Analysis
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max time kernel
13s -
max time network
111s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
12-02-2021 09:25
Static task
static1
Behavioral task
behavioral1
Sample
Compito matematica.pdf.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
Compito matematica.pdf.exe
Resource
win10v20201028
General
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Target
Compito matematica.pdf.exe
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Size
606KB
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MD5
4e890ba5a4f6fd63727c0005daa654dd
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SHA1
e9ade30c93942c3f5928522552dd01eb25a9e9db
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SHA256
e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51
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SHA512
177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477
Malware Config
Signatures
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Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
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Executes dropped EXE 1 IoCs
Processes:
drpbx.exepid process 2732 drpbx.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Compito matematica.pdf.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" Compito matematica.pdf.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of WriteProcessMemory 2 IoCs
Processes:
Compito matematica.pdf.exedescription pid process target process PID 796 wrote to memory of 2732 796 Compito matematica.pdf.exe drpbx.exe PID 796 wrote to memory of 2732 796 Compito matematica.pdf.exe drpbx.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Compito matematica.pdf.exe"1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\Compito?matematica.pdf.exe2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Drpbx\drpbx.exeMD5
4e890ba5a4f6fd63727c0005daa654dd
SHA1e9ade30c93942c3f5928522552dd01eb25a9e9db
SHA256e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51
SHA512177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477
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C:\Users\Admin\AppData\Local\Drpbx\drpbx.exeMD5
4e890ba5a4f6fd63727c0005daa654dd
SHA1e9ade30c93942c3f5928522552dd01eb25a9e9db
SHA256e1c7d34fc0138d018f9e947af3dac7ec4d0fe9751dd1bc4424b185a92ca4bc51
SHA512177badec70b21ed1b94a8a235535249c94b72e21fc62bae1e8c32e44b9495006687a2ef7545256ddaa2c167d870515de45e9aea524e3081135fa901532af6477
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memory/796-3-0x0000000002380000-0x0000000002382000-memory.dmpFilesize
8KB
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memory/796-2-0x00007FF99FCC0000-0x00007FF9A0660000-memory.dmpFilesize
9.6MB
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memory/2732-4-0x0000000000000000-mapping.dmp
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memory/2732-7-0x00007FF99FCC0000-0x00007FF9A0660000-memory.dmpFilesize
9.6MB
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memory/2732-8-0x00000000024E0000-0x00000000024E2000-memory.dmpFilesize
8KB