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210329-8v5z5a82en 10Analysis
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max time kernel
5s -
max time network
11s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
29-03-2021 16:32
Static task
static1
Behavioral task
behavioral1
Sample
cats.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
cats.exe
Resource
win10v20201028
General
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Target
cats.exe
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Size
126KB
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MD5
e0d108435c58dc9403588e4dcab68275
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SHA1
7a7331423938020550ff3decd2e8b50b3ee5c87a
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SHA256
61cd0131cb4bf090c5ee7761566f6f7a778e78b37d220f0506f98632a2663ee8
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SHA512
2a5648ced91b75d928b4d71a8580c5bee75a5f27623f8c5071cd23b8cd85eaa8129ddb0aaf0a1fcca05fb1b7868a0fcd9306e9ddf2d3eaaf605c41cc7fde4a9e
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:
Chrome32.exepid process 1204 Chrome32.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
cats.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" cats.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 3 IoCs
Processes:
cats.exedescription pid process target process PID 292 wrote to memory of 1204 292 cats.exe Chrome32.exe PID 292 wrote to memory of 1204 292 cats.exe Chrome32.exe PID 292 wrote to memory of 1204 292 cats.exe Chrome32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\cats.exe"C:\Users\Admin\AppData\Local\Temp\cats.exe"1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe"C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exe" C:\Users\Admin\AppData\Local\Temp\cats.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\Google (x86)\Chrome32.exeMD5
e0d108435c58dc9403588e4dcab68275
SHA17a7331423938020550ff3decd2e8b50b3ee5c87a
SHA25661cd0131cb4bf090c5ee7761566f6f7a778e78b37d220f0506f98632a2663ee8
SHA5122a5648ced91b75d928b4d71a8580c5bee75a5f27623f8c5071cd23b8cd85eaa8129ddb0aaf0a1fcca05fb1b7868a0fcd9306e9ddf2d3eaaf605c41cc7fde4a9e
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C:\Users\Admin\AppData\Local\Google (x86)\Chrome32.exeMD5
e0d108435c58dc9403588e4dcab68275
SHA17a7331423938020550ff3decd2e8b50b3ee5c87a
SHA25661cd0131cb4bf090c5ee7761566f6f7a778e78b37d220f0506f98632a2663ee8
SHA5122a5648ced91b75d928b4d71a8580c5bee75a5f27623f8c5071cd23b8cd85eaa8129ddb0aaf0a1fcca05fb1b7868a0fcd9306e9ddf2d3eaaf605c41cc7fde4a9e
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memory/292-2-0x000007FEF6460000-0x000007FEF6DFD000-memory.dmpFilesize
9.6MB
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memory/292-3-0x000007FEF6460000-0x000007FEF6DFD000-memory.dmpFilesize
9.6MB
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memory/292-4-0x0000000001EA0000-0x0000000001EA2000-memory.dmpFilesize
8KB
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memory/1204-5-0x0000000000000000-mapping.dmp
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memory/1204-8-0x0000000000A90000-0x0000000000A92000-memory.dmpFilesize
8KB
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memory/1204-9-0x000007FEF6460000-0x000007FEF6DFD000-memory.dmpFilesize
9.6MB
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memory/1204-10-0x000007FEF6460000-0x000007FEF6DFD000-memory.dmpFilesize
9.6MB