Analysis
-
max time kernel
865s -
max time network
870s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
18/08/2024, 21:50
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240704-en
General
-
Target
Client-built.exe
-
Size
3.3MB
-
MD5
7021b44ffa619a2a286dd9bd55d1e321
-
SHA1
de69ec28f445e6c47b1d2f4440465f3ffc2df174
-
SHA256
fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
-
SHA512
546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13
-
SSDEEP
49152:G6LFXL5Z8hlPKxXavFTu9sHMI2jixTHHB72eh2NT1:G6p5Z8hlPKxXavFT+ssYc
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:6712
d1acafd6-31e9-4a2f-a5a8-7043dfc62d60
-
encryption_key
5678253D7FFD68D83D55A584486F1015D2B1BC30
-
install_name
Windows Host Process.exe
-
log_directory
Windows-Logs
-
reconnect_delay
3000
-
startup_key
Windows Host Process
-
subdirectory
Windows
Signatures
-
Quasar payload 2 IoCs
resource yara_rule behavioral2/memory/4148-1-0x0000000000330000-0x0000000000688000-memory.dmp family_quasar behavioral2/files/0x00070000000233ff-6.dat family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2172 Windows Host Process.exe -
Drops file in System32 directory 5 IoCs
description ioc Process File created C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Client-built.exe File opened for modification C:\Windows\system32\Windows Client-built.exe File opened for modification C:\Windows\system32\Windows\Windows Host Process.exe Windows Host Process.exe File opened for modification C:\Windows\system32\Windows Windows Host Process.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4556 schtasks.exe 3288 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4148 Client-built.exe Token: SeDebugPrivilege 2172 Windows Host Process.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
pid Process 2172 Windows Host Process.exe 2172 Windows Host Process.exe 2172 Windows Host Process.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 2172 Windows Host Process.exe 2172 Windows Host Process.exe 2172 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2172 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 4148 wrote to memory of 4556 4148 Client-built.exe 87 PID 4148 wrote to memory of 4556 4148 Client-built.exe 87 PID 4148 wrote to memory of 2172 4148 Client-built.exe 90 PID 4148 wrote to memory of 2172 4148 Client-built.exe 90 PID 2172 wrote to memory of 3288 2172 Windows Host Process.exe 91 PID 2172 wrote to memory of 3288 2172 Windows Host Process.exe 91 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4148 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
PID:4556
-
-
C:\Windows\system32\Windows\Windows Host Process.exe"C:\Windows\system32\Windows\Windows Host Process.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2172 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
PID:3288
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
3.3MB
MD57021b44ffa619a2a286dd9bd55d1e321
SHA1de69ec28f445e6c47b1d2f4440465f3ffc2df174
SHA256fd96603f9b5aa63021f7bbf8cb6aa320154b43f53c62ddeb011a395327c6093e
SHA512546909a07d8e229c0510c249c4b31c78d699a31130e9933ecc03cc2a1b4a7778bbcb872668aab8575050fe4b6c72715164f290a368dd6471e1c492393cf04f13