Analysis Overview
SHA256
ef2c6cf5a0ba1b81ab22164b7820f49761de4f6feb8fa4e5c64a1bfad369cc74
Threat Level: Known bad
The file aa.exe was found to be: Known bad.
Malicious Activity Summary
Quasar RAT
Quasar payload
Quasar family
Executes dropped EXE
Unsigned PE
Enumerates physical storage devices
Uses Task Scheduler COM API
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-18 14:18
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
2024-04-18 14:18
Reported
2024-04-18 14:23
Platform
win10v2004-20240226-en
Max time kernel
282s
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 |
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\aa.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\aa.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3364 wrote to memory of 2320 | N/A | C:\Users\Admin\AppData\Local\Temp\aa.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3364 wrote to memory of 2320 | N/A | C:\Users\Admin\AppData\Local\Temp\aa.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3364 wrote to memory of 3596 | N/A | C:\Users\Admin\AppData\Local\Temp\aa.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3364 wrote to memory of 3596 | N/A | C:\Users\Admin\AppData\Local\Temp\aa.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3596 wrote to memory of 1112 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3596 wrote to memory of 1112 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\aa.exe
"C:\Users\Admin\AppData\Local\Temp\aa.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4132 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
C:\Users\Admin\AppData\Local\Temp\aa.exe
"C:\Users\Admin\AppData\Local\Temp\aa.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 74.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| N/A | 192.168.254.152:4782 | tcp | |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| PH | 180.190.63.111:8080 | tcp | |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| GB | 216.58.212.202:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | 202.212.58.216.in-addr.arpa | udp |
| N/A | 192.168.254.152:4782 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| PH | 180.190.63.111:8080 | tcp | |
| N/A | 192.168.254.152:4782 | tcp | |
| PH | 180.190.63.111:8080 | tcp | |
| US | 8.8.8.8:53 | 214.143.182.52.in-addr.arpa | udp |
| N/A | 192.168.254.152:4782 | tcp | |
| PH | 180.190.63.111:8080 | tcp | |
| N/A | 192.168.254.152:4782 | tcp | |
| PH | 180.190.63.111:8080 | tcp | |
| N/A | 192.168.254.152:4782 | tcp | |
| PH | 180.190.63.111:8080 | tcp |
Files
memory/3364-0-0x0000000000200000-0x0000000000524000-memory.dmp
memory/3364-1-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/3364-2-0x000000001B3B0000-0x000000001B3C0000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | a1b18584a5906f5be41db7dd83325caa |
| SHA1 | 749e349a70fb0a2778900fceb15ff7f3ed033196 |
| SHA256 | ef2c6cf5a0ba1b81ab22164b7820f49761de4f6feb8fa4e5c64a1bfad369cc74 |
| SHA512 | 037e7b94ccea547a113304aa73fb940401c18a8e1d3df5681a191b0f9292769419f48bf8fe1f6f69534f320f34fabac638735d2e3ea2ff12039518193dca4ede |
memory/3364-9-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/3596-10-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/3596-11-0x000000001B690000-0x000000001B6A0000-memory.dmp
memory/3596-12-0x000000001C6D0000-0x000000001C720000-memory.dmp
memory/3596-13-0x000000001C7E0000-0x000000001C892000-memory.dmp
memory/3596-14-0x000000001CFD0000-0x000000001D4F8000-memory.dmp
memory/3596-16-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/3596-17-0x000000001B690000-0x000000001B6A0000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\aa.exe.log
| MD5 | baf55b95da4a601229647f25dad12878 |
| SHA1 | abc16954ebfd213733c4493fc1910164d825cac8 |
| SHA256 | ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924 |
| SHA512 | 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545 |
memory/3528-21-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp
memory/3528-22-0x000000001BAA0000-0x000000001BAB0000-memory.dmp
memory/3528-23-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp