Analysis
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max time kernel
141s -
max time network
145s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
18-05-2024 20:12
Behavioral task
behavioral1
Sample
solara.exe
Resource
win7-20240508-en
General
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Target
solara.exe
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Size
3.1MB
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MD5
9c9e1009cf33ab0f1652ccd8a5f845c1
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SHA1
42d9282a9443175c4f64a7fce83fb39878aa6600
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SHA256
85d92e5e062b2e847e0334ed5afef5e7ff708e87ba6f25e31be00a0570827b98
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SHA512
89f3bd5700024260e82369e97c43a6a82a10bc5a7330f0b73dd3c53037e4aa8f9e535727feb58df2e8c54ec48ac9a397dadc49cf1f7cfeaffa00134714e80118
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SSDEEP
49152:SvtI22SsaNYfdPBldt698dBcjHDPRJ6/bR3LoGdSTHHB72eh2NT:Svm22SsaNYfdPBldt6+dBcjHDPRJ6R
Malware Config
Extracted
quasar
1.4.1
consis
192.168.0.75:4783
7c58e842-ae6e-4f79-bca8-c40fc05002b5
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encryption_key
3F4E1662FE86BE65EF2C4E1F0FEFAABC94765DDB
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install_name
Sub-1.exe
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log_directory
Logs
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reconnect_delay
1500
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startup_key
Quasar Client Startup
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subdirectory
Windows
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1700-1-0x0000000000160000-0x0000000000484000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe family_quasar behavioral1/memory/3024-10-0x0000000000010000-0x0000000000334000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Sub-1.exepid process 3024 Sub-1.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2732 schtasks.exe 1728 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
solara.exeSub-1.exedescription pid process Token: SeDebugPrivilege 1700 solara.exe Token: SeDebugPrivilege 3024 Sub-1.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
Sub-1.exepid process 3024 Sub-1.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
Sub-1.exepid process 3024 Sub-1.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Sub-1.exepid process 3024 Sub-1.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
solara.exeSub-1.exedescription pid process target process PID 1700 wrote to memory of 1728 1700 solara.exe schtasks.exe PID 1700 wrote to memory of 1728 1700 solara.exe schtasks.exe PID 1700 wrote to memory of 1728 1700 solara.exe schtasks.exe PID 1700 wrote to memory of 3024 1700 solara.exe Sub-1.exe PID 1700 wrote to memory of 3024 1700 solara.exe Sub-1.exe PID 1700 wrote to memory of 3024 1700 solara.exe Sub-1.exe PID 3024 wrote to memory of 2732 3024 Sub-1.exe schtasks.exe PID 3024 wrote to memory of 2732 3024 Sub-1.exe schtasks.exe PID 3024 wrote to memory of 2732 3024 Sub-1.exe schtasks.exe -
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\solara.exe"C:\Users\Admin\AppData\Local\Temp\solara.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:1728 -
C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe"C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3024 -
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:2732
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exeFilesize
3.1MB
MD59c9e1009cf33ab0f1652ccd8a5f845c1
SHA142d9282a9443175c4f64a7fce83fb39878aa6600
SHA25685d92e5e062b2e847e0334ed5afef5e7ff708e87ba6f25e31be00a0570827b98
SHA51289f3bd5700024260e82369e97c43a6a82a10bc5a7330f0b73dd3c53037e4aa8f9e535727feb58df2e8c54ec48ac9a397dadc49cf1f7cfeaffa00134714e80118
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memory/1700-0-0x000007FEF5D53000-0x000007FEF5D54000-memory.dmpFilesize
4KB
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memory/1700-1-0x0000000000160000-0x0000000000484000-memory.dmpFilesize
3.1MB
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memory/1700-2-0x000007FEF5D50000-0x000007FEF673C000-memory.dmpFilesize
9.9MB
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memory/1700-9-0x000007FEF5D50000-0x000007FEF673C000-memory.dmpFilesize
9.9MB
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memory/3024-8-0x000007FEF5D50000-0x000007FEF673C000-memory.dmpFilesize
9.9MB
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memory/3024-10-0x0000000000010000-0x0000000000334000-memory.dmpFilesize
3.1MB
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memory/3024-11-0x000007FEF5D50000-0x000007FEF673C000-memory.dmpFilesize
9.9MB
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memory/3024-12-0x000007FEF5D50000-0x000007FEF673C000-memory.dmpFilesize
9.9MB