Analysis
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max time kernel
104s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
09-01-2024 16:24
Static task
static1
Behavioral task
behavioral1
Sample
26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe
Resource
win10v2004-20231222-en
General
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Target
26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe
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Size
312KB
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MD5
75505a5eb3732fa2c8ed637ab7514b0f
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SHA1
74cf43c52a315641946f39fd7bf4865d2d7ff410
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SHA256
26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4
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SHA512
21f2f8cece51837f53ffb630344417026f3cda4de62f058547d4d8287878a70222b2d18807d0608f9af1d7e795c063f32eff7f12a4420a09c3a60a9137a6ff82
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SSDEEP
3072:7jMaOxMqALKoRSVVjqsPMBU5xR1Tst0IsYcJPCXEz5/siT9QHHARTYFkc:7qx0L1RSVVjEBQZst0I+wCRT+bFk
Malware Config
Extracted
smokeloader
up3
Extracted
smokeloader
2020
http://host-file-host6.com/
http://host-host-file8.com/
Signatures
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Modifies firewall policy service 2 TTPs 4 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile\EnableFirewall = "0" explorer.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile explorer.exe Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" explorer.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\PublicProfile explorer.exe -
SmokeLoader
Modular backdoor trojan in use since 2014.
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Sets file execution options in registry 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sm3359q1giu.exe C091.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sm3359q1giu.exe\DisableExceptionChainValidation C091.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe\Debugger = "cyy.exe" explorer.exe -
Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion explorer.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation C526.exe -
Deletes itself 1 IoCs
pid Process 3520 Process not Found -
Executes dropped EXE 3 IoCs
pid Process 440 C091.exe 5188 C526.exe 2444 WindowsUpdater.exe -
Loads dropped DLL 2 IoCs
pid Process 2444 WindowsUpdater.exe 2444 WindowsUpdater.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Java Updater = "C:\\ProgramData\\Java Updater\\sm3359q1giu.exe" explorer.exe Set value (str) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Updater = "\"C:\\ProgramData\\Java Updater\\sm3359q1giu.exe\"" explorer.exe -
description ioc Process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C091.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs
pid Process 440 C091.exe 3324 explorer.exe 3324 explorer.exe 3324 explorer.exe 3324 explorer.exe 3324 explorer.exe 3324 explorer.exe 3324 explorer.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 2 IoCs
pid pid_target Process procid_target 952 1988 WerFault.exe 71 5612 3324 WerFault.exe 102 -
Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe -
Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString explorer.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C091.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C091.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS explorer.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer explorer.exe -
Modifies Internet Explorer Protected Mode 1 TTPs 4 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3" explorer.exe -
Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1" explorer.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Software\Microsoft\Internet Explorer\Main explorer.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1988 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe 1988 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found 3520 Process not Found -
Suspicious behavior: MapViewOfSection 3 IoCs
pid Process 1988 26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe 440 C091.exe 440 C091.exe -
Suspicious use of AdjustPrivilegeToken 32 IoCs
description pid Process Token: SeShutdownPrivilege 3520 Process not Found Token: SeCreatePagefilePrivilege 3520 Process not Found Token: SeDebugPrivilege 440 C091.exe Token: SeRestorePrivilege 440 C091.exe Token: SeBackupPrivilege 440 C091.exe Token: SeLoadDriverPrivilege 440 C091.exe Token: SeCreatePagefilePrivilege 440 C091.exe Token: SeShutdownPrivilege 440 C091.exe Token: SeTakeOwnershipPrivilege 440 C091.exe Token: SeChangeNotifyPrivilege 440 C091.exe Token: SeCreateTokenPrivilege 440 C091.exe Token: SeMachineAccountPrivilege 440 C091.exe Token: SeSecurityPrivilege 440 C091.exe Token: SeAssignPrimaryTokenPrivilege 440 C091.exe Token: SeCreateGlobalPrivilege 440 C091.exe Token: 33 440 C091.exe Token: SeDebugPrivilege 3324 explorer.exe Token: SeRestorePrivilege 3324 explorer.exe Token: SeBackupPrivilege 3324 explorer.exe Token: SeLoadDriverPrivilege 3324 explorer.exe Token: SeCreatePagefilePrivilege 3324 explorer.exe Token: SeShutdownPrivilege 3324 explorer.exe Token: SeTakeOwnershipPrivilege 3324 explorer.exe Token: SeChangeNotifyPrivilege 3324 explorer.exe Token: SeCreateTokenPrivilege 3324 explorer.exe Token: SeMachineAccountPrivilege 3324 explorer.exe Token: SeSecurityPrivilege 3324 explorer.exe Token: SeAssignPrimaryTokenPrivilege 3324 explorer.exe Token: SeCreateGlobalPrivilege 3324 explorer.exe Token: 33 3324 explorer.exe Token: SeShutdownPrivilege 3520 Process not Found Token: SeCreatePagefilePrivilege 3520 Process not Found -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 3520 wrote to memory of 440 3520 Process not Found 103 PID 3520 wrote to memory of 440 3520 Process not Found 103 PID 3520 wrote to memory of 440 3520 Process not Found 103 PID 440 wrote to memory of 3324 440 C091.exe 102 PID 440 wrote to memory of 3324 440 C091.exe 102 PID 440 wrote to memory of 3324 440 C091.exe 102 PID 3520 wrote to memory of 5188 3520 Process not Found 104 PID 3520 wrote to memory of 5188 3520 Process not Found 104 PID 3520 wrote to memory of 5188 3520 Process not Found 104 PID 5188 wrote to memory of 2444 5188 C526.exe 105 PID 5188 wrote to memory of 2444 5188 C526.exe 105 PID 5188 wrote to memory of 2444 5188 C526.exe 105 -
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\26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe"C:\Users\Admin\AppData\Local\Temp\26d9592bdfc0e1db9b25e7c3b6d232098bbd7a7ebe8c370df837002adc0f66e4.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1988 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1988 -s 3682⤵
- Program crash
PID:952
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1988 -ip 19881⤵PID:1204
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
- Modifies firewall policy service
- Sets file execution options in registry
- Checks BIOS information in registry
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer Protected Mode
- Modifies Internet Explorer Protected Mode Banner
- Modifies Internet Explorer settings
- Suspicious use of AdjustPrivilegeToken
PID:3324 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3324 -s 11362⤵
- Program crash
PID:5612
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C:\Users\Admin\AppData\Local\Temp\C091.exeC:\Users\Admin\AppData\Local\Temp\C091.exe1⤵
- Sets file execution options in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:440
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C:\Users\Admin\AppData\Local\Temp\C526.exeC:\Users\Admin\AppData\Local\Temp\C526.exe1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:5188 -
C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"C:\Users\Admin\AppData\Local\Temp\WindowsUpdater.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
PID:2444
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3324 -ip 33241⤵PID:4380
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Replay Monitor
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Downloads
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Filesize
360KB
MD580c413180b6bd0dd664adc4e0665b494
SHA1e791e4a3391fc6b7bcb58399cd4fa3c52a06b940
SHA2566d99cec56614b6b8a23dfa84a50c6bbfde535411c6366ac2bcc20c9f5af62880
SHA512347f4ae6f308b37d055a6177478e45ab3838d7020abed70c7aa138d2c3771e709de204da8550aebdcaa6139d869dc7328cc7e645c4dd48d1066f9ad70225644a