Analysis
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max time kernel
30s -
max time network
34s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
18-05-2024 20:18
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 2 IoCs
Processes:
resource yara_rule behavioral1/memory/528-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\Windows\Sub-1.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Sub-1.exepid process 864 Sub-1.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
taskmgr.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 taskmgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A taskmgr.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName taskmgr.exe -
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 4912 schtasks.exe 2756 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
taskmgr.exepid process 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
solara.exeSub-1.exetaskmgr.exedescription pid process Token: SeDebugPrivilege 528 solara.exe Token: SeDebugPrivilege 864 Sub-1.exe Token: SeDebugPrivilege 1696 taskmgr.exe Token: SeSystemProfilePrivilege 1696 taskmgr.exe Token: SeCreateGlobalPrivilege 1696 taskmgr.exe -
Suspicious use of FindShellTrayWindow 21 IoCs
Processes:
Sub-1.exetaskmgr.exepid process 864 Sub-1.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe -
Suspicious use of SendNotifyMessage 21 IoCs
Processes:
Sub-1.exetaskmgr.exepid process 864 Sub-1.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe 1696 taskmgr.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Sub-1.exepid process 864 Sub-1.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
solara.exeSub-1.exedescription pid process target process PID 528 wrote to memory of 2756 528 solara.exe schtasks.exe PID 528 wrote to memory of 2756 528 solara.exe schtasks.exe PID 528 wrote to memory of 864 528 solara.exe Sub-1.exe PID 528 wrote to memory of 864 528 solara.exe Sub-1.exe PID 864 wrote to memory of 4912 864 Sub-1.exe schtasks.exe PID 864 wrote to memory of 4912 864 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
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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)
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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
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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)
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
Network
MITRE ATT&CK Matrix ATT&CK v13
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/528-1-0x0000000000CC0000-0x0000000000FE4000-memory.dmpFilesize
3.1MB
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memory/528-2-0x00007FF9483E0000-0x00007FF948EA1000-memory.dmpFilesize
10.8MB
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memory/528-10-0x00007FF9483E0000-0x00007FF948EA1000-memory.dmpFilesize
10.8MB
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memory/528-0-0x00007FF9483E3000-0x00007FF9483E5000-memory.dmpFilesize
8KB
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memory/864-27-0x000000001D390000-0x000000001D8B8000-memory.dmpFilesize
5.2MB
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memory/864-9-0x00007FF9483E0000-0x00007FF948EA1000-memory.dmpFilesize
10.8MB
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memory/864-11-0x00007FF9483E0000-0x00007FF948EA1000-memory.dmpFilesize
10.8MB
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memory/864-12-0x000000001CA90000-0x000000001CAE0000-memory.dmpFilesize
320KB
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memory/864-13-0x000000001CBA0000-0x000000001CC52000-memory.dmpFilesize
712KB
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memory/864-28-0x00007FF9483E0000-0x00007FF948EA1000-memory.dmpFilesize
10.8MB
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memory/1696-15-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-25-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-26-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-24-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-23-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-22-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-21-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-20-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-16-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB
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memory/1696-14-0x00000168A7360000-0x00000168A7361000-memory.dmpFilesize
4KB