Analysis
- max time kernel
150s - max time network
137s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system - submitted
06/01/2023, 01:41
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20221111-en
windows7-x64
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
21 signatures
150 seconds
General
- Target file.exe
- Size 214KB
- Sample230106-b339haea22
- SHA256 0eb58f70c335baeddb9fda987a0e2b018fb744d204effb95fa4280e0c1ae04da
- MD5 ea590281584237c6acb83dff396772cf
- SHA1 e9d65b899a82a0ef48174c6b5ae2c347ad6a8862
- SHA512 bb13fcdfaba1074da5f52b359ac6b8488893da3531b02a6f608ee5c04fcc0b95da8225e4a84ca9a215e1fe361ed2460eb14bc0e797c1f3ddadedbcde623bc901
- SSDEEP 3072:D9Xh7IJH3SLaSPp2hTAa+5qyPfz48Zy1Wk6EytnMNThUhQ5NvN:D59La7hTAaA88IQMkGThWQ53
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
resource yara_rule behavioral2/memory/720-133-0x00000000048D0000-0x00000000048D9000-memory.dmp family_smokeloader - SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 2 IoCs
flow pid Process 46 3640 rundll32.exe 48 3640 rundll32.exe - Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
pid Process 4388 E091.exe - Loads dropped DLL 2 IoCs
pid Process 3640 rundll32.exe 3640 rundll32.exe - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3640 set thread context of 2408 3640 rundll32.exe 92 - 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 3100 4388 WerFault.exe 87 - 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 20 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Previous Update Revision rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\VendorIdentifier rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\ProcessorNameString rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Component Information rundll32.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\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\1\Update Status rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet 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 opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Configuration Data rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1\Configuration Data rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe Key value enumerated \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\1 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\Identifier rundll32.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Internet Explorer\Toolbar Process not Found Set value (int) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\Locked = "1" Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Process not Found - Modifies registry class 30 IoCs
description ioc Process Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 Process not Found Set value (int) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\NodeSlot = "1" Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 820074001c0043465346160031000000000000000000100041707044617461000000741a595e96dfd3488d671733bcee28bac5cdfadf9f6756418947c5c76bc0b67f400009000400efbe00000000000000002e00000000000000000000000000000000000000000000000000000000004100700070004400610074006100000042000000 Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 Process not Found Set value (str) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic" Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU rundll32.exe Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 4e0031000000000026564f15100054656d7000003a0009000400efbe6b558a6c265654152e0000000000000000000000000000000000000000000000000047b6d800540065006d007000000014000000 Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\WorkFolders Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f44471a0359723fa74489c55595fe6b30ee0000 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = ffffffff Process not Found Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ Process not Found Key created \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 Process not Found Set value (data) \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 50003100000000000000000010004c6f63616c003c0009000400efbe00000000000000002e00000000000000000000000000000000000000000000000000000000004c006f00630061006c00000014000000 Process not Found - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2888 Process not Found - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 720 file.exe 720 file.exe 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found 2888 Process not Found - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2888 Process not Found - Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 720 file.exe - Suspicious use of AdjustPrivilegeToken 20 IoCs
description pid Process Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found Token: SeShutdownPrivilege 2888 Process not Found Token: SeCreatePagefilePrivilege 2888 Process not Found - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 2408 rundll32.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2888 Process not Found 2888 Process not Found - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2888 wrote to memory of 4388 2888 Process not Found 87 PID 2888 wrote to memory of 4388 2888 Process not Found 87 PID 2888 wrote to memory of 4388 2888 Process not Found 87 PID 4388 wrote to memory of 3640 4388 E091.exe 88 PID 4388 wrote to memory of 3640 4388 E091.exe 88 PID 4388 wrote to memory of 3640 4388 E091.exe 88 PID 3640 wrote to memory of 2408 3640 rundll32.exe 92 PID 3640 wrote to memory of 2408 3640 rundll32.exe 92 PID 3640 wrote to memory of 2408 3640 rundll32.exe 92
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:720
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C:\Users\Admin\AppData\Local\Temp\E091.exeC:\Users\Admin\AppData\Local\Temp\E091.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4388 -
C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Rewurtuihyfrtty.dll,start2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3640 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 140983⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
PID:2408
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4388 -s 5122⤵
- Program crash
PID:3100
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4388 -ip 43881⤵PID:1532
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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:4068
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\E091.exe
- Size 3.7MB
- SHA256 045d257fff1a2678715e67b6ce278456bd264514598fd51a3fc8023d58f64c3a
- MD5 065605a957e201919c4627b7c8a97e46
- SHA1 c1a3ad417de6d479702697a6a481b23240fe0e09
- SHA512 ba9b295d9c8179b004c2187687915f5514b64138dab0a1d441c42f6b5afa7e955ff0f5d1150883c27e969c1df58957db29a1ce5114d0edbff0e95130858adffd
- SSDEEP 98304:/HtvWtYBbH/zJLqR0FU8UTi74npUUiX0wY0JXu:VOt4b9/UC7K60d0JX
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\E091.exe
- Size 3.7MB
- SHA256 045d257fff1a2678715e67b6ce278456bd264514598fd51a3fc8023d58f64c3a
- MD5 065605a957e201919c4627b7c8a97e46
- SHA1 c1a3ad417de6d479702697a6a481b23240fe0e09
- SHA512 ba9b295d9c8179b004c2187687915f5514b64138dab0a1d441c42f6b5afa7e955ff0f5d1150883c27e969c1df58957db29a1ce5114d0edbff0e95130858adffd
- SSDEEP 98304:/HtvWtYBbH/zJLqR0FU8UTi74npUUiX0wY0JXu:VOt4b9/UC7K60d0JX
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\Rewurtuihyfrtty.dll
- Size 4.3MB
- SHA256 218bb734197f42be3a1cc6959510a364ce92e954e3c4b0485751ee65a6929d1f
- MD5 ea62adb4cee6197a9401b2c705c5f40a
- SHA1 9d7aee9d5f2069764e6b5cb60c46ea8ee45d16a7
- SHA512 c7ff293be7151b7ec7d329603e1c2bb9cce195d2ecb26ba4c5aa1cf05eab435e280849ebf74d5954e5cb6384efa97291fa6b8fb989a97ba85351be31d29c2c1d
- SSDEEP 98304:T63L9jVJuX+VgOggbMs53ZCIZmn3VhyA:T6L1mOZMs53Zp03VEA
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\Rewurtuihyfrtty.dll
- Size 4.3MB
- SHA256 218bb734197f42be3a1cc6959510a364ce92e954e3c4b0485751ee65a6929d1f
- MD5 ea62adb4cee6197a9401b2c705c5f40a
- SHA1 9d7aee9d5f2069764e6b5cb60c46ea8ee45d16a7
- SHA512 c7ff293be7151b7ec7d329603e1c2bb9cce195d2ecb26ba4c5aa1cf05eab435e280849ebf74d5954e5cb6384efa97291fa6b8fb989a97ba85351be31d29c2c1d
- SSDEEP 98304:T63L9jVJuX+VgOggbMs53ZCIZmn3VhyA:T6L1mOZMs53Zp03VEA
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\Rewurtuihyfrtty.dll
- Size 4.3MB
- SHA256 218bb734197f42be3a1cc6959510a364ce92e954e3c4b0485751ee65a6929d1f
- MD5 ea62adb4cee6197a9401b2c705c5f40a
- SHA1 9d7aee9d5f2069764e6b5cb60c46ea8ee45d16a7
- SHA512 c7ff293be7151b7ec7d329603e1c2bb9cce195d2ecb26ba4c5aa1cf05eab435e280849ebf74d5954e5cb6384efa97291fa6b8fb989a97ba85351be31d29c2c1d
- SSDEEP 98304:T63L9jVJuX+VgOggbMs53ZCIZmn3VhyA:T6L1mOZMs53Zp03VEA
- MD5 SHA1 SHA512 SSDEEP