Analysis Overview
SHA256
9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2
Threat Level: Known bad
The file ratXD.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Drops file in System32 directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-18 10:42
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
2024-04-18 10:42
Reported
2024-04-18 10:45
Platform
win7-20240221-en
Max time kernel
128s
Max time network
141s
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 |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
| File opened for modification | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2172 wrote to memory of 2080 | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | C:\Windows\system32\SubDir\Client.exe |
| PID 2172 wrote to memory of 2080 | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | C:\Windows\system32\SubDir\Client.exe |
| PID 2172 wrote to memory of 2080 | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | C:\Windows\system32\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\ratXD.exe
"C:\Users\Admin\AppData\Local\Temp\ratXD.exe"
C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\SubDir\Client.exe"
Network
| Country | Destination | Domain | Proto |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp |
Files
memory/2172-0-0x00000000012F0000-0x0000000001614000-memory.dmp
memory/2172-1-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp
memory/2172-2-0x000000001B4A0000-0x000000001B520000-memory.dmp
memory/2172-7-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp
memory/2080-9-0x0000000001300000-0x0000000001624000-memory.dmp
memory/2080-10-0x000000001B370000-0x000000001B3F0000-memory.dmp
memory/2080-8-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp
C:\Windows\system32\SubDir\Client.exe
| MD5 | 04111705ab65d5bc16adf4eeab90011c |
| SHA1 | 97442c8671032c8e6bdf1bb086c4557efe40cb9e |
| SHA256 | 6705d825bcee1ee4f759c0d8908042516c5871a7dffa00d9adcba15f991e5162 |
| SHA512 | eddcab5dcc76831dc55438c2748d4caf2baba711b3042f7c9e27ff49015cd04bd805ff7f1f4c598b90de4ec2796eff2649dc949cdbe491bea40f3f0d8a1d6c1b |
memory/2080-11-0x000007FEF5060000-0x000007FEF5A4C000-memory.dmp
memory/2080-12-0x000000001B370000-0x000000001B3F0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-18 10:42
Reported
2024-04-18 10:45
Platform
win10v2004-20240226-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:\Windows\system32\SubDir\Client.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
| File opened for modification | C:\Windows\system32\SubDir\Client.exe | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2160 wrote to memory of 4688 | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | C:\Windows\system32\SubDir\Client.exe |
| PID 2160 wrote to memory of 4688 | N/A | C:\Users\Admin\AppData\Local\Temp\ratXD.exe | C:\Windows\system32\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\ratXD.exe
"C:\Users\Admin\AppData\Local\Temp\ratXD.exe"
C:\Windows\system32\SubDir\Client.exe
"C:\Windows\system32\SubDir\Client.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=3532 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| BR | 177.72.82.9:5678 | tcp | |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| BR | 177.72.82.9:5678 | tcp | |
| US | 13.107.253.64:443 | tcp | |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| GB | 172.217.169.74:443 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| BR | 177.72.82.9:5678 | tcp | |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| BR | 177.72.82.9:5678 | tcp | |
| US | 8.8.8.8:53 | 9.82.72.177.in-addr.arpa | udp |
| BR | 177.72.82.9:5678 | tcp | |
| BR | 177.72.82.9:5678 | tcp | |
| US | 8.8.8.8:53 | 26.173.189.20.in-addr.arpa | udp |
Files
memory/2160-0-0x0000000000850000-0x0000000000B74000-memory.dmp
memory/2160-1-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp
memory/2160-2-0x000000001B770000-0x000000001B780000-memory.dmp
C:\Windows\system32\SubDir\Client.exe
| MD5 | 9c5f2f586e52a975593d11710685f846 |
| SHA1 | 887006a6849b22cfbf85871e50ab33404097f654 |
| SHA256 | 9259a4e7b71dc408f62faa9c6f7f73b5a906466dc9c751bfa8b23f641cc614f2 |
| SHA512 | c3fb61664de1248713b7c1a98d17b344a68d6a676841f174659565e043ec6aecc0c27bd4a47d815e0d19fd070054ff2ca57fb304878b284162a5b9142c2b38bf |
memory/4688-9-0x00000000025A0000-0x00000000025B0000-memory.dmp
memory/4688-8-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp
memory/4688-10-0x000000001BBC0000-0x000000001BC10000-memory.dmp
memory/4688-11-0x000000001BCD0000-0x000000001BD82000-memory.dmp
memory/2160-12-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp
memory/4688-13-0x00007FFC3DC90000-0x00007FFC3E751000-memory.dmp
memory/4688-14-0x00000000025A0000-0x00000000025B0000-memory.dmp