Analysis
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max time kernel
8s -
max time network
47s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
29-10-2022 00:16
Static task
static1
Behavioral task
behavioral1
Sample
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
Resource
win10v2004-20220812-en
General
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Target
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe
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Size
52KB
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MD5
0ab5a0cab786688729462c7f947041e1
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SHA1
3efa45beba70450f97ac66deb6c4cdecaefbbd36
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SHA256
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f
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SHA512
220e02eab8a854cc6fb6e3f41c66c21fa937078a32029174e662345e661ecf091a85f9a170119e3b5c3d134021bba9889d7bc77059fdc050f47632c8940a2a5f
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SSDEEP
768:ZBexmBBSvNF0Kkn1TLaPC1XSlsiTCHpySXckZzXvakTkEqUNOrQQ8w59gCb5g/UT:XamBAvlknV24TrCkTkQNOCJUD
Malware Config
Signatures
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Possible privilege escalation attempt 2 IoCs
Processes:
takeown.exeicacls.exepid process 2044 takeown.exe 944 icacls.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
takeown.exeicacls.exepid process 2044 takeown.exe 944 icacls.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exedescription ioc process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\MdFU = "c:\\windows\\system32\\mkemr.exe" a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe -
Drops file in System32 directory 2 IoCs
Processes:
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exedescription ioc process File created \??\c:\windows\SysWOW64\mkemr.exe a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe File opened for modification \??\c:\windows\SysWOW64\mkemr.exe a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exepid process 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exedescription pid process target process PID 1520 wrote to memory of 2044 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 1520 wrote to memory of 2044 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 1520 wrote to memory of 2044 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 1520 wrote to memory of 2044 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 1520 wrote to memory of 944 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe PID 1520 wrote to memory of 944 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe PID 1520 wrote to memory of 944 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe PID 1520 wrote to memory of 944 1520 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe"C:\Users\Admin\AppData\Local\Temp\a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.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\mkemr.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\mkemr.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\mkemr.exeFilesize
21KB
MD53207672c816972bba833909c93b3a316
SHA1251fd4f6f1d240f94f063031f37e49f40610d7d0
SHA2560dd85a29b10e14adfe3a0f203e9f7607be85332838993532e46216a9414a4543
SHA51253749b01c170c0fc6f6e04fce3758f215eada8225d2cc51fc9db80257912d501993f8d14362bcb3e829d0f18dc56b57e8b3dbe7aafb6d88131e56704e12b4cdb
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memory/944-57-0x0000000000000000-mapping.dmp
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memory/2044-56-0x0000000000000000-mapping.dmp