Analysis Overview
SHA256
2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8
Threat Level: Known bad
The file Client-built.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Quasar family
Executes dropped EXE
Checks computer location settings
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 FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
Suspicious use of SendNotifyMessage
Scheduled Task/Job: Scheduled Task
Runs ping.exe
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-18 21:19
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
2024-08-18 21:19
Reported
2024-08-18 21:22
Platform
win7-20240705-en
Max time kernel
150s
Max time network
150s
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 FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | 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 | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp | |
| US | 147.185.221.22:6712 | tcp |
Files
memory/2676-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp
memory/2676-1-0x0000000000F70000-0x00000000012C8000-memory.dmp
memory/2676-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp
C:\Windows\System32\Windows\Windows Host Process.exe
| MD5 | 449c9192baa7503151f8bb30aa32153b |
| SHA1 | 3906a9de42cb337d89e49542660f38144138d7ba |
| SHA256 | 2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8 |
| SHA512 | c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624 |
memory/2152-8-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp
memory/2676-10-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp
memory/2152-9-0x0000000000AB0000-0x0000000000E08000-memory.dmp
memory/2152-11-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp
memory/2152-12-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-18 21:19
Reported
2024-08-18 21:24
Platform
win10v2004-20240802-en
Max time kernel
234s
Max time network
252s
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-1-5-21-2170637797-568393320-3232933035-1000\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 FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | N/A | C:\Windows\system32\Windows\Windows Host Process.exe | N/A |
| N/A | 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:\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 --field-trial-handle=4280,i,10065386245627775856,6567048529106473151,262144 --variations-seed-version --mojo-platform-channel-handle=4316 /prefetch:8
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\bx6FdaD96gxH.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 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 147.185.221.22:6712 | tcp | |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.221.185.147.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ipwho.is | udp |
| DE | 195.201.57.90:443 | ipwho.is | tcp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 90.57.201.195.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 209.205.72.20.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 | 34.58.20.217.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | 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 |
Files
memory/1840-0-0x00007FFAABA03000-0x00007FFAABA05000-memory.dmp
memory/1840-1-0x0000000000D90000-0x00000000010E8000-memory.dmp
memory/1840-2-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
C:\Windows\System32\Windows\Windows Host Process.exe
| MD5 | 449c9192baa7503151f8bb30aa32153b |
| SHA1 | 3906a9de42cb337d89e49542660f38144138d7ba |
| SHA256 | 2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8 |
| SHA512 | c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624 |
memory/3980-10-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
memory/1840-9-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
memory/3980-11-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
memory/3980-12-0x000000001B9E0000-0x000000001BA30000-memory.dmp
memory/3980-13-0x000000001BAF0000-0x000000001BBA2000-memory.dmp
memory/3980-16-0x000000001BA30000-0x000000001BA42000-memory.dmp
memory/3980-17-0x000000001BA90000-0x000000001BACC000-memory.dmp
memory/3980-18-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
memory/3980-19-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
memory/3980-24-0x00007FFAABA00000-0x00007FFAAC4C1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\bx6FdaD96gxH.bat
| MD5 | bceb5c01be57a249cb983921d8ab6409 |
| SHA1 | dc7e3b73f1712958968bddb9865cefa44b1e6678 |
| SHA256 | 89596be1ef525b7a9db4104be661842177a9c9225b795d0efadbec6473dda978 |
| SHA512 | 5b7a8a3ad63bafe5359f43e92394df997695e024c0cd97683a6d22d6ab6c0d222acb8465457a47d2f87c0ed3f011a150c4db03e9fb9cceecbb0d021a0972dbb5 |