Analysis
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max time kernel
67s -
max time network
81s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-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 3320 takeown.exe 3984 icacls.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
takeown.exeicacls.exepid process 3320 takeown.exe 3984 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 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exedescription pid process target process PID 4416 wrote to memory of 3320 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 4416 wrote to memory of 3320 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 4416 wrote to memory of 3320 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe takeown.exe PID 4416 wrote to memory of 3984 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe PID 4416 wrote to memory of 3984 4416 a91ee561c823f4a04e89d90bd301b4e2abbd7f1d9c22fc8fcd4474f33f0bd85f.exe icacls.exe PID 4416 wrote to memory of 3984 4416 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
PID:4416 -
C:\Windows\SysWOW64\takeown.exeC:\Windows\system32\takeown.exe /f "c:\windows\system32\mkemr.exe"2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3320 -
C:\Windows\SysWOW64\icacls.exeC:\Windows\system32\icacls.exe "c:\windows\system32\mkemr.exe" /grant Users:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3984
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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\??\c:\windows\SysWOW64\mkemr.exeFilesize
23KB
MD5bb662492c62a73b7d52fe31a2859a34a
SHA168692c13d9ca1fc2f869eb8b451fa085e2629630
SHA256e6516034b5d0c96d61ef94db4cfc61d86793d0c203d6310fec2de42a752bb01d
SHA512919982233f2f8d76c356d9c7e4451231dfc6ebdea73a2387748d9bff29371411b69c9b7cc8fc9195754b53e3f4218ec59400c28a1d1b7744533a641b8dc516a8
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memory/3320-134-0x0000000000000000-mapping.dmp
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memory/3984-135-0x0000000000000000-mapping.dmp