Analysis
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max time kernel
147s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
18-04-2024 14:29
General
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Target
asdasd.exe
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Size
3.1MB
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MD5
30fdc0a0d22cca3c0b971c7928ca0e82
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SHA1
517211383e5022bec91b521955832a69417f4042
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SHA256
39f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f
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SHA512
dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404
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SSDEEP
49152:Dv7I22SsaNYfdPBldt698dBcjHn8RJ61bR3LoGdFZTHHB72eh2NT:DvE22SsaNYfdPBldt6+dBcjHn8RJ6H
Malware Config
Extracted
quasar
1.4.1
Office04
193.161.193.99:1194
192.168.254.152:1194
37c3d2aa-6a36-4ee8-a4be-f1c3187fbd03
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encryption_key
E9EE5B51F341491A9CE8837BE89BB18191B86C1E
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
python
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/4452-0-0x0000000000A50000-0x0000000000D74000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Client.exepid process 4392 Client.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 2132 schtasks.exe 1244 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
asdasd.exeClient.exedescription pid process Token: SeDebugPrivilege 4452 asdasd.exe Token: SeDebugPrivilege 4392 Client.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
Client.exepid process 4392 Client.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
Client.exepid process 4392 Client.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Client.exepid process 4392 Client.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
asdasd.exeClient.exedescription pid process target process PID 4452 wrote to memory of 1244 4452 asdasd.exe schtasks.exe PID 4452 wrote to memory of 1244 4452 asdasd.exe schtasks.exe PID 4452 wrote to memory of 4392 4452 asdasd.exe Client.exe PID 4452 wrote to memory of 4392 4452 asdasd.exe Client.exe PID 4392 wrote to memory of 2132 4392 Client.exe schtasks.exe PID 4392 wrote to memory of 2132 4392 Client.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\asdasd.exe"C:\Users\Admin\AppData\Local\Temp\asdasd.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4452 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:1244 -
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.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:4392 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "python" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:2132
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD530fdc0a0d22cca3c0b971c7928ca0e82
SHA1517211383e5022bec91b521955832a69417f4042
SHA25639f626850f3dbd66ff5b75f99cd531cf74e4418338ddd45d0ae20fb7ceda2b6f
SHA512dcd9ae5e6ce11c93826b2d7b4d9acd201ac53cd41f20d815b308d2f3fd938b3774ea6d64f9f13ce159238ddbead7e8e126d514fe85af0da11d416de94415b404