Analysis Overview
SHA256
43315abb9c8be9a39782bd8694a7ea9f16a867500dc804454d04b8bf2c15c51e
Threat Level: Known bad
The file Quasar.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-03-30 17:38
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
2024-03-30 17:38
Reported
2024-03-30 17:41
Platform
win7-20240221-en
Max time kernel
126s
Max time network
121s
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 |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Quasar.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2848 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\Quasar.exe | C:\Windows\system32\WerFault.exe |
| PID 2848 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\Quasar.exe | C:\Windows\system32\WerFault.exe |
| PID 2848 wrote to memory of 3016 | N/A | C:\Users\Admin\AppData\Local\Temp\Quasar.exe | C:\Windows\system32\WerFault.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Quasar.exe
"C:\Users\Admin\AppData\Local\Temp\Quasar.exe"
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2848 -s 588
Network
Files
memory/2848-0-0x0000000000CD0000-0x0000000000E08000-memory.dmp
memory/2848-1-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp
memory/2848-2-0x000000001B400000-0x000000001B480000-memory.dmp
memory/2848-3-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp
memory/2848-4-0x000000001B400000-0x000000001B480000-memory.dmp
memory/2848-5-0x000007FEF5D30000-0x000007FEF671C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-30 17:38
Reported
2024-03-30 17:41
Platform
win10v2004-20240226-en
Max time kernel
113s
Max time network
122s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Quasar.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\Quasar.exe
"C:\Users\Admin\AppData\Local\Temp\Quasar.exe"
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=4168 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 6.181.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| GB | 142.250.187.234:443 | tcp | |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
Files
memory/1824-0-0x000001F6F41A0000-0x000001F6F42D8000-memory.dmp
memory/1824-1-0x00007FF970E00000-0x00007FF9718C1000-memory.dmp
memory/1824-2-0x000001F6F6200000-0x000001F6F6210000-memory.dmp
memory/1824-3-0x00007FF970E00000-0x00007FF9718C1000-memory.dmp