Resubmissions
09-10-2023 22:48
231009-2rg51aah99 1029-01-2023 17:35
230129-v55pwsha8v 1030-11-2022 18:03
221130-wm9rkafc81 10Analysis
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max time kernel
389s -
max time network
388s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
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submitted
29-01-2023 17:35
General
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Target
3efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467.exe
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Size
2.4MB
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MD5
c2c5848ec8ae11e84d42521c527f75ca
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SHA1
d8d98dff64297d4cf8a227a2c138efc4774942b2
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SHA256
3efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467
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SHA512
10e3f210c2d98c090ce3a65be2ff70279c07c1bf3dcb06a48dbfaa34ab6471ed0e8f2a35fbf5bd0c9b61b1c55493c5042daa32556b4b28e22c28e8d80c5d0846
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SSDEEP
49152:3rKiRwG7r2ie/XMK+kLg7SdqnCvIUdJi0l2Css5qq2nY4/gX1aNnUm5vL:3RXK+b7ScCvFPx3Kr48UmN
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
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Modifies extensions of user files 7 IoCs
Ransomware generally changes the extension on encrypted files.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Adds Run key to start application 2 TTPs 1 IoCs
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Suspicious use of NtSetInformationThreadHideFromDebugger 40 IoCs
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Drops file in Program Files directory 64 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of FindShellTrayWindow 64 IoCs
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Suspicious use of SendNotifyMessage 64 IoCs
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Suspicious use of SetWindowsHookEx 2 IoCs
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Suspicious use of WriteProcessMemory 3 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\3efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467.exe"C:\Users\Admin\AppData\Local\Temp\3efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
- 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\3efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467.exe2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Checks processor information in registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Drpbx\drpbx.exeFilesize
2.4MB
MD5c2c5848ec8ae11e84d42521c527f75ca
SHA1d8d98dff64297d4cf8a227a2c138efc4774942b2
SHA2563efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467
SHA51210e3f210c2d98c090ce3a65be2ff70279c07c1bf3dcb06a48dbfaa34ab6471ed0e8f2a35fbf5bd0c9b61b1c55493c5042daa32556b4b28e22c28e8d80c5d0846
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C:\Users\Admin\AppData\Local\Drpbx\drpbx.exeFilesize
2.4MB
MD5c2c5848ec8ae11e84d42521c527f75ca
SHA1d8d98dff64297d4cf8a227a2c138efc4774942b2
SHA2563efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467
SHA51210e3f210c2d98c090ce3a65be2ff70279c07c1bf3dcb06a48dbfaa34ab6471ed0e8f2a35fbf5bd0c9b61b1c55493c5042daa32556b4b28e22c28e8d80c5d0846
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C:\Users\Admin\AppData\Roaming\Frfx\firefox.exeFilesize
2.4MB
MD5c2c5848ec8ae11e84d42521c527f75ca
SHA1d8d98dff64297d4cf8a227a2c138efc4774942b2
SHA2563efc575b6cfd36e57a7b244a860160a35e76c0945bdad1bd79294a1816887467
SHA51210e3f210c2d98c090ce3a65be2ff70279c07c1bf3dcb06a48dbfaa34ab6471ed0e8f2a35fbf5bd0c9b61b1c55493c5042daa32556b4b28e22c28e8d80c5d0846
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memory/3876-141-0x0000000000880000-0x0000000000882000-memory.dmpFilesize
8KB
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memory/3876-143-0x00000000FEBC0000-0x00000000FEF91000-memory.dmpFilesize
3.8MB
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memory/3876-148-0x0000000074AC0000-0x0000000075071000-memory.dmpFilesize
5.7MB
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memory/3876-147-0x0000000000880000-0x000000000123C000-memory.dmpFilesize
9.7MB
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memory/3876-136-0x0000000000000000-mapping.dmp
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memory/3876-145-0x0000000074AC0000-0x0000000075071000-memory.dmpFilesize
5.7MB
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memory/3876-144-0x0000000000880000-0x000000000123C000-memory.dmpFilesize
9.7MB
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memory/4536-139-0x0000000000EC0000-0x000000000187C000-memory.dmpFilesize
9.7MB
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memory/4536-140-0x00000000FEDE0000-0x00000000FF1B1000-memory.dmpFilesize
3.8MB
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memory/4536-142-0x0000000074AC0000-0x0000000075071000-memory.dmpFilesize
5.7MB
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memory/4536-132-0x0000000000EC0000-0x000000000187C000-memory.dmpFilesize
9.7MB
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memory/4536-133-0x00000000FEDE0000-0x00000000FF1B1000-memory.dmpFilesize
3.8MB
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memory/4536-134-0x0000000000EC0000-0x0000000000EC2000-memory.dmpFilesize
8KB
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memory/4536-135-0x0000000074AC0000-0x0000000075071000-memory.dmpFilesize
5.7MB