Analysis
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max time kernel
128s -
max time network
141s -
platform
windows7_x64 -
resource
win7-20240705-en -
resource tags
arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system -
submitted
18/08/2024, 21:22
Behavioral task
behavioral1
Sample
Client-built.exe
Resource
win7-20240705-en
General
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Target
Client-built.exe
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Size
3.3MB
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MD5
9eb8732b560208f0380c386771aba096
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SHA1
d2ae1ff6755e79f97485aea27912ed7710378b08
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SHA256
d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0
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SHA512
686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a
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SSDEEP
49152:B6LFXL5Z8hlPKxXavF01l+5I2jPTHHB72eh2NT1:B6p5Z8hlPKxXavFkl0M
Malware Config
Extracted
quasar
1.4.1
SKIDS
147.185.221.22:6712
9dcff5fc-a88b-409b-a00a-590c080de54a
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encryption_key
5678253D7FFD68D83D55A584486F1015D2B1BC30
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install_name
Windows Host Process.exe
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log_directory
Windows-Logs
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reconnect_delay
3000
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startup_key
Windows Host Process
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subdirectory
Windows
Signatures
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Quasar payload 3 IoCs
resource yara_rule behavioral1/memory/3016-1-0x00000000013D0000-0x0000000001728000-memory.dmp family_quasar behavioral1/files/0x0031000000016d1d-6.dat family_quasar behavioral1/memory/2800-10-0x0000000000350000-0x00000000006A8000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
pid Process 2800 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 2832 schtasks.exe 2660 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3016 Client-built.exe Token: SeDebugPrivilege 2800 Windows Host Process.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2800 Windows Host Process.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 2800 Windows Host Process.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2800 Windows Host Process.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 3016 wrote to memory of 2660 3016 Client-built.exe 30 PID 3016 wrote to memory of 2660 3016 Client-built.exe 30 PID 3016 wrote to memory of 2660 3016 Client-built.exe 30 PID 3016 wrote to memory of 2800 3016 Client-built.exe 32 PID 3016 wrote to memory of 2800 3016 Client-built.exe 32 PID 3016 wrote to memory of 2800 3016 Client-built.exe 32 PID 2800 wrote to memory of 2832 2800 Windows Host Process.exe 33 PID 2800 wrote to memory of 2832 2800 Windows Host Process.exe 33 PID 2800 wrote to memory of 2832 2800 Windows Host Process.exe 33 -
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
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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:3016 -
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:2660
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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:2800 -
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:2832
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.3MB
MD59eb8732b560208f0380c386771aba096
SHA1d2ae1ff6755e79f97485aea27912ed7710378b08
SHA256d00477c11f3c8ad73a0ea9c3c4b7e549754ed63b645a3a8f57de6dd2f89ec8d0
SHA512686b1968a19d6f81562df6efd659060ecc7d2eceb7b053d530e8bcba030db6e7b55cb7c6364d6dddc7ea9a46b5004cae3a78db5b432ed279ce2fa854fa400b8a