Analysis
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max time kernel
142s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
20-11-2022 07:54
Static task
static1
Behavioral task
behavioral1
Sample
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe
Resource
win10v2004-20220812-en
General
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Target
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe
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Size
40KB
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MD5
1b20fe5b213d3bbfe6da750f334abee1
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SHA1
daa7690c7c63b1c8f653c2df3c09e901568a92ad
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SHA256
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529
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SHA512
29d5c9698aab9f1cfffb0b5a19e1cdd968b08e5538d918e0c8bc61f7f1b2592111096ba8bc2ee71d3c7c32c08e3a88f5d80c488ee3197825ef8242d8608c0096
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SSDEEP
768:/8g7pNf+yHOPz5zlcVu8xqUOR+DhFuraJNfF5mbExE1u0kK2PrxBryo2qG5:/NduPzIXqUOR+1FuraJNfF5mbEWI0kKt
Malware Config
Signatures
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Possible privilege escalation attempt 2 IoCs
Processes:
icacls.exetakeown.exepid process 4976 icacls.exe 4496 takeown.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
takeown.exeicacls.exepid process 4496 takeown.exe 4976 icacls.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Epl = "C:\\Windows\\system32\\lebbu.exe" a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe -
Drops file in System32 directory 2 IoCs
Processes:
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exedescription ioc process File created C:\Windows\SysWOW64\lebbu.exe a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe File opened for modification C:\Windows\SysWOW64\lebbu.exe a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe -
Processes:
regini.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main regini.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Default_Page_URL = "http://www.zhuangxiu008.com/" regini.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Main regini.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Default_Page_URL = "http://www.zhuangxiu008.com/" regini.exe -
Modifies Internet Explorer start page 1 TTPs 2 IoCs
Processes:
regini.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page = "http://www.zhuangxiu008.com/" regini.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Start Page = "http://www.zhuangxiu008.com/" regini.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exepid process 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exedescription pid process target process PID 4176 wrote to memory of 4496 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe takeown.exe PID 4176 wrote to memory of 4496 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe takeown.exe PID 4176 wrote to memory of 4496 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe takeown.exe PID 4176 wrote to memory of 4976 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe icacls.exe PID 4176 wrote to memory of 4976 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe icacls.exe PID 4176 wrote to memory of 4976 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe icacls.exe PID 4176 wrote to memory of 3236 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe regini.exe PID 4176 wrote to memory of 3236 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe regini.exe PID 4176 wrote to memory of 3236 4176 a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe regini.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe"C:\Users\Admin\AppData\Local\Temp\a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529.exe"1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4176 -
C:\Windows\SysWOW64\takeown.exeC:\Windows\system32\takeown.exe /f "C:\Windows\system32\lebbu.exe"2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:4496 -
C:\Windows\SysWOW64\icacls.exeC:\Windows\system32\icacls.exe "C:\Windows\system32\lebbu.exe" /grant Users:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:4976 -
C:\Windows\SysWOW64\regini.exeC:\Windows\system32\\regini.exe "C:\Users\Admin\AppData\Local\Temp\TMwUOE.ini"2⤵
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
PID:3236
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\TMwUOE.iniFilesize
633B
MD5307edf4a3258717302e3d2ba7865ec69
SHA1faa9b10078b3ee200bea0cb2645157843a8e4908
SHA256bc4f3fa5dc6d89b482f4f09363cf82b6c6500b853b4d5fe3c589c4dc6601bf9a
SHA512dfaa7e643e0c477701cce3de1aba8d506a1063d72547d760bcc76c274dd9069ad6529dfe341ff4202a8d50aabaa712db4c76928cc455fefb3f1601cf85558715
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C:\Windows\SysWOW64\lebbu.exeFilesize
40KB
MD51b20fe5b213d3bbfe6da750f334abee1
SHA1daa7690c7c63b1c8f653c2df3c09e901568a92ad
SHA256a87678e44b0d9290cd685fb75a270192b1bcb2179e02b52b0f34b193256e2529
SHA51229d5c9698aab9f1cfffb0b5a19e1cdd968b08e5538d918e0c8bc61f7f1b2592111096ba8bc2ee71d3c7c32c08e3a88f5d80c488ee3197825ef8242d8608c0096
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memory/3236-137-0x0000000000000000-mapping.dmp
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memory/4496-134-0x0000000000000000-mapping.dmp
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memory/4976-135-0x0000000000000000-mapping.dmp