Analysis Overview
SHA256
04b8bb3fc2b3311f5027fa536ec480a3211cbc4673efde460f59daf44a7a1f55
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Looks up external IP address via web service
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-12 18:55
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
2024-04-12 18:55
Reported
2024-04-12 18:55
Platform
win10-20240404-en
Max time kernel
23s
Max time network
19s
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\SubClient.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip-api.com | N/A | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.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 |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
"C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | ip-api.com | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 8.8.8.8:53 | 1.112.95.208.in-addr.arpa | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 8.8.8.8:53 | Lunasplanet-29399.portmap.host | udp |
| DE | 193.161.193.99:29399 | Lunasplanet-29399.portmap.host | tcp |
| US | 8.8.8.8:53 | 99.193.161.193.in-addr.arpa | udp |
Files
memory/1844-1-0x0000000073940000-0x000000007402E000-memory.dmp
memory/1844-0-0x0000000000A50000-0x0000000000AAE000-memory.dmp
memory/1844-2-0x0000000005850000-0x0000000005D4E000-memory.dmp
memory/1844-3-0x00000000053F0000-0x0000000005482000-memory.dmp
memory/1844-4-0x00000000052D0000-0x00000000052E0000-memory.dmp
memory/1844-5-0x0000000005490000-0x00000000054F6000-memory.dmp
memory/1844-6-0x0000000005F90000-0x0000000005FA2000-memory.dmp
memory/1844-7-0x0000000006380000-0x00000000063BE000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
| MD5 | 46c2a971cec1f82ea7a338ab4a368f37 |
| SHA1 | 69b181896b53a27554a6535f61e1b1e785750f98 |
| SHA256 | 04b8bb3fc2b3311f5027fa536ec480a3211cbc4673efde460f59daf44a7a1f55 |
| SHA512 | 627ea3b4f030dc62fa13b8902dbc6d6e286e8ba93b08ae584f37d8dcc9933dfbe84dd27241510dd821bd58bb8f8621399cb85c4e35b35d7424c1e7be141fd80f |
memory/1844-14-0x0000000073940000-0x000000007402E000-memory.dmp
memory/1644-15-0x0000000073940000-0x000000007402E000-memory.dmp
memory/1644-16-0x0000000005530000-0x0000000005540000-memory.dmp
memory/1644-18-0x0000000006A60000-0x0000000006A6A000-memory.dmp
memory/1644-19-0x0000000073940000-0x000000007402E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-12 18:55
Reported
2024-04-12 18:58
Platform
win10v2004-20240412-en
Max time kernel
149s
Max time network
150s
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\SubClient.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip-api.com | N/A | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.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 |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
"C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ip-api.com | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 1.112.95.208.in-addr.arpa | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 8.8.8.8:53 | Lunasplanet-29399.portmap.host | udp |
| DE | 193.161.193.99:29399 | Lunasplanet-29399.portmap.host | tcp |
| US | 8.8.8.8:53 | 99.193.161.193.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.56.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
Files
memory/212-0-0x00000000748E0000-0x0000000075090000-memory.dmp
memory/212-1-0x0000000000AB0000-0x0000000000B0E000-memory.dmp
memory/212-2-0x0000000005BD0000-0x0000000006174000-memory.dmp
memory/212-3-0x0000000005560000-0x00000000055F2000-memory.dmp
memory/212-4-0x00000000054B0000-0x00000000054C0000-memory.dmp
memory/212-5-0x0000000005620000-0x0000000005686000-memory.dmp
memory/212-6-0x0000000005B70000-0x0000000005B82000-memory.dmp
memory/212-7-0x0000000006760000-0x000000000679C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
| MD5 | 46c2a971cec1f82ea7a338ab4a368f37 |
| SHA1 | 69b181896b53a27554a6535f61e1b1e785750f98 |
| SHA256 | 04b8bb3fc2b3311f5027fa536ec480a3211cbc4673efde460f59daf44a7a1f55 |
| SHA512 | 627ea3b4f030dc62fa13b8902dbc6d6e286e8ba93b08ae584f37d8dcc9933dfbe84dd27241510dd821bd58bb8f8621399cb85c4e35b35d7424c1e7be141fd80f |
memory/212-15-0x00000000748E0000-0x0000000075090000-memory.dmp
memory/2300-14-0x00000000748E0000-0x0000000075090000-memory.dmp
memory/2300-16-0x0000000005220000-0x0000000005230000-memory.dmp
memory/2300-18-0x00000000068C0000-0x00000000068CA000-memory.dmp
memory/2300-19-0x00000000748E0000-0x0000000075090000-memory.dmp
memory/2300-20-0x0000000005220000-0x0000000005230000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2024-04-12 18:55
Reported
2024-04-12 18:58
Platform
win11-20240412-en
Max time kernel
90s
Max time network
150s
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\SubClient.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip-api.com | N/A | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.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 |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
"C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe"
C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "SubClient.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | ip-api.com | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| DE | 193.161.193.99:29399 | Lunasplanet-29399.portmap.host | tcp |
Files
memory/4648-0-0x0000000000A90000-0x0000000000AEE000-memory.dmp
memory/4648-1-0x0000000074480000-0x0000000074C31000-memory.dmp
memory/4648-2-0x0000000005BB0000-0x0000000006156000-memory.dmp
memory/4648-3-0x0000000005600000-0x0000000005692000-memory.dmp
memory/4648-4-0x0000000005730000-0x0000000005740000-memory.dmp
memory/4648-5-0x00000000056A0000-0x0000000005706000-memory.dmp
memory/4648-6-0x0000000005B20000-0x0000000005B32000-memory.dmp
memory/4648-7-0x0000000006830000-0x000000000686C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\SubClient.exe
| MD5 | 46c2a971cec1f82ea7a338ab4a368f37 |
| SHA1 | 69b181896b53a27554a6535f61e1b1e785750f98 |
| SHA256 | 04b8bb3fc2b3311f5027fa536ec480a3211cbc4673efde460f59daf44a7a1f55 |
| SHA512 | 627ea3b4f030dc62fa13b8902dbc6d6e286e8ba93b08ae584f37d8dcc9933dfbe84dd27241510dd821bd58bb8f8621399cb85c4e35b35d7424c1e7be141fd80f |
memory/2584-14-0x0000000074480000-0x0000000074C31000-memory.dmp
memory/2584-16-0x00000000050A0000-0x00000000050B0000-memory.dmp
memory/4648-15-0x0000000074480000-0x0000000074C31000-memory.dmp
memory/2584-18-0x0000000006700000-0x000000000670A000-memory.dmp
memory/2584-19-0x0000000074480000-0x0000000074C31000-memory.dmp