Analysis Overview
SHA256
844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Checks computer location settings
Executes dropped EXE
Drops file in System32 directory
System Network Configuration Discovery: Internet Connection Discovery
Unsigned PE
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Suspicious use of SetWindowsHookEx
Runs ping.exe
Scheduled Task/Job: Scheduled Task
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-18 22:04
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: behavioral2
Detonation Overview
Submitted
2024-08-18 22:04
Reported
2024-08-18 22:11
Platform
win10v2004-20240802-en
Max time kernel
325s
Max time network
329s
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 |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Enumerates physical storage devices
System Network Configuration Discovery: Internet Connection Discovery
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\PING.EXE | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\PING.EXE | N/A |
Scheduled Task/Job: Scheduled Task
| 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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
C:\Windows\system32\Windows\Windows Host Process.exe
"C:\Windows\system32\Windows\Windows Host Process.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /delete /tn "Windows Host Process" /f
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\lnCpXrcf0oWv.bat" "
C:\Windows\system32\chcp.com
chcp 65001
C:\Windows\system32\PING.EXE
ping -n 10 localhost
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 136.32.126.40.in-addr.arpa | udp |
| US | 147.185.221.22:10340 | tcp | |
| US | 8.8.8.8:53 | 22.221.185.147.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 147.185.221.22:10340 | tcp | |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| 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 | 137.71.105.51.in-addr.arpa | udp |
Files
memory/4760-0-0x00007FF90CC43000-0x00007FF90CC45000-memory.dmp
memory/4760-1-0x0000000000770000-0x0000000000AD0000-memory.dmp
memory/4760-2-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
C:\Windows\system32\Windows\Windows Host Process.exe
| MD5 | bc04ef1699a3b490ff2703a0bb2dcca0 |
| SHA1 | b3f70784fb7c7ef0a3cca81280ede2ffe2671e35 |
| SHA256 | 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983 |
| SHA512 | e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1 |
memory/4760-10-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
memory/1788-9-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
memory/1788-11-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
memory/1788-12-0x000000001B1B0000-0x000000001B200000-memory.dmp
memory/1788-13-0x000000001BB40000-0x000000001BBF2000-memory.dmp
memory/1788-14-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
memory/1788-17-0x000000001B260000-0x000000001B272000-memory.dmp
memory/1788-18-0x000000001BAC0000-0x000000001BAFC000-memory.dmp
memory/1788-23-0x00007FF90CC40000-0x00007FF90D701000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\lnCpXrcf0oWv.bat
| MD5 | a004cb3b4e56b606847a9e45983566a0 |
| SHA1 | 3507e1a341551c4099e1b795bd4e2d4086676760 |
| SHA256 | 41954e985436118cc23fa2466ee4f997d3d84dad48691e5646b674f6fe1050c4 |
| SHA512 | 3e45874dddbadac74606402dd3083cf58c2e654d7ffed9192ff9b0452b92cf35f6bf70a4d16f659a0bc3b4c7d7d3247a7a2d05bb992a0b0b4eed6d7c840a8257 |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-18 22:04
Reported
2024-08-18 22:07
Platform
win7-20240704-en
Max time kernel
130s
Max time network
154s
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\Windows\Windows Host Process.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Users\Admin\AppData\Local\Temp\Client-built.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows\Windows Host Process.exe | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| File opened for modification | C:\Windows\system32\Windows | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Scheduled Task/Job: Scheduled Task
| 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\Client-built.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
C:\Windows\system32\Windows\Windows Host Process.exe
"C:\Windows\system32\Windows\Windows Host Process.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp | |
| US | 147.185.221.22:10340 | tcp |
Files
memory/2484-0-0x000007FEF59E3000-0x000007FEF59E4000-memory.dmp
memory/2484-1-0x0000000000010000-0x0000000000370000-memory.dmp
memory/2484-2-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp
C:\Windows\System32\Windows\Windows Host Process.exe
| MD5 | bc04ef1699a3b490ff2703a0bb2dcca0 |
| SHA1 | b3f70784fb7c7ef0a3cca81280ede2ffe2671e35 |
| SHA256 | 844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983 |
| SHA512 | e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1 |
memory/2716-8-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp
memory/2484-10-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp
memory/2716-9-0x0000000000950000-0x0000000000CB0000-memory.dmp
memory/2716-11-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp
memory/2716-12-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp