Analysis
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max time kernel
92s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1836-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe family_quasar -
Executes dropped EXE 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2312 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 4080 schtasks.exe 2872 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exedescription pid process Token: SeDebugPrivilege 1836 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe Token: SeDebugPrivilege 2312 KR6nDu9fLhop1bFe.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2312 KR6nDu9fLhop1bFe.exe 2312 KR6nDu9fLhop1bFe.exe -
Suspicious use of SendNotifyMessage 2 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2312 KR6nDu9fLhop1bFe.exe 2312 KR6nDu9fLhop1bFe.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
KR6nDu9fLhop1bFe.exepid process 2312 KR6nDu9fLhop1bFe.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exeKR6nDu9fLhop1bFe.exedescription pid process target process PID 1836 wrote to memory of 2872 1836 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe schtasks.exe PID 1836 wrote to memory of 2872 1836 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe schtasks.exe PID 1836 wrote to memory of 2312 1836 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe KR6nDu9fLhop1bFe.exe PID 1836 wrote to memory of 2312 1836 a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6.exe KR6nDu9fLhop1bFe.exe PID 2312 wrote to memory of 4080 2312 KR6nDu9fLhop1bFe.exe schtasks.exe PID 2312 wrote to memory of 4080 2312 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
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exeFilesize
3.1MB
MD53a52e34c074990eee6ed67e3237c4c9c
SHA1b7df84535c4d8002cdd7675866617cf9884455c6
SHA256a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
SHA5121553aa7e90b404f715c9b025937da6a4941fd287de9a69afe52e970731c48b3a6e62ae898a4e16164fa57e20183ff86999b37c7ff9c9f77fa0a85bce3916b19c
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memory/1836-0-0x00007FFCBB043000-0x00007FFCBB045000-memory.dmpFilesize
8KB
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memory/1836-1-0x0000000000DB0000-0x00000000010D4000-memory.dmpFilesize
3.1MB
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memory/1836-2-0x00007FFCBB040000-0x00007FFCBBB01000-memory.dmpFilesize
10.8MB
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memory/1836-9-0x00007FFCBB040000-0x00007FFCBBB01000-memory.dmpFilesize
10.8MB
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memory/2312-10-0x00007FFCBB040000-0x00007FFCBBB01000-memory.dmpFilesize
10.8MB
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memory/2312-11-0x00007FFCBB040000-0x00007FFCBBB01000-memory.dmpFilesize
10.8MB
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memory/2312-12-0x000000001C6F0000-0x000000001C740000-memory.dmpFilesize
320KB
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memory/2312-13-0x000000001C800000-0x000000001C8B2000-memory.dmpFilesize
712KB
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memory/2312-16-0x000000001C740000-0x000000001C752000-memory.dmpFilesize
72KB
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memory/2312-17-0x000000001D400000-0x000000001D43C000-memory.dmpFilesize
240KB
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memory/2312-18-0x00007FFCBB040000-0x00007FFCBBB01000-memory.dmpFilesize
10.8MB