Analysis Overview
SHA256
19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55
Threat Level: Known bad
The file Windows Remote Access Trojan.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Unsigned PE
Creates scheduled task(s)
Uses Task Scheduler COM API
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-20 17:57
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
2024-04-20 17:57
Reported
2024-04-20 18:00
Platform
win7-20240221-en
Max time kernel
126s
Max time network
137s
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:\Users\Admin\AppData\Roaming\SubDir\Client.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 |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | N/A |
| Token: SeDebugPrivilege | 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\Windows Remote Access Trojan.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /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 Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp |
Files
memory/2192-0-0x0000000000CC0000-0x0000000000FE4000-memory.dmp
memory/2192-1-0x000007FEF5950000-0x000007FEF633C000-memory.dmp
memory/2192-2-0x000000001B340000-0x000000001B3C0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 2c2172ccafa055a00312e4e3a08f229a |
| SHA1 | 1c9dd30693318258d8ffd70984cb348d755c5d97 |
| SHA256 | 19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55 |
| SHA512 | ceecdee4cdb348a59f7b918b7c1d641e6ac398601493d87e1c91128387664effb457256cec427f71686cda808418003c8dc01ae9b22cb6ce76338237e5213225 |
memory/1996-9-0x000007FEF5950000-0x000007FEF633C000-memory.dmp
memory/1996-8-0x0000000000E00000-0x0000000001124000-memory.dmp
memory/2192-11-0x000007FEF5950000-0x000007FEF633C000-memory.dmp
memory/1996-10-0x000000001B290000-0x000000001B310000-memory.dmp
memory/1996-12-0x000007FEF5950000-0x000007FEF633C000-memory.dmp
memory/1996-13-0x000000001B290000-0x000000001B310000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-20 17:57
Reported
2024-04-20 18:00
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
155s
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 |
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 |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | N/A |
| Token: SeDebugPrivilege | 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
| Description | Indicator | Process | Target |
| PID 4300 wrote to memory of 2940 | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4300 wrote to memory of 2940 | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4300 wrote to memory of 1136 | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4300 wrote to memory of 1136 | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1136 wrote to memory of 3004 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1136 wrote to memory of 3004 | 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\Windows Remote Access Trojan.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Remote Access Trojan.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /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 Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
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=3784 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| GB | 216.58.201.106:443 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 192.168.1.154:4782 | tcp | |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| N/A | 192.168.1.154:4782 | tcp | |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| N/A | 192.168.1.154:4782 | tcp | |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp | |
| N/A | 192.168.1.154:4782 | tcp |
Files
memory/4300-0-0x00000000001C0000-0x00000000004E4000-memory.dmp
memory/4300-1-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp
memory/4300-2-0x000000001B3A0000-0x000000001B3B0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 2c2172ccafa055a00312e4e3a08f229a |
| SHA1 | 1c9dd30693318258d8ffd70984cb348d755c5d97 |
| SHA256 | 19b707de920bf77466108ba32a3d4b01fe051f46173db4bbf65c9e17895d9f55 |
| SHA512 | ceecdee4cdb348a59f7b918b7c1d641e6ac398601493d87e1c91128387664effb457256cec427f71686cda808418003c8dc01ae9b22cb6ce76338237e5213225 |
memory/1136-9-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp
memory/1136-10-0x000000001B760000-0x000000001B770000-memory.dmp
memory/4300-11-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp
memory/1136-12-0x0000000002C60000-0x0000000002CB0000-memory.dmp
memory/1136-13-0x000000001BF20000-0x000000001BFD2000-memory.dmp
memory/1136-14-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp
memory/1136-15-0x000000001B760000-0x000000001B770000-memory.dmp