Analysis
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max time kernel
120s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240729-en -
resource tags
arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system -
submitted
25/08/2024, 08:41
Behavioral task
behavioral1
Sample
3fa8173cb89c967ea4828a933a9e42e0N.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
3fa8173cb89c967ea4828a933a9e42e0N.exe
Resource
win10v2004-20240802-en
General
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Target
3fa8173cb89c967ea4828a933a9e42e0N.exe
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Size
2.6MB
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MD5
3fa8173cb89c967ea4828a933a9e42e0
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SHA1
e62757b9a9d44aab83fb6d4a6575c8ea71029ed6
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SHA256
d629977c9ff1649c48d93d2fc489bf8591660a5aa9edd8208b71bf8786658ac9
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SHA512
842d6faf1a310c93e4de8f23426e95bbd68b082256f01ec3f4591628a1c07b6d8102e185a050fbd1fc93e8943fd901ed18c324757c2d5b4e15c97d3df5ec4dd6
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SSDEEP
49152:lS5IvAG44oOCdcSzNIJG70V6Do4yV/5mc5aNZJ350zg5bEJ60IZGnpw/YA:lS5G4DOT5JGIVzh/5aZX0zgd0IZGpwF
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" svchost.exe -
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 5 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 3fa8173cb89c967ea4828a933a9e42e0N.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ explorer.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ spoolsv.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ svchost.exe Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ spoolsv.exe -
Checks BIOS information in registry 2 TTPs 10 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion 3fa8173cb89c967ea4828a933a9e42e0N.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 3fa8173cb89c967ea4828a933a9e42e0N.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion spoolsv.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion spoolsv.exe -
Executes dropped EXE 4 IoCs
pid Process 2688 explorer.exe 2792 spoolsv.exe 2564 svchost.exe 2596 spoolsv.exe -
Loads dropped DLL 4 IoCs
pid Process 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2688 explorer.exe 2792 spoolsv.exe 2564 svchost.exe -
resource yara_rule behavioral1/memory/2488-0-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/files/0x0009000000015f10-7.dat themida behavioral1/memory/2488-9-0x00000000037A0000-0x0000000003DB3000-memory.dmp themida behavioral1/memory/2688-12-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/files/0x00080000000160ab-18.dat themida behavioral1/memory/2792-24-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/files/0x000800000001629c-34.dat themida behavioral1/memory/2488-37-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2564-36-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2596-44-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2596-49-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2792-51-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2488-53-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2688-54-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2564-56-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2688-57-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2564-68-0x0000000000400000-0x0000000000A13000-memory.dmp themida behavioral1/memory/2688-69-0x0000000000400000-0x0000000000A13000-memory.dmp themida -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" svchost.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\resources\\svchost.exe RO" explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\resources\\themes\\explorer.exe RO" svchost.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA 3fa8173cb89c967ea4828a933a9e42e0N.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA explorer.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA spoolsv.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA svchost.exe Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA spoolsv.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\explorer.exe svchost.exe File opened for modification C:\Windows\SysWOW64\explorer.exe explorer.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
pid Process 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2688 explorer.exe 2792 spoolsv.exe 2564 svchost.exe 2596 spoolsv.exe -
Drops file in Windows directory 4 IoCs
description ioc Process File opened for modification \??\c:\windows\resources\themes\explorer.exe 3fa8173cb89c967ea4828a933a9e42e0N.exe File opened for modification \??\c:\windows\resources\spoolsv.exe explorer.exe File opened for modification \??\c:\windows\resources\svchost.exe spoolsv.exe File opened for modification C:\Windows\Resources\tjud.exe explorer.exe -
