Analysis Overview
SHA256
b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca
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
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-10-25 07:39
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
2024-10-25 07:39
Reported
2024-10-25 07:45
Platform
win10v2004-20241007-en
Max time kernel
298s
Max time network
300s
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 |
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\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1356 wrote to memory of 3728 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1356 wrote to memory of 3728 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.190.18.2.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.28.171.150.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp |
Files
memory/1356-0-0x00007FFEB3CD3000-0x00007FFEB3CD5000-memory.dmp
memory/1356-1-0x0000000000770000-0x0000000000A94000-memory.dmp
memory/1356-2-0x00007FFEB3CD0000-0x00007FFEB4791000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/3728-9-0x00007FFEB3CD0000-0x00007FFEB4791000-memory.dmp
memory/1356-8-0x00007FFEB3CD0000-0x00007FFEB4791000-memory.dmp
memory/3728-10-0x00007FFEB3CD0000-0x00007FFEB4791000-memory.dmp
memory/3728-11-0x000000001BC10000-0x000000001BC60000-memory.dmp
memory/3728-12-0x000000001C1B0000-0x000000001C262000-memory.dmp
memory/3728-13-0x00007FFEB3CD0000-0x00007FFEB4791000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-25 07:39
Reported
2024-10-25 07:45
Platform
win10ltsc2021-20241023-en
Max time kernel
298s
Max time network
301s
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 |
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\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3724 wrote to memory of 4612 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3724 wrote to memory of 4612 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 72.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | fd.api.iris.microsoft.com | udp |
| IE | 20.223.36.55:443 | fd.api.iris.microsoft.com | tcp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp | |
| N/A | 192.168.1.103:4782 | tcp |
Files
memory/3724-0-0x00007FF8F3553000-0x00007FF8F3555000-memory.dmp
memory/3724-1-0x00000000007F0000-0x0000000000B14000-memory.dmp
memory/3724-2-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/4612-5-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp
memory/3724-6-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp
memory/4612-7-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp
memory/4612-8-0x0000000002E50000-0x0000000002EA0000-memory.dmp
memory/4612-9-0x000000001E330000-0x000000001E3E2000-memory.dmp
memory/4612-10-0x00007FF8F3550000-0x00007FF8F4012000-memory.dmp