Analysis Overview
SHA256
9724121bb6285ee007ee656a20a13cdd111a01fac23d1596a7e6b5e9a6a4cf44
Threat Level: Known bad
The file winapp.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar payload
Quasar RAT
Executes dropped EXE
Drops file in System32 directory
Enumerates physical storage devices
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-27 17:11
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
2023-12-27 17:11
Reported
2023-12-27 17:21
Platform
win10v2004-20231215-en
Max time kernel
590s
Max time network
604s
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:\Windows\system32\WinApp\winapp.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\WinApp\winapp.exe | C:\Users\Admin\AppData\Local\Temp\winapp.exe | N/A |
| File opened for modification | C:\Windows\system32\WinApp\winapp.exe | C:\Users\Admin\AppData\Local\Temp\winapp.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| 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\winapp.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3104 wrote to memory of 2320 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3104 wrote to memory of 2320 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3104 wrote to memory of 2408 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\system32\WinApp\winapp.exe |
| PID 3104 wrote to memory of 2408 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\system32\WinApp\winapp.exe |
| PID 2408 wrote to memory of 320 | N/A | C:\Windows\system32\WinApp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2408 wrote to memory of 320 | N/A | C:\Windows\system32\WinApp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\winapp.exe
"C:\Users\Admin\AppData\Local\Temp\winapp.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "winapp" /sc ONLOGON /tr "C:\Windows\system32\WinApp\winapp.exe" /rl HIGHEST /f
C:\Windows\system32\WinApp\winapp.exe
"C:\Windows\system32\WinApp\winapp.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "winapp" /sc ONLOGON /tr "C:\Windows\system32\WinApp\winapp.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 69.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 63.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.99.105.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| N/A | 192.168.68.121:4782 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 158.240.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| N/A | 192.168.68.121:4782 | tcp | |
| US | 8.8.8.8:53 | 114.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 49.179.17.96.in-addr.arpa | udp |
| N/A | 192.168.68.121:4782 | tcp | |
| US | 8.8.8.8:53 | 205.47.74.20.in-addr.arpa | udp |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.173.189.20.in-addr.arpa | udp |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp |
Files
memory/3104-0-0x00000000000E0000-0x0000000000404000-memory.dmp
memory/3104-1-0x00007FFC46AC0000-0x00007FFC47581000-memory.dmp
memory/3104-2-0x000000001AFE0000-0x000000001AFF0000-memory.dmp
C:\Windows\System32\WinApp\winapp.exe
| MD5 | d392cdbed5244c1fbd5b46d63dd519bc |
| SHA1 | 3811346ed1ef2b549e10e75d508f411b7a1e9d6a |
| SHA256 | 9724121bb6285ee007ee656a20a13cdd111a01fac23d1596a7e6b5e9a6a4cf44 |
| SHA512 | 4378130941bde8fcb009f42fd4addcc70b2f90a9cfa51c08fc00c1c8c307f51c4a62f0c66d996eb8a612d44792958a83d269db34eed9c5e542b1dc505c0f3f50 |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\winapp.exe.log
| MD5 | baf55b95da4a601229647f25dad12878 |
| SHA1 | abc16954ebfd213733c4493fc1910164d825cac8 |
| SHA256 | ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924 |
| SHA512 | 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545 |
memory/3104-10-0x00007FFC46AC0000-0x00007FFC47581000-memory.dmp
memory/2408-9-0x00007FFC46AC0000-0x00007FFC47581000-memory.dmp
memory/2408-11-0x000000001B800000-0x000000001B810000-memory.dmp
memory/2408-12-0x000000001C5B0000-0x000000001C600000-memory.dmp
memory/2408-13-0x000000001C6C0000-0x000000001C772000-memory.dmp
memory/2408-14-0x00007FFC46AC0000-0x00007FFC47581000-memory.dmp
memory/2408-15-0x000000001CFF0000-0x000000001D518000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-27 17:11
Reported
2023-12-27 17:22
Platform
win11-20231215-en
Max time kernel
591s
Max time network
601s
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\WinApp\winapp.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system32\WinApp\winapp.exe | C:\Users\Admin\AppData\Local\Temp\winapp.exe | N/A |
| File opened for modification | C:\Windows\system32\WinApp\winapp.exe | C:\Users\Admin\AppData\Local\Temp\winapp.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| 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\winapp.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\WinApp\winapp.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1044 wrote to memory of 3824 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1044 wrote to memory of 3824 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 1044 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\system32\WinApp\winapp.exe |
| PID 1044 wrote to memory of 2312 | N/A | C:\Users\Admin\AppData\Local\Temp\winapp.exe | C:\Windows\system32\WinApp\winapp.exe |
| PID 2312 wrote to memory of 4172 | N/A | C:\Windows\system32\WinApp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 2312 wrote to memory of 4172 | N/A | C:\Windows\system32\WinApp\winapp.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\winapp.exe
"C:\Users\Admin\AppData\Local\Temp\winapp.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "winapp" /sc ONLOGON /tr "C:\Windows\system32\WinApp\winapp.exe" /rl HIGHEST /f
C:\Windows\system32\WinApp\winapp.exe
"C:\Windows\system32\WinApp\winapp.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "winapp" /sc ONLOGON /tr "C:\Windows\system32\WinApp\winapp.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| US | 52.111.227.14:443 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp | |
| N/A | 192.168.68.121:4782 | tcp |
Files
memory/1044-0-0x00000000003E0000-0x0000000000704000-memory.dmp
memory/1044-2-0x00000000010C0000-0x00000000010D0000-memory.dmp
memory/1044-1-0x00007FFA55970000-0x00007FFA56432000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\winapp.exe.log
| MD5 | b4e91d2e5f40d5e2586a86cf3bb4df24 |
| SHA1 | 31920b3a41aa4400d4a0230a7622848789b38672 |
| SHA256 | 5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210 |
| SHA512 | 968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319 |
memory/1044-9-0x00007FFA55970000-0x00007FFA56432000-memory.dmp
C:\Windows\system32\WinApp\winapp.exe
| MD5 | 479b0ed90ee97a1495fd6a7be0980293 |
| SHA1 | 31cb1679fbd3e4d8158f251b222169ab3d0c05de |
| SHA256 | ae1314d312e7682d6170a89745b04344237ce87bc76a29b8608a4249f70da66b |
| SHA512 | f4a9d1cb6e78aa9566fa034f9a5ea8eaa62b8e2ef2878ad98f985f9863a15746568772c8a7674bdc6032bb204658e29128896071730047b4cd2c86ba7c5a5c79 |
memory/2312-11-0x000000001B080000-0x000000001B090000-memory.dmp
memory/2312-10-0x00007FFA55970000-0x00007FFA56432000-memory.dmp
C:\Windows\System32\WinApp\winapp.exe
| MD5 | 089fff94122e9ac0e7c3aed59b12131a |
| SHA1 | 79c9971d8ef672406a457f95e544e1f15221ed08 |
| SHA256 | 22b65e7e1f36b2394bad598bc2c9b2d2b1ba9a2d77f377d680dc4700b8f8771f |
| SHA512 | 8b01a3313b30a46447b487c646889dfe0364029d80e7f11923b046f8bf356d31383bf532a98368dd47a6a526b5e4a0c86177512a1b1f7d8ee25a22986bf266ee |
memory/2312-12-0x000000001BC80000-0x000000001BCD0000-memory.dmp
memory/2312-13-0x000000001BD90000-0x000000001BE42000-memory.dmp
memory/2312-14-0x00007FFA55970000-0x00007FFA56432000-memory.dmp
memory/2312-15-0x000000001B080000-0x000000001B090000-memory.dmp