Analysis Overview
SHA256
e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff
Threat Level: Known bad
The file Pearjumper.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Unsigned PE
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-02 04:38
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
2024-11-02 04:38
Reported
2024-11-02 04:39
Platform
win7-20241010-en
Max time kernel
14s
Max time network
19s
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 |
Files
memory/2344-0-0x000007FEF5A93000-0x000007FEF5A94000-memory.dmp
memory/2344-1-0x00000000000E0000-0x0000000000404000-memory.dmp
memory/2344-2-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 5dd91af5b6d1e8f38ccf83f6cf24e93d |
| SHA1 | 978d27dfe11619fbd71333d63741da0b3a21b7d2 |
| SHA256 | e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff |
| SHA512 | 6b6e61f8419e234eeb233eeb0f402434f5905492831588a3a488caf02ca9a60bc21a4b94acf7982d3dc533afe801341220a51d1fb33bc14dcc1cca1c44f8c03b |
memory/1260-9-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp
memory/2344-8-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp
memory/1260-10-0x0000000000890000-0x0000000000BB4000-memory.dmp
memory/1260-11-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp
memory/1260-12-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-02 04:38
Reported
2024-11-02 04:41
Platform
win10v2004-20241007-en
Max time kernel
137s
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 |
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 3676 wrote to memory of 3024 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3676 wrote to memory of 3024 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3676 wrote to memory of 2360 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3676 wrote to memory of 2360 | N/A | C:\Users\Admin\AppData\Local\Temp\Pearjumper.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 2360 wrote to memory of 2704 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2360 wrote to memory of 2704 | 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 | g.bing.com | udp |
| US | 150.171.27.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.27.171.150.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp | |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp | |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.42.69.40.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp | |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp | |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| N/A | 192.168.4.26:4782 | tcp |
Files
memory/3676-0-0x00007FFB40EF3000-0x00007FFB40EF5000-memory.dmp
memory/3676-1-0x0000000000D50000-0x0000000001074000-memory.dmp
memory/3676-2-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 5dd91af5b6d1e8f38ccf83f6cf24e93d |
| SHA1 | 978d27dfe11619fbd71333d63741da0b3a21b7d2 |
| SHA256 | e2ba71624ae6ac3f80fbb474079bda5827244925eff77919760367d1622607ff |
| SHA512 | 6b6e61f8419e234eeb233eeb0f402434f5905492831588a3a488caf02ca9a60bc21a4b94acf7982d3dc533afe801341220a51d1fb33bc14dcc1cca1c44f8c03b |
memory/2360-10-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp
memory/3676-9-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp
memory/2360-11-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp
memory/2360-12-0x000000001B3B0000-0x000000001B400000-memory.dmp
memory/2360-13-0x000000001BD40000-0x000000001BDF2000-memory.dmp
memory/2360-14-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp