Analysis Overview
SHA256
b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar family
Quasar payload
Executes dropped EXE
Unsigned PE
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-10-25 07:56
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 07:56
Reported
2024-10-25 07:58
Platform
win7-20240708-en
Max time kernel
150s
Max time network
135s
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 |
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 1700 wrote to memory of 1852 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1700 wrote to memory of 1852 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 1700 wrote to memory of 1852 | 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 |
| 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/1700-0-0x000007FEF6343000-0x000007FEF6344000-memory.dmp
memory/1700-1-0x0000000000B50000-0x0000000000E74000-memory.dmp
memory/1700-2-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/1700-7-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp
memory/1852-9-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp
memory/1852-8-0x00000000001B0000-0x00000000004D4000-memory.dmp
memory/1852-10-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp
memory/1852-11-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-25 07:56
Reported
2024-10-25 07:58
Platform
win10v2004-20241007-en
Max time kernel
135s
Max time network
141s
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 3424 wrote to memory of 1564 | N/A | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3424 wrote to memory of 1564 | 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 | 104.219.191.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 77.190.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.159.190.20.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 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.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 | 241.42.69.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 101.209.201.84.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | 79.190.18.2.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 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| N/A | 192.168.1.103:4782 | tcp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| N/A | 192.168.1.103:4782 | tcp |
Files
memory/3424-0-0x00007FFD40313000-0x00007FFD40315000-memory.dmp
memory/3424-1-0x00000000007E0000-0x0000000000B04000-memory.dmp
memory/3424-2-0x00007FFD40310000-0x00007FFD40DD1000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | e66da355fd3824d7cb83a1460ccdf7ff |
| SHA1 | e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938 |
| SHA256 | b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca |
| SHA512 | 411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856 |
memory/1564-8-0x00007FFD40310000-0x00007FFD40DD1000-memory.dmp
memory/3424-9-0x00007FFD40310000-0x00007FFD40DD1000-memory.dmp
memory/1564-10-0x00007FFD40310000-0x00007FFD40DD1000-memory.dmp
memory/1564-11-0x000000001B020000-0x000000001B070000-memory.dmp
memory/1564-12-0x000000001B470000-0x000000001B522000-memory.dmp
memory/1564-13-0x00007FFD40310000-0x00007FFD40DD1000-memory.dmp