System Location Discovery: System Language Discovery 1 TTPs 7 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 3fa8173cb89c967ea4828a933a9e42e0N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language spoolsv.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2604 schtasks.exe 2364 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2688 explorer.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2564 svchost.exe 2688 explorer.exe 2688 explorer.exe 2688 explorer.exe 2564 svchost.exe 2564 svchost.exe 2688 explorer.exe 2688 explorer.exe 2564 svchost.exe 2688 explorer.exe 2564 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 2 IoCs
pid Process 2564 svchost.exe 2688 explorer.exe -
Suspicious use of SetWindowsHookEx 10 IoCs
pid Process 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 2688 explorer.exe 2688 explorer.exe 2792 spoolsv.exe 2792 spoolsv.exe 2564 svchost.exe 2564 svchost.exe 2596 spoolsv.exe 2596 spoolsv.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 2488 wrote to memory of 2688 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 30 PID 2488 wrote to memory of 2688 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 30 PID 2488 wrote to memory of 2688 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 30 PID 2488 wrote to memory of 2688 2488 3fa8173cb89c967ea4828a933a9e42e0N.exe 30 PID 2688 wrote to memory of 2792 2688 explorer.exe 31 PID 2688 wrote to memory of 2792 2688 explorer.exe 31 PID 2688 wrote to memory of 2792 2688 explorer.exe 31 PID 2688 wrote to memory of 2792 2688 explorer.exe 31 PID 2792 wrote to memory of 2564 2792 spoolsv.exe 32 PID 2792 wrote to memory of 2564 2792 spoolsv.exe 32 PID 2792 wrote to memory of 2564 2792 spoolsv.exe 32 PID 2792 wrote to memory of 2564 2792 spoolsv.exe 32 PID 2564 wrote to memory of 2596 2564 svchost.exe 33 PID 2564 wrote to memory of 2596 2564 svchost.exe 33 PID 2564 wrote to memory of 2596 2564 svchost.exe 33 PID 2564 wrote to memory of 2596 2564 svchost.exe 33 PID 2688 wrote to memory of 3008 2688 explorer.exe 34 PID 2688 wrote to memory of 3008 2688 explorer.exe 34 PID 2688 wrote to memory of 3008 2688 explorer.exe 34 PID 2688 wrote to memory of 3008 2688 explorer.exe 34 PID 2564 wrote to memory of 2604 2564 svchost.exe 35 PID 2564 wrote to memory of 2604 2564 svchost.exe 35 PID 2564 wrote to memory of 2604 2564 svchost.exe 35 PID 2564 wrote to memory of 2604 2564 svchost.exe 35 PID 2564 wrote to memory of 2364 2564 svchost.exe 38 PID 2564 wrote to memory of 2364 2564 svchost.exe 38 PID 2564 wrote to memory of 2364 2564 svchost.exe 38 PID 2564 wrote to memory of 2364 2564 svchost.exe 38
Processes
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C:\Users\Admin\AppData\Local\Temp\3fa8173cb89c967ea4828a933a9e42e0N.exe"C:\Users\Admin\AppData\Local\Temp\3fa8173cb89c967ea4828a933a9e42e0N.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2488 -
\??\c:\windows\resources\themes\explorer.exec:\windows\resources\themes\explorer.exe2⤵
- Modifies visiblity of hidden/system files in Explorer
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2688 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe SE3⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2792 -
\??\c:\windows\resources\svchost.exec:\windows\resources\svchost.exe4⤵
- Modifies visiblity of hidden/system files in Explorer
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2564 -
\??\c:\windows\resources\spoolsv.exec:\windows\resources\spoolsv.exe PR5⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2596
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:43 /f5⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2604
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 08:44 /f5⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2364
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C:\Windows\Explorer.exeC:\Windows\Explorer.exe3⤵PID:3008
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
2Virtualization/Sandbox Evasion
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.6MB
MD55ac319cdd23bc56e986978473f831182
SHA11564ce3320cf35b59f3b3e0acc83b00f852c4c4f
SHA256e3e8367ae8eaf2178eab67fede8b5ea54c1c93de4c3fe3edb725f082366199a3
SHA51236aaed1c8aa039b37c558aecac10049b12db3e19133deaafd424f3c069c8b40131a124eaf8642f5f929330a00ffecb63b5512a40a25092d52dd55c33a716d8fc
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Filesize
2.6MB
MD50e79a0dbfadc2871e127cce26a09c0ec
SHA14af0942199a3061298e8c9957923aec6ca4b3e18
SHA256e7108bd74f4165f44fd00364d4e22043df298b8ce23394963f7652043c8932a5
SHA51207b3f44b327fc94e9ae9a75179e1f28d74aab1bc0b2344f04b0efb6adcf9ff3771134e656777c24ffb8a18ca10fc342120de9c5024f57acc10ad67fcd97e8f3f
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Filesize
2.6MB
MD5fdf0b63d47efb66e27b66e26bde76b0f
SHA16307aa855671ec092d8c53f486b96c5bd584ab67
SHA256d37a4492cd47d212c59afb6a488d78986e54a9c51e8a553250accc0848e8fc75
SHA512ec454158e61c6082e6778f88e0dcd078a735d5bec3edd952622aa569c487c759f6480e0d3784e629fcd52176c7661df56631d06d02ed36f454c16c56c49c21ba