Analysis
- max time kernel
149s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system - submitted
24/12/2022, 15:55
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
windows7-x64
5 signatures
150 seconds
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
22 signatures
150 seconds
General
- Target file.exe
- Size 224KB
- Sample221224-tcsdesdd4x
- SHA256 a2c503ead7674dc70b35e266b24ae22cb64e086541fb2b746bb3c86524be714b
- MD5 1e161847031728865a7bc67cabdacac6
- SHA1 81d6e2bbdfc5ab86b15a336b33bef00b303957c8
- SHA512 7d61194cd98f2b5c65ae24f02b2d52f90185751145a60d41b437cd7a21180d12fec735d34187581dfdb44d5a1a338a8cb9deaae2f7fc015ff224cecd6c684e65
- SSDEEP 3072:TDgkT/LAtgI5lxUcFueTbwCeb+pue78Nr5wjKayi5YfzauD1LQ4f/ln:7LAKPcTU5+NINeDhYbaM1d
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
resource yara_rule behavioral2/memory/1600-133-0x00000000009F0000-0x00000000009F9000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 3 IoCs
flow pid Process 45 3092 rundll32.exe 50 3092 rundll32.exe 63 3092 rundll32.exe - Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
pid Process 4520 C7AA.exe - Loads dropped DLL 1 IoCs
pid Process 3092 rundll32.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3092 set thread context of 4468 3092 rundll32.exe 94 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
pid pid_target Process procid_target 204 4520 WerFault.exe 89 - Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI file.exe - Checks processor information in registry 2 TTPs 21 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\FeatureSet rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\VendorIdentifier rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Status rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier rundll32.exe Key value enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor rundll32.exe Key value enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision rundll32.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Component Information rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Update Revision rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Component Information rundll32.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Platform Specific Field 1 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Identifier rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Platform Specific Field 1 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Update Status rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz rundll32.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Internet Explorer\Toolbar Process not Found Set value (int) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\Locked = "1" Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Process not Found - Modifies registry class 30 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots rundll32.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\WorkFolders Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 50003100000000000000000010004c6f63616c003c0009000400efbe00000000000000002e00000000000000000000000000000000000000000000000000000000004c006f00630061006c00000014000000 Process not Found Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic" Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f44471a0359723fa74489c55595fe6b30ee0000 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 820074001c0043465346160031000000000000000000100041707044617461000000741a595e96dfd3488d671733bcee28bac5cdfadf9f6756418947c5c76bc0b67f400009000400efbe00000000000000002e00000000000000000000000000000000000000000000000000000000004100700070004400610074006100000042000000 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff Process not Found Set value (int) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\NodeSlot = "1" Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 4e003100000000009855f886100054656d7000003a0009000400efbe6b55586c9855fd862e0000000000000000000000000000000000000000000000000032a00201540065006d007000000014000000 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff Process not Found - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2732 Process not Found - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1600 file.exe 1600 file.exe 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found 2732 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2732 Process not Found - Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 1600 file.exe - Suspicious use of AdjustPrivilegeToken 18 IoCs
description pid Process Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found Token: SeShutdownPrivilege 2732 Process not Found Token: SeCreatePagefilePrivilege 2732 Process not Found - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4468 rundll32.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2732 Process not Found 2732 Process not Found - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2732 wrote to memory of 4520 2732 Process not Found 89 PID 2732 wrote to memory of 4520 2732 Process not Found 89 PID 2732 wrote to memory of 4520 2732 Process not Found 89 PID 4520 wrote to memory of 3092 4520 C7AA.exe 90 PID 4520 wrote to memory of 3092 4520 C7AA.exe 90 PID 4520 wrote to memory of 3092 4520 C7AA.exe 90 PID 3092 wrote to memory of 4468 3092 rundll32.exe 94 PID 3092 wrote to memory of 4468 3092 rundll32.exe 94 PID 3092 wrote to memory of 4468 3092 rundll32.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1600
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C:\Users\Admin\AppData\Local\Temp\C7AA.exeC:\Users\Admin\AppData\Local\Temp\C7AA.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4520 -
C:\Windows\SysWOW64\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp",Wuuitfqhpt2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3092 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 171333⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
PID:4468
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4520 -s 5282⤵
- Program crash
PID:204
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4520 -ip 45201⤵PID:3132
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:4892
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\C7AA.exe
- Size 1.0MB
- SHA256 dee65f997f5dcfd49db7b35a9572df2ea3b3d5df9e120d5b5d22167ae2ff52b1
- MD5 1ef17ea321b5a0ea74f4aad343470d5b
- SHA1 aca289c78355c22178be8aacd44656b495e4719d
- SHA512 f7a1d257ff27faf4acf8a5435fbfe0c8cefc540f79d5ea9d7e3388564a64e98b79cd3c7b40baaad669de68c4d5d3cd63fbca9b242568d011149a56c0a37874b2
- SSDEEP 24576:V6BN9OIOGhWl7R9F8acMfXkSn7CEWT0kIn2al1m:V6ZOpvR9F8acMfXRRQ0kIZl1m
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\C7AA.exe
- Size 1.0MB
- SHA256 dee65f997f5dcfd49db7b35a9572df2ea3b3d5df9e120d5b5d22167ae2ff52b1
- MD5 1ef17ea321b5a0ea74f4aad343470d5b
- SHA1 aca289c78355c22178be8aacd44656b495e4719d
- SHA512 f7a1d257ff27faf4acf8a5435fbfe0c8cefc540f79d5ea9d7e3388564a64e98b79cd3c7b40baaad669de68c4d5d3cd63fbca9b242568d011149a56c0a37874b2
- SSDEEP 24576:V6BN9OIOGhWl7R9F8acMfXkSn7CEWT0kIn2al1m:V6ZOpvR9F8acMfXRRQ0kIZl1m
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
- Size 730KB
- SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
- MD5 8d039a703875733043526555982e4e60
- SHA1 f583795e790e682db2feaa5f5b8d282216f581e2
- SHA512 3e89ec3eb7e90aa93c0a3cc2d120521b1c2236a8a2169b2654fcc153f926b97e85267a177ef92f3ac3a7aa493a81a3a55c1b6b56ef8f8beb93b78bf3eb10373e
- SSDEEP 12288:qs57PqFDlWFgP1t2m8eEAI20/nt/AwIV0IuvYBF7:d57yMsn2m84I2Guw9+B
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\Oyiesauffusw.tmp
- Size 730KB
- SHA256 5cb8e52b000f84494627db8e8e700e7731c9bfa2eb9e6a8a8280d2311327e81a
- MD5 8d039a703875733043526555982e4e60
- SHA1 f583795e790e682db2feaa5f5b8d282216f581e2
- SHA512 3e89ec3eb7e90aa93c0a3cc2d120521b1c2236a8a2169b2654fcc153f926b97e85267a177ef92f3ac3a7aa493a81a3a55c1b6b56ef8f8beb93b78bf3eb10373e
- SSDEEP 12288:qs57PqFDlWFgP1t2m8eEAI20/nt/AwIV0IuvYBF7:d57yMsn2m84I2Guw9+B
- MD5 SHA1 SHA512 SSDEEP