Analysis Overview
SHA256
0d9c35b3d2445b75ac03e8262eaf8e3d33bbff847117c258e7e9004a939f98ac
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Drops file in System32 directory
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Checks SCSI registry key(s)
Checks processor information in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-03-25 15:24
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
2024-03-25 15:24
Reported
2024-03-25 15:26
Platform
win7-20240221-en
Max time kernel
117s
Max time network
118s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\Boot\winreset.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.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 |
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
Network
Files
memory/2180-0-0x0000000000CB0000-0x0000000000FD4000-memory.dmp
memory/2180-1-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
memory/2180-2-0x000000001B320000-0x000000001B3A0000-memory.dmp
memory/2180-3-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp
memory/2180-4-0x000000001B320000-0x000000001B3A0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-25 15:24
Reported
2024-03-25 15:26
Platform
win10v2004-20240319-en
Max time kernel
147s
Max time network
152s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\Boot\winreset.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File created | C:\Windows\system32\Boot\winreset.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File created | C:\Windows\system32\Boot\winreset.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File created | C:\Windows\system32\Boot\winreset.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_QEMU&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\system32\taskmgr.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000_Classes\Local Settings | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: EnumeratesProcesses
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:\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 |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| Token: 33 | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --default-search-provider=? --out-pipe-name=MSEdgeDefaultcd9217beh1344h4751h849dhf348d767624d
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4616 --field-trial-handle=2320,i,3025503729105798828,9325691672526736153,262144 --variations-seed-version /prefetch:8
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --default-search-provider=? --out-pipe-name=MSEdgeDefault8a740bfch255bh4dechaff0h9b264fbe36db
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --default-search-provider=? --out-pipe-name=MSEdgeDefaultccdb9ef6hd6cah43ech8386hd8bffeaf9c70
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | cxcs.microsoft.net | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| GB | 2.20.37.224:443 | cxcs.microsoft.net | tcp |
| GB | 92.123.128.181:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 224.37.20.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 181.128.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 203.33.253.131.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 13.107.246.64:443 | tcp | |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | cxcs.microsoft.net | udp |
| GB | 92.123.128.168:443 | www.bing.com | tcp |
| GB | 2.20.37.224:443 | cxcs.microsoft.net | tcp |
| US | 8.8.8.8:53 | 168.128.123.92.in-addr.arpa | udp |
| GB | 2.20.37.224:443 | cxcs.microsoft.net | tcp |
| US | 8.8.8.8:53 | 182.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 186.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 121.150.79.40.in-addr.arpa | udp |
Files
memory/1788-0-0x0000000000590000-0x00000000008B4000-memory.dmp
memory/1788-1-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/1788-2-0x00000000011E0000-0x00000000011F0000-memory.dmp
memory/5028-3-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-4-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-5-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-9-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-10-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-12-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-11-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-13-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-15-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/5028-14-0x0000022A0C630000-0x0000022A0C631000-memory.dmp
memory/1788-16-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/1788-17-0x00000000011E0000-0x00000000011F0000-memory.dmp
memory/2440-18-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/2440-19-0x000000001C050000-0x000000001C060000-memory.dmp
memory/2440-20-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/2440-22-0x000000001C050000-0x000000001C060000-memory.dmp
memory/3124-23-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/5408-24-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/3124-25-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/3124-26-0x000000001B170000-0x000000001B180000-memory.dmp
memory/5408-27-0x00007FF9B60C0000-0x00007FF9B6B81000-memory.dmp
memory/5408-28-0x000000001BC50000-0x000000001BC60000-memory.dmp