Analysis
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max time kernel
100s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
02-10-2022 10:09
Static task
static1
Behavioral task
behavioral1
Sample
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe
Resource
win10v2004-20220901-en
General
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Target
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe
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Size
40KB
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MD5
638b381cde37f3f633f4fe0efeb97691
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SHA1
30623b22167fae3e1f7bef8de83ef67a2c685cbb
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SHA256
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f
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SHA512
c072f033cddddd9e02932cb116828b4062c5fc9b702cc3e9f1ade2b0ecd95258e1e100d1ca4ae7633d8298c67bbc284c73a0d749c036034c2488fb356ecfbd0b
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SSDEEP
768:/q5uNaY7HHG8wCVk9dhhMep41ZLLBV/UE:/q5h4Hkh2BVcE
Malware Config
Signatures
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Possible privilege escalation attempt 2 IoCs
Processes:
takeown.exeicacls.exepid process 5092 takeown.exe 4540 icacls.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
takeown.exeicacls.exepid process 5092 takeown.exe 4540 icacls.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exedescription ioc process Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\KTMS = "C:\\Windows\\system32\\krce.exe" 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe -
Drops file in System32 directory 2 IoCs
Processes:
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exedescription ioc process File created C:\Windows\SysWOW64\krce.exe 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe File opened for modification C:\Windows\SysWOW64\krce.exe 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe -
Processes:
regini.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Main regini.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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-1-5-21-929662420-1054238289-2961194603-1000\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:
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exepid process 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exedescription pid process target process PID 4180 wrote to memory of 5092 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe takeown.exe PID 4180 wrote to memory of 5092 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe takeown.exe PID 4180 wrote to memory of 5092 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe takeown.exe PID 4180 wrote to memory of 4540 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe icacls.exe PID 4180 wrote to memory of 4540 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe icacls.exe PID 4180 wrote to memory of 4540 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe icacls.exe PID 4180 wrote to memory of 4632 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe regini.exe PID 4180 wrote to memory of 4632 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe regini.exe PID 4180 wrote to memory of 4632 4180 40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe regini.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe"C:\Users\Admin\AppData\Local\Temp\40b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f.exe"1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\takeown.exeC:\Windows\system32\takeown.exe /f "C:\Windows\system32\krce.exe"2⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\SysWOW64\icacls.exeC:\Windows\system32\icacls.exe "C:\Windows\system32\krce.exe" /grant Users:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\SysWOW64\regini.exeC:\Windows\system32\\regini.exe "C:\Users\Admin\AppData\Local\Temp\MUQJRzH.ini"2⤵
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\MUQJRzH.iniFilesize
633B
MD5307edf4a3258717302e3d2ba7865ec69
SHA1faa9b10078b3ee200bea0cb2645157843a8e4908
SHA256bc4f3fa5dc6d89b482f4f09363cf82b6c6500b853b4d5fe3c589c4dc6601bf9a
SHA512dfaa7e643e0c477701cce3de1aba8d506a1063d72547d760bcc76c274dd9069ad6529dfe341ff4202a8d50aabaa712db4c76928cc455fefb3f1601cf85558715
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C:\Windows\SysWOW64\krce.exeFilesize
40KB
MD5638b381cde37f3f633f4fe0efeb97691
SHA130623b22167fae3e1f7bef8de83ef67a2c685cbb
SHA25640b9a0d07a122dff54576a26ea3833bf532f93a8404942a6b32e6cc2e240594f
SHA512c072f033cddddd9e02932cb116828b4062c5fc9b702cc3e9f1ade2b0ecd95258e1e100d1ca4ae7633d8298c67bbc284c73a0d749c036034c2488fb356ecfbd0b
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memory/4540-135-0x0000000000000000-mapping.dmp
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memory/4632-137-0x0000000000000000-mapping.dmp
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memory/5092-134-0x0000000000000000-mapping.dmp