Analysis
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max time kernel
148s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
25-06-2024 01:53
Behavioral task
behavioral1
Sample
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
Resource
win7-20240419-en
General
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Target
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe
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Size
3.1MB
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MD5
3a52e34c074990eee6ed67e3237c4c9c
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SHA1
b7df84535c4d8002cdd7675866617cf9884455c6
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SHA256
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
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SHA512
1553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c
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SSDEEP
49152:MvHI22SsaNYfdPBldt698dBcjHuZvgGoGnVvTHHB72eh2NT:Mvo22SsaNYfdPBldt6+dBcjHuZvF
Malware Config
Extracted
quasar
1.4.1
Office04
94.228.166.40:4782
172a89d7-b9b2-4d82-b5ed-6beb5326f544
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encryption_key
7970C2029EDBB83E6BD65073BE18684AC9FF3F48
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install_name
KR6nDu9fLhop1bFe.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
defender.proces
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1680-1-0x00000000009A0000-0x0000000000CC4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe family_quasar behavioral1/memory/2808-8-0x0000000000FD0000-0x00000000012F4000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2808 KR6nDu9fLhop1bFe.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2120 schtasks.exe 2736 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exedescription pid process Token: SeDebugPrivilege 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe Token: SeDebugPrivilege 2808 KR6nDu9fLhop1bFe.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2808 KR6nDu9fLhop1bFe.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2808 KR6nDu9fLhop1bFe.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2808 KR6nDu9fLhop1bFe.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exedescription pid process target process PID 1680 wrote to memory of 2120 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe schtasks.exe PID 1680 wrote to memory of 2120 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe schtasks.exe PID 1680 wrote to memory of 2120 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe schtasks.exe PID 1680 wrote to memory of 2808 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe KR6nDu9fLhop1bFe.exe PID 1680 wrote to memory of 2808 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe KR6nDu9fLhop1bFe.exe PID 1680 wrote to memory of 2808 1680 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe KR6nDu9fLhop1bFe.exe PID 2808 wrote to memory of 2736 2808 KR6nDu9fLhop1bFe.exe schtasks.exe PID 2808 wrote to memory of 2736 2808 KR6nDu9fLhop1bFe.exe schtasks.exe PID 2808 wrote to memory of 2736 2808 KR6nDu9fLhop1bFe.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\a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe"C:\Users\Admin\AppData\Local\Temp\a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exe"schtasks" /create /tn "defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.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 "defender.proces" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exeFilesize
3.1MB
MD53a52e34c074990eee6ed67e3237c4c9c
SHA1b7df84535c4d8002cdd7675866617cf9884455c6
SHA256a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
SHA5121553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c
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memory/1680-0-0x000007FEF5613000-0x000007FEF5614000-memory.dmpFilesize
4KB
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memory/1680-1-0x00000000009A0000-0x0000000000CC4000-memory.dmpFilesize
3.1MB
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memory/1680-2-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmpFilesize
9.9MB
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memory/1680-10-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmpFilesize
9.9MB
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memory/2808-8-0x0000000000FD0000-0x00000000012F4000-memory.dmpFilesize
3.1MB
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memory/2808-11-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmpFilesize
9.9MB
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memory/2808-9-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmpFilesize
9.9MB
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memory/2808-12-0x000007FEF5610000-0x000007FEF5FFC000-memory.dmpFilesize
9.9MB