Analysis Overview
SHA256
e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff
Threat Level: Known bad
The file Pearjumper.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-02 04:54
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: behavioral2
Detonation Overview
Submitted
2024-11-02 04:54
Reported
2024-11-02 04:54
Platform
win10v2004-20241007-en
Max time kernel
8s
Max time network
8s
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 |
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\Pearjumper.exe | N/A |
| Token: SeDebugPrivilege | 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 3952 wrote to memory of 1972 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3952 wrote to memory of 1972 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3952 wrote to memory of 4432 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3952 wrote to memory of 4432 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4432 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4432 wrote to memory of 3100 | 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\Pearjumper.exe
"C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /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 "Quasar Client Startup" /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 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.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 |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp |
Files
memory/3952-0-0x00007FFD99B73000-0x00007FFD99B75000-memory.dmp
memory/3952-1-0x0000000000250000-0x0000000000574000-memory.dmp
memory/3952-2-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 5dd91af5b6d1e8f38ccf83f6cf24e93d |
| SHA1 | 978d27dfe11619fbd71333d63741da0b3a21b7d2 |
| SHA256 | e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff |
| SHA512 | 6b6e61f8419e234eeb233eeb0f402434f5905492831588a3a488caf02ca9a60bc21a4b94acf7982d3dc533afe801341220a51d1fb33bc14dcc1cca1c44f8c03b |
memory/3952-10-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp
memory/4432-9-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp
memory/4432-11-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp
memory/4432-12-0x0000000002F10000-0x0000000002F60000-memory.dmp
memory/4432-13-0x000000001C1F0000-0x000000001C2A2000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-02 04:54
Reported
2024-11-02 04:57
Platform
win7-20240903-en
Max time kernel
149s
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 |
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\Pearjumper.exe | N/A |
| Token: SeDebugPrivilege | 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\Pearjumper.exe
"C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /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 "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp | |
| N/A | 192.168.4.26:4782 | tcp |
Files
memory/2936-0-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp
memory/2936-1-0x0000000000150000-0x0000000000474000-memory.dmp
memory/2936-2-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 5dd91af5b6d1e8f38ccf83f6cf24e93d |
| SHA1 | 978d27dfe11619fbd71333d63741da0b3a21b7d2 |
| SHA256 | e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff |
| SHA512 | 6b6e61f8419e234eeb233eeb0f402434f5905492831588a3a488caf02ca9a60bc21a4b94acf7982d3dc533afe801341220a51d1fb33bc14dcc1cca1c44f8c03b |
memory/2804-8-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp
memory/2936-10-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp
memory/2804-9-0x0000000000DF0000-0x0000000001114000-memory.dmp
memory/2804-11-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp
memory/2804-12-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp