Analysis
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max time kernel
149s -
max time network
52s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
27-11-2022 16:10
Static task
static1
Behavioral task
behavioral1
Sample
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe
Resource
win10v2004-20220812-en
General
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Target
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe
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Size
301KB
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MD5
2e7cd2f7f5fbd0840bc41d4ea1bb20d2
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SHA1
2f4dda5a7818817610a2e5b74f3f4b87dba59fa6
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SHA256
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb
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SHA512
4a9a21f9c6a0381f781a0e8bccdd3e7336d40c0c0790d9764fae006964f0a554e17e2e13868fb13602f1a265d9785dc8d8479ece3fdb320d130cadf07ab98ec5
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SSDEEP
6144:PX67o2eiEsOmN+MC5+0tWHccB/kIie0K+evGPMbyJqm:CrPdN25+0t+BcC02GPwwq
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
skype.exepid process 1676 skype.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
skype.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\9975759809ee69cc2d0562054d998149 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\skype.exe\" .." skype.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9975759809ee69cc2d0562054d998149 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\skype.exe\" .." skype.exe -
Drops file in Windows directory 2 IoCs
Processes:
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exedescription ioc process File created C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\security.config.cch.new 4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe File created C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\enterprisesec.config.cch.new 4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 18 IoCs
Processes:
skype.exepid process 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe 1676 skype.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
skype.exedescription pid process Token: SeDebugPrivilege 1676 skype.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exeskype.exedescription pid process target process PID 960 wrote to memory of 1676 960 4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe skype.exe PID 960 wrote to memory of 1676 960 4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe skype.exe PID 960 wrote to memory of 1676 960 4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe skype.exe PID 1676 wrote to memory of 432 1676 skype.exe netsh.exe PID 1676 wrote to memory of 432 1676 skype.exe netsh.exe PID 1676 wrote to memory of 432 1676 skype.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe"C:\Users\Admin\AppData\Local\Temp\4de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb.exe"1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\skype.exe"C:\Users\Admin\AppData\Local\Temp\skype.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\skype.exe" "skype.exe" ENABLE3⤵
- Modifies Windows Firewall
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\skype.exeFilesize
301KB
MD52e7cd2f7f5fbd0840bc41d4ea1bb20d2
SHA12f4dda5a7818817610a2e5b74f3f4b87dba59fa6
SHA2564de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb
SHA5124a9a21f9c6a0381f781a0e8bccdd3e7336d40c0c0790d9764fae006964f0a554e17e2e13868fb13602f1a265d9785dc8d8479ece3fdb320d130cadf07ab98ec5
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C:\Users\Admin\AppData\Local\Temp\skype.exeFilesize
301KB
MD52e7cd2f7f5fbd0840bc41d4ea1bb20d2
SHA12f4dda5a7818817610a2e5b74f3f4b87dba59fa6
SHA2564de875be9247431acbc6388d427da8993843b0b89094a7825696935b875d22eb
SHA5124a9a21f9c6a0381f781a0e8bccdd3e7336d40c0c0790d9764fae006964f0a554e17e2e13868fb13602f1a265d9785dc8d8479ece3fdb320d130cadf07ab98ec5
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memory/432-64-0x0000000000000000-mapping.dmp
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memory/960-57-0x000007FEFC011000-0x000007FEFC013000-memory.dmpFilesize
8KB
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memory/960-54-0x000007FEF4650000-0x000007FEF5073000-memory.dmpFilesize
10.1MB
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memory/960-56-0x000007FEF30F0000-0x000007FEF4186000-memory.dmpFilesize
16.6MB
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memory/960-55-0x000007FEF4190000-0x000007FEF4650000-memory.dmpFilesize
4.8MB
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memory/1676-58-0x0000000000000000-mapping.dmp
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memory/1676-61-0x000007FEF4650000-0x000007FEF5073000-memory.dmpFilesize
10.1MB
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memory/1676-62-0x000007FEF4190000-0x000007FEF4650000-memory.dmpFilesize
4.8MB
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memory/1676-63-0x000007FEF30F0000-0x000007FEF4186000-memory.dmpFilesize
16.6MB
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memory/1676-66-0x00000000009F7000-0x0000000000A16000-memory.dmpFilesize
124KB
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memory/1676-67-0x00000000009F7000-0x0000000000A16000-memory.dmpFilesize
124KB