Analysis
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max time kernel
131s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
20-05-2022 21:56
Behavioral task
behavioral1
Sample
4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe
Resource
win7-20220414-en
General
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Target
4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe
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Size
142KB
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MD5
3f77e8af75b455f40cfa74908ae8bac3
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SHA1
80d2eec53813a6c8017634b11ac6719fa7884aad
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SHA256
4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49
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SHA512
ecff89cd29a8e6c927b89ef81d8f5fcd2c9f65320d54816076628f11bf9e68c14794b01f0cebc312ebba2506fcf4b26d12ade32f8e15818fbae603f507f96fb9
Malware Config
Signatures
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Drops file in System32 directory 4 IoCs
Processes:
portalscrn.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 portalscrn.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE portalscrn.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies portalscrn.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 portalscrn.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies data under HKEY_USERS 3 IoCs
Processes:
portalscrn.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" portalscrn.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" portalscrn.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix portalscrn.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
Processes:
portalscrn.exepid process 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe 400 portalscrn.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exepid process 3460 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exeportalscrn.exedescription pid process target process PID 916 wrote to memory of 3460 916 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe PID 916 wrote to memory of 3460 916 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe PID 916 wrote to memory of 3460 916 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe 4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe PID 1020 wrote to memory of 400 1020 portalscrn.exe portalscrn.exe PID 1020 wrote to memory of 400 1020 portalscrn.exe portalscrn.exe PID 1020 wrote to memory of 400 1020 portalscrn.exe portalscrn.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe"C:\Users\Admin\AppData\Local\Temp\4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4495447ebb434423103b2da44c41c3138a491eb0c3e5c68b33cf362c0a54aa49.exe--ba2221582⤵
- Suspicious behavior: RenamesItself
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C:\Windows\SysWOW64\portalscrn.exe"C:\Windows\SysWOW64\portalscrn.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\portalscrn.exe--4201290a2⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/400-135-0x0000000000000000-mapping.dmp
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memory/400-136-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/916-131-0x0000000002030000-0x0000000002041000-memory.dmpFilesize
68KB
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memory/916-132-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
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memory/3460-130-0x0000000000000000-mapping.dmp
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memory/3460-133-0x0000000000590000-0x00000000005A1000-memory.dmpFilesize
68KB
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memory/3460-134-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB