Analysis Overview
SHA256
a3773025a4ff7ba7e2ea475c8e5b2c74bd60f963ad9e27ae7ca0123fbb235976
Threat Level: Known bad
The file solar.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Executes dropped EXE
Unsigned PE
Suspicious behavior: GetForegroundWindowSpam
Uses Task Scheduler COM API
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Checks SCSI registry key(s)
Suspicious use of SendNotifyMessage
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-25 11:20
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
2024-05-25 11:20
Reported
2024-05-25 11:24
Platform
win10v2004-20240426-en
Max time kernel
149s
Max time network
151s
Command Line
Signatures
Quasar RAT
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 |
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Creates scheduled task(s)
| 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 |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000_Classes\Local Settings | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\solar.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
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 4040 wrote to memory of 1528 | N/A | C:\Users\Admin\AppData\Local\Temp\solar.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4040 wrote to memory of 1528 | N/A | C:\Users\Admin\AppData\Local\Temp\solar.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4040 wrote to memory of 3340 | N/A | C:\Users\Admin\AppData\Local\Temp\solar.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4040 wrote to memory of 3340 | N/A | C:\Users\Admin\AppData\Local\Temp\solar.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3340 wrote to memory of 3252 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3340 wrote to memory of 3252 | 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\solar.exe
"C:\Users\Admin\AppData\Local\Temp\solar.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar" /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" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /7
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | cr7stakewin-27924.portmap.host | udp |
| DE | 193.161.193.99:27924 | cr7stakewin-27924.portmap.host | tcp |
| US | 8.8.8.8:53 | 194.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| NL | 23.62.61.194:443 | www.bing.com | 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 | 99.193.161.193.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 138.136.73.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
Files
memory/4040-0-0x00007FFB06F83000-0x00007FFB06F85000-memory.dmp
memory/4040-1-0x0000000000F10000-0x0000000001234000-memory.dmp
memory/4040-2-0x00007FFB06F80000-0x00007FFB07A41000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | ca558fea52e3ca7a1b61e0f69ac268b2 |
| SHA1 | 2445d78506e19c17c99eca0744719c409c1e2c04 |
| SHA256 | a3773025a4ff7ba7e2ea475c8e5b2c74bd60f963ad9e27ae7ca0123fbb235976 |
| SHA512 | 7d3e5cab72a6e7da4d2cc7fca940d58d0c0c82e1a3ee5dfce38317eb6eb6446bac82ed66bfc96c84e1c7917f1a00c1635640daa42ce09fa3ab27c5f213d73396 |
memory/4040-9-0x00007FFB06F80000-0x00007FFB07A41000-memory.dmp
memory/3340-10-0x00007FFB06F80000-0x00007FFB07A41000-memory.dmp
memory/3340-11-0x00007FFB06F80000-0x00007FFB07A41000-memory.dmp
memory/3340-12-0x000000001C0B0000-0x000000001C100000-memory.dmp
memory/3340-13-0x000000001C1C0000-0x000000001C272000-memory.dmp
memory/3340-16-0x000000001C150000-0x000000001C162000-memory.dmp
memory/3340-17-0x000000001C8C0000-0x000000001C8FC000-memory.dmp
memory/3340-18-0x000000001D130000-0x000000001D658000-memory.dmp
memory/3456-19-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-20-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-21-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-31-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-30-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-29-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-28-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-27-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-26-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3456-25-0x000001F80F740000-0x000001F80F741000-memory.dmp
memory/3340-33-0x00007FFB06F80000-0x00007FFB07A41000-memory.dmp