Analysis
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max time kernel
91s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
29-10-2022 00:12
Static task
static1
Behavioral task
behavioral1
Sample
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe
Resource
win10v2004-20220901-en
General
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Target
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe
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Size
52KB
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MD5
02c441297075ab5ef52b0ff01cd41a86
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SHA1
e6f649ee6c0c1641276cb7cbc19e7575d93edb37
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SHA256
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8
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SHA512
47dc5cacca476425f2d4dfef2bcc0f27b225a7b093fc9ac5e6b8b99b6122b223a58b5e48ac359d9d05dcb6c4105b5b28ea0a161582ae642fc0a1ee6ae6d05462
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SSDEEP
768:N1Xq5eM+0UXmx327Swo0NTuF2pgfuDeeg93Kk1TG2ocRsIEUj:NckB0UQGbcPfQiKEHlKUj
Malware Config
Signatures
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Possible privilege escalation attempt 2 IoCs
Processes:
takeown.exeicacls.exepid process 796 takeown.exe 944 icacls.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
takeown.exeicacls.exepid process 796 takeown.exe 944 icacls.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exedescription ioc process Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WYHOYu = "c:\\windows\\system32\\wtkj.exe" b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe -
Drops file in System32 directory 2 IoCs
Processes:
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exedescription ioc process File created \??\c:\windows\SysWOW64\wtkj.exe b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe File opened for modification \??\c:\windows\SysWOW64\wtkj.exe b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exepid process 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exedescription pid process target process PID 1344 wrote to memory of 796 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe takeown.exe PID 1344 wrote to memory of 796 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe takeown.exe PID 1344 wrote to memory of 796 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe takeown.exe PID 1344 wrote to memory of 944 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe icacls.exe PID 1344 wrote to memory of 944 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe icacls.exe PID 1344 wrote to memory of 944 1344 b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe icacls.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.exe"C:\Users\Admin\AppData\Local\Temp\b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8.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\wtkj.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\wtkj.exe" /grant Users:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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\??\c:\windows\SysWOW64\wtkj.exeFilesize
52KB
MD502c441297075ab5ef52b0ff01cd41a86
SHA1e6f649ee6c0c1641276cb7cbc19e7575d93edb37
SHA256b63e6dd37cb7379a3955b0e8c9437b0c233dc89364da701b0686746e981bf8d8
SHA51247dc5cacca476425f2d4dfef2bcc0f27b225a7b093fc9ac5e6b8b99b6122b223a58b5e48ac359d9d05dcb6c4105b5b28ea0a161582ae642fc0a1ee6ae6d05462
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memory/796-134-0x0000000000000000-mapping.dmp
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memory/944-135-0x0000000000000000-mapping.dmp