4dff2f5fac5e840978 |
| SHA256 | 48d4fde21b28f0614fdf124f83f5594bddc13292f21b775da58b017385a49b01 |
| SHA512 | 83703b0f567723abe3d6b34bd419be5df3475e049ae8893993fec017da9a420cd875184c570bdffbfc0bccac662762991885dea8ebcc2af172b3aac2fb00a302 |
memory/800-8-0x00007FFEB4170000-0x00007FFEB4C31000-memory.dmp
memory/1016-9-0x00007FFEB4170000-0x00007FFEB4C31000-memory.dmp
memory/1016-10-0x00007FFEB4170000-0x00007FFEB4C31000-memory.dmp
memory/1016-11-0x000000001C460000-0x000000001C4B0000-memory.dmp
memory/1016-12-0x000000001C570000-0x000000001C622000-memory.dmp
memory/1016-15-0x000000001C430000-0x000000001C442000-memory.dmp
memory/1016-16-0x000000001C4F0000-0x000000001C52C000-memory.dmp
memory/1016-17-0x00007FFEB4170000-0x00007FFEB4C31000-memory.dmp