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 WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-10-25 07:37
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 07:37
Reported
2024-10-25 07:42
Platform
win10v2004-20241007-en
Max time kernel
297s
Max time network
299s
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 1364 wrote to memory of 4292 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1364 wrote to memory of 4292 | 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 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.160.190.20.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 | |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.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 | |
| US | 8.8.8.8:53 | 138.201.86.20.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 | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| 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 |
Files
memory/1364-0-0x00007FF878A33000-0x00007FF878A35000-memory.dmp
memory/1364-1-0x00000000003A0000-0x00000000006C4000-memory.dmp
memory/1364-2-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/4292-8-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp
memory/1364-9-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp
memory/4292-10-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp
memory/4292-11-0x000000001BF40000-0x000000001BF90000-memory.dmp
memory/4292-12-0x000000001C050000-0x000000001C102000-memory.dmp
memory/4292-13-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-25 07:37
Reported
2024-10-25 07:42
Platform
win10ltsc2021-20241023-en
Max time kernel
296s
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 4944 wrote to memory of 1772 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 4944 wrote to memory of 1772 | 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 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.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 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | fd.api.iris.microsoft.com | udp |
| FR | 20.74.47.205:443 | fd.api.iris.microsoft.com | tcp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 0.205.248.87.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 | 43.229.111.52.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 |
Files
memory/4944-0-0x00007FFE2AAA3000-0x00007FFE2AAA5000-memory.dmp
memory/4944-1-0x0000000000B10000-0x0000000000E34000-memory.dmp
memory/4944-2-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/4944-5-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp
memory/1772-6-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp
memory/1772-7-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp
memory/1772-8-0x000000001B1C0000-0x000000001B210000-memory.dmp
memory/1772-9-0x000000001DBA0000-0x000000001DC52000-memory.dmp
memory/1772-10-0x00007FFE2AAA0000-0x00007FFE2B562000-memory.dmp