Analysis
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max time kernel
79s -
max time network
80s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
17-04-2024 11:27
Behavioral task
behavioral1
Sample
mainn.exe
Resource
win10v2004-20240412-en
General
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Target
mainn.exe
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Size
3.3MB
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MD5
88daabfadfec7379a7b25ff1602dd7bd
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SHA1
65c3f35d7150df340ca797a2662437933178c9b5
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SHA256
0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79
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SHA512
7a205e62c3608fcad774dea6384ae7da904a2ba090b9b6f30454bd23eab9f54a1dbaffd72c3534c554c468a5efaa90d75f659e74fdba3ee8581cbb9356c68aa2
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SSDEEP
49152:7vBt62XlaSFNWPjljiFa2RoUYI1bxNESEgk/iSLoGdDTHHB72eh2NT:7vr62XlaSFNWPjljiFXRoUYIJxbc
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.12.185:4782
15144cdb-7c06-478d-9be3-8228cfe2eee6
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encryption_key
5FCAB94261E1E836E0ECC532E93B636646535E65
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install_name
Conhost.exe
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log_directory
Scex
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reconnect_delay
3000
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startup_key
Google Chrome
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subdirectory
SubDir
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/4040-0-0x00000000009F0000-0x0000000000D38000-memory.dmp family_quasar C:\Windows\System32\SubDir\Conhost.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
Conhost.exepid process 3216 Conhost.exe -
Drops file in System32 directory 5 IoCs
Processes:
Conhost.exemainn.exedescription ioc process File opened for modification C:\Windows\system32\SubDir\Conhost.exe Conhost.exe File opened for modification C:\Windows\system32\SubDir Conhost.exe File created C:\Windows\system32\SubDir\Conhost.exe mainn.exe File opened for modification C:\Windows\system32\SubDir\Conhost.exe mainn.exe File opened for modification C:\Windows\system32\SubDir mainn.exe -
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 1056 schtasks.exe 1004 schtasks.exe -
Modifies registry class 5 IoCs
Processes:
taskmgr.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000_Classes\Local Settings taskmgr.exe Key created \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell taskmgr.exe Key created \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU taskmgr.exe Set value (data) \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots taskmgr.exe Set value (data) \REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff taskmgr.exe -
Suspicious behavior: EnumeratesProcesses 63 IoCs
Processes:
taskmgr.exepid process 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
mainn.exeConhost.exetaskmgr.exedescription pid process Token: SeDebugPrivilege 4040 mainn.exe Token: SeDebugPrivilege 3216 Conhost.exe Token: SeDebugPrivilege 4840 taskmgr.exe Token: SeSystemProfilePrivilege 4840 taskmgr.exe Token: SeCreateGlobalPrivilege 4840 taskmgr.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
Processes:
taskmgr.exepid process 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe -
Suspicious use of SendNotifyMessage 64 IoCs
Processes:
taskmgr.exepid process 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe 4840 taskmgr.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Conhost.exepid process 3216 Conhost.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
mainn.exeConhost.exedescription pid process target process PID 4040 wrote to memory of 1056 4040 mainn.exe schtasks.exe PID 4040 wrote to memory of 1056 4040 mainn.exe schtasks.exe PID 4040 wrote to memory of 3216 4040 mainn.exe Conhost.exe PID 4040 wrote to memory of 3216 4040 mainn.exe Conhost.exe PID 3216 wrote to memory of 1004 3216 Conhost.exe schtasks.exe PID 3216 wrote to memory of 1004 3216 Conhost.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\mainn.exe"C:\Users\Admin\AppData\Local\Temp\mainn.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4040 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Google Chrome" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Conhost.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
PID:1056 -
C:\Windows\system32\SubDir\Conhost.exe"C:\Windows\system32\SubDir\Conhost.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3216 -
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Google Chrome" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Conhost.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:1004
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /71⤵
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4840
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:2420
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.3MB
MD588daabfadfec7379a7b25ff1602dd7bd
SHA165c3f35d7150df340ca797a2662437933178c9b5
SHA2560268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79
SHA5127a205e62c3608fcad774dea6384ae7da904a2ba090b9b6f30454bd23eab9f54a1dbaffd72c3534c554c468a5efaa90d75f659e74fdba3ee8581cbb9356c68aa2