Analysis
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max time kernel
124s -
max time network
124s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
23-03-2021 19:28
Behavioral task
behavioral1
Sample
fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe
Resource
win10v20201028
General
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Target
fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe
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Size
1.9MB
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MD5
9fa1ba3e7d6e32f240c790753cdaaf8e
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SHA1
7bcea3fbfcb4c170c57c9050499e1fae40f5d731
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SHA256
fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87
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SHA512
8d2fb58cb8776ead15f445671431eae13a00b48921e545c7ecbf91829015d818d663d9369f181de669ebb771b113c2f675c3a156fac5ede019b5fad9cb8c65fe
Malware Config
Extracted
C:\HOW-TO-DECRYPT-gn9cj.txt
Signatures
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Processes:
resource yara_rule C:\Users\Admin\AppData\Roaming\MsimeReceiver\Method cryptone C:\Users\Admin\AppData\Roaming\MsimeReceiver\Method cryptone -
Executes dropped EXE 1 IoCs
Processes:
Methodpid process 4188 Method -
Modifies extensions of user files 22 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
Methoddescription ioc process File opened for modification C:\Users\Admin\Pictures\StartResume.tiff.gn9cj Method File opened for modification C:\Users\Admin\Pictures\InstallRestart.tiff.gn9cj Method File renamed C:\Users\Admin\Pictures\RemoveRegister.raw => C:\Users\Admin\Pictures\RemoveRegister.raw.gn9cj Method File renamed C:\Users\Admin\Pictures\ShowOut.png => C:\Users\Admin\Pictures\ShowOut.png.gn9cj Method File opened for modification C:\Users\Admin\Pictures\ConnectRestart.crw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\MeasureUpdate.crw.gn9cj Method File renamed C:\Users\Admin\Pictures\BlockRevoke.crw => C:\Users\Admin\Pictures\BlockRevoke.crw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\BlockRevoke.crw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\CompressUndo.png.gn9cj Method File renamed C:\Users\Admin\Pictures\StartResume.tiff => C:\Users\Admin\Pictures\StartResume.tiff.gn9cj Method File renamed C:\Users\Admin\Pictures\CompressUndo.png => C:\Users\Admin\Pictures\CompressUndo.png.gn9cj Method File renamed C:\Users\Admin\Pictures\ProtectWrite.png => C:\Users\Admin\Pictures\ProtectWrite.png.gn9cj Method File opened for modification C:\Users\Admin\Pictures\ProtectWrite.png.gn9cj Method File opened for modification C:\Users\Admin\Pictures\LimitSwitch.raw.gn9cj Method File renamed C:\Users\Admin\Pictures\MeasureUpdate.crw => C:\Users\Admin\Pictures\MeasureUpdate.crw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\RemoveRegister.raw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\ShowOut.png.gn9cj Method File renamed C:\Users\Admin\Pictures\SuspendProtect.tif => C:\Users\Admin\Pictures\SuspendProtect.tif.gn9cj Method File renamed C:\Users\Admin\Pictures\ConnectRestart.crw => C:\Users\Admin\Pictures\ConnectRestart.crw.gn9cj Method File renamed C:\Users\Admin\Pictures\InstallRestart.tiff => C:\Users\Admin\Pictures\InstallRestart.tiff.gn9cj Method File renamed C:\Users\Admin\Pictures\LimitSwitch.raw => C:\Users\Admin\Pictures\LimitSwitch.raw.gn9cj Method File opened for modification C:\Users\Admin\Pictures\SuspendProtect.tif.gn9cj Method -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exeMethodcmd.execmd.exedescription pid process target process PID 4648 wrote to memory of 4188 4648 fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe Method PID 4648 wrote to memory of 4188 4648 fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe Method PID 4188 wrote to memory of 1880 4188 Method cmd.exe PID 4188 wrote to memory of 1880 4188 Method cmd.exe PID 4648 wrote to memory of 3372 4648 fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe cmd.exe PID 4648 wrote to memory of 3372 4648 fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe cmd.exe PID 1880 wrote to memory of 4304 1880 cmd.exe waitfor.exe PID 1880 wrote to memory of 4304 1880 cmd.exe waitfor.exe PID 3372 wrote to memory of 4284 3372 cmd.exe waitfor.exe PID 3372 wrote to memory of 4284 3372 cmd.exe waitfor.exe PID 1880 wrote to memory of 3848 1880 cmd.exe attrib.exe PID 1880 wrote to memory of 3848 1880 cmd.exe attrib.exe PID 3372 wrote to memory of 3496 3372 cmd.exe attrib.exe PID 3372 wrote to memory of 3496 3372 cmd.exe attrib.exe -
Views/modifies file attributes 1 TTPs 2 IoCs
Processes:
attrib.exeattrib.exepid process 3848 attrib.exe 3496 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe"C:\Users\Admin\AppData\Local\Temp\fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\MsimeReceiver\MethodC:\Users\Admin\AppData\Roaming\MsimeReceiver\Method /go2⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\cmd.execmd /c waitfor /t 10 pause /d y & attrib -h "C:\Users\Admin\AppData\Roaming\MsimeReceiver\Method" & del "C:\Users\Admin\AppData\Roaming\MsimeReceiver\Method" & rd "C:\Users\Admin\AppData\Roaming\MsimeReceiver\"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\waitfor.exewaitfor /t 10 pause /d y4⤵
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C:\Windows\system32\attrib.exeattrib -h "C:\Users\Admin\AppData\Roaming\MsimeReceiver\Method"4⤵
- Views/modifies file attributes
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C:\Windows\SYSTEM32\cmd.execmd /c waitfor /t 10 pause /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe" & del "C:\Users\Admin\AppData\Local\Temp\fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe" & rd "C:\Users\Admin\AppData\Local\Temp\"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\waitfor.exewaitfor /t 10 pause /d y3⤵
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C:\Windows\system32\attrib.exeattrib -h "C:\