Analysis Overview
SHA256
fc6402f6df918d0307ea6e033afebf90fde69ca6b74dc6af4d97423d00518c45
Threat Level: Known bad
The file Shut.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar family
Quasar RAT
Executes dropped EXE
Looks up external IP address via web service
Drops file in System32 directory
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of FindShellTrayWindow
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-12-28 23:02
Signatures
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2022-12-28 23:02
Reported
2022-12-28 23:04
Platform
win7-20220812-en
Max time kernel
144s
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 |
| 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\D3SD\explorer.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system32\D3SD\explorer.exe | C:\Windows\system32\D3SD\explorer.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD | C:\Windows\system32\D3SD\explorer.exe | N/A |
| File created | C:\Windows\system32\D3SD\explorer.exe | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD\explorer.exe | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
Enumerates physical storage devices
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\Shut.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Shut.exe
"C:\Users\Admin\AppData\Local\Temp\Shut.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Shut.exe" /rl HIGHEST /f
C:\Windows\system32\D3SD\explorer.exe
"C:\Windows\system32\D3SD\explorer.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\D3SD\explorer.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 193.149.176.156:8080 | tcp |
Files
memory/1944-54-0x0000000000250000-0x00000000002D4000-memory.dmp
memory/1944-55-0x000007FEFC511000-0x000007FEFC513000-memory.dmp
memory/1676-56-0x0000000000000000-mapping.dmp
memory/1720-57-0x0000000000000000-mapping.dmp
C:\Windows\system32\D3SD\explorer.exe
| MD5 | 225bee869cfc364982f132a8b9320f1e |
| SHA1 | 3d13fdd4c3781a3fe0b279f5480b88150cdc1ada |
| SHA256 | fc6402f6df918d0307ea6e033afebf90fde69ca6b74dc6af4d97423d00518c45 |
| SHA512 | e17a17f41d57dbf28fa775926e2085e19b5583c5399b2e5d36466c0d4ee70bf2eb3d3c2ae079995bcf1eee5e9c3aaa0c84fbf462dd0d8c6e5591ae2a1210a871 |
C:\Windows\System32\D3SD\explorer.exe
| MD5 | 225bee869cfc364982f132a8b9320f1e |
| SHA1 | 3d13fdd4c3781a3fe0b279f5480b88150cdc1ada |
| SHA256 | fc6402f6df918d0307ea6e033afebf90fde69ca6b74dc6af4d97423d00518c45 |
| SHA512 | e17a17f41d57dbf28fa775926e2085e19b5583c5399b2e5d36466c0d4ee70bf2eb3d3c2ae079995bcf1eee5e9c3aaa0c84fbf462dd0d8c6e5591ae2a1210a871 |
memory/1720-60-0x00000000009F0000-0x0000000000A74000-memory.dmp
memory/944-62-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-12-28 23:02
Reported
2022-12-28 23:04
Platform
win10v2004-20220812-en
Max time kernel
149s
Max time network
152s
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\D3SD\explorer.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.ipify.org | N/A | N/A |
| N/A | api.ipify.org | N/A | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system32\D3SD | C:\Windows\system32\D3SD\explorer.exe | N/A |
| File created | C:\Windows\system32\D3SD\explorer.exe | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD\explorer.exe | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD | C:\Users\Admin\AppData\Local\Temp\Shut.exe | N/A |
| File opened for modification | C:\Windows\system32\D3SD\explorer.exe | C:\Windows\system32\D3SD\explorer.exe | N/A |
Enumerates physical storage devices
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\Shut.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\D3SD\explorer.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1524 wrote to memory of 1992 | N/A | C:\Users\Admin\AppData\Local\Temp\Shut.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1524 wrote to memory of 1992 | N/A | C:\Users\Admin\AppData\Local\Temp\Shut.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1524 wrote to memory of 4124 | N/A | C:\Users\Admin\AppData\Local\Temp\Shut.exe | C:\Windows\system32\D3SD\explorer.exe |
| PID 1524 wrote to memory of 4124 | N/A | C:\Users\Admin\AppData\Local\Temp\Shut.exe | C:\Windows\system32\D3SD\explorer.exe |
| PID 4124 wrote to memory of 4948 | N/A | C:\Windows\system32\D3SD\explorer.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 4124 wrote to memory of 4948 | N/A | C:\Windows\system32\D3SD\explorer.exe | C:\Windows\SYSTEM32\schtasks.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Shut.exe
"C:\Users\Admin\AppData\Local\Temp\Shut.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Shut.exe" /rl HIGHEST /f
C:\Windows\system32\D3SD\explorer.exe
"C:\Windows\system32\D3SD\explorer.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Windows\system32\D3SD\explorer.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 20.123.104.105:443 | tcp | |
| N/A | 193.149.176.156:8080 | tcp | |
| N/A | 8.8.8.8:53 | tools.keycdn.com | udp |
| N/A | 185.172.148.96:443 | tools.keycdn.com | tcp |
| N/A | 8.8.8.8:53 | api.ipify.org | udp |
| N/A | 64.185.227.156:443 | api.ipify.org | tcp |
| N/A | 93.184.220.29:80 | tcp | |
| N/A | 93.184.220.29:80 | tcp | |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 93.184.220.29:80 | tcp |
Files
memory/1524-132-0x0000000000580000-0x0000000000604000-memory.dmp
memory/1524-133-0x00007FFF257C0000-0x00007FFF26281000-memory.dmp
memory/1992-134-0x0000000000000000-mapping.dmp
memory/4124-135-0x0000000000000000-mapping.dmp
C:\Windows\System32\D3SD\explorer.exe
| MD5 | 225bee869cfc364982f132a8b9320f1e |
| SHA1 | 3d13fdd4c3781a3fe0b279f5480b88150cdc1ada |
| SHA256 | fc6402f6df918d0307ea6e033afebf90fde69ca6b74dc6af4d97423d00518c45 |
| SHA512 | e17a17f41d57dbf28fa775926e2085e19b5583c5399b2e5d36466c0d4ee70bf2eb3d3c2ae079995bcf1eee5e9c3aaa0c84fbf462dd0d8c6e5591ae2a1210a871 |
C:\Windows\system32\D3SD\explorer.exe
| MD5 | 225bee869cfc364982f132a8b9320f1e |
| SHA1 | 3d13fdd4c3781a3fe0b279f5480b88150cdc1ada |
| SHA256 | fc6402f6df918d0307ea6e033afebf90fde69ca6b74dc6af4d97423d00518c45 |
| SHA512 | e17a17f41d57dbf28fa775926e2085e19b5583c5399b2e5d36466c0d4ee70bf2eb3d3c2ae079995bcf1eee5e9c3aaa0c84fbf462dd0d8c6e5591ae2a1210a871 |
memory/1524-138-0x00007FFF257C0000-0x00007FFF26281000-memory.dmp
memory/4124-139-0x00007FFF257C0000-0x00007FFF26281000-memory.dmp
memory/4948-140-0x0000000000000000-mapping.dmp
memory/4124-141-0x000000001C840000-0x000000001C890000-memory.dmp
memory/4124-142-0x000000001C950000-0x000000001CA02000-memory.dmp
memory/4124-143-0x00007FFF257C0000-0x00007FFF26281000-memory.dmp