Analysis Overview
SHA256
36c5e613a6f16466cfbea6b74f926cb9d357bf78e1e229d9f47f38e7b78a7291
Threat Level: Known bad
The file B658C5D7ED9CD9D40992885120E78450.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Unsigned PE
Uses Task Scheduler COM API
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-02 17:06
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-02 17:06
Reported
2024-11-02 17:08
Platform
win7-20240903-en
Max time kernel
149s
Max time network
153s
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\Local\Temp\Client-built.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.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\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 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\B658C5D7ED9CD9D40992885120E78450.exe
"C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.exe"
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 "puttystart" /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 "puttystart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp | |
| PL | 83.168.110.87:4782 | tcp |
Files
memory/2856-0-0x0000000073EAE000-0x0000000073EAF000-memory.dmp
memory/2856-1-0x00000000000D0000-0x0000000000420000-memory.dmp
memory/2856-2-0x0000000073EA0000-0x000000007458E000-memory.dmp
\Users\Admin\AppData\Local\Temp\Client-built.exe
| MD5 | e456f2449b504e6af29acb9c1e0ebd25 |
| SHA1 | 4680b936eca2d5a88cbeed164b54a0b12f138892 |
| SHA256 | 7ce80a4a4932516cf8163f73c85537e621b0a1e1a0c0fda41da1f71b1867dfc6 |
| SHA512 | ffe8788bae2143eb5b68f57edb3ded569bc1e75390bc48a7eb92e65a95688d34229039001d80f717f1c14e650fe94c01ec6e9438dac045af17569dc6811ab281 |
memory/2856-9-0x0000000073EA0000-0x000000007458E000-memory.dmp
memory/2680-10-0x000007FEF4E53000-0x000007FEF4E54000-memory.dmp
memory/2680-11-0x0000000000DE0000-0x0000000001104000-memory.dmp
memory/2680-12-0x000007FEF4E50000-0x000007FEF583C000-memory.dmp
memory/2680-19-0x000007FEF4E50000-0x000007FEF583C000-memory.dmp
memory/2668-18-0x0000000000850000-0x0000000000B74000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-02 17:06
Reported
2024-11-02 17:08
Platform
win10v2004-20241007-en
Max time kernel
147s
Max time network
152s
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 |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.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\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 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\B658C5D7ED9CD9D40992885120E78450.exe
"C:\Users\Admin\AppData\Local\Temp\B658C5D7ED9CD9D40992885120E78450.exe"
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 "puttystart" /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 "puttystart" /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 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 136.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| PL | 83.168.110.87:4782 | tcp | |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 87.110.168.83.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 212.20.149.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 101.11.19.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.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 | 55.36.223.20.in-addr.arpa | udp |
Files
memory/3596-0-0x00000000749CE000-0x00000000749CF000-memory.dmp
memory/3596-1-0x0000000000C80000-0x0000000000FD0000-memory.dmp
memory/3596-3-0x00000000749C0000-0x0000000075170000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
| MD5 | e456f2449b504e6af29acb9c1e0ebd25 |
| SHA1 | 4680b936eca2d5a88cbeed164b54a0b12f138892 |
| SHA256 | 7ce80a4a4932516cf8163f73c85537e621b0a1e1a0c0fda41da1f71b1867dfc6 |
| SHA512 | ffe8788bae2143eb5b68f57edb3ded569bc1e75390bc48a7eb92e65a95688d34229039001d80f717f1c14e650fe94c01ec6e9438dac045af17569dc6811ab281 |
memory/2836-14-0x00007FF988C13000-0x00007FF988C15000-memory.dmp
memory/2836-16-0x00000000003B0000-0x00000000006D4000-memory.dmp
memory/3596-17-0x00000000749C0000-0x0000000075170000-memory.dmp
memory/2836-18-0x00007FF988C10000-0x00007FF9896D1000-memory.dmp
memory/2836-25-0x00007FF988C10000-0x00007FF9896D1000-memory.dmp
memory/1828-26-0x000000001C870000-0x000000001C8C0000-memory.dmp
memory/1828-27-0x000000001C980000-0x000000001CA32000-memory.dmp
memory/1828-30-0x000000001C900000-0x000000001C912000-memory.dmp
memory/1828-31-0x000000001D480000-0x000000001D4BC000-memory.dmp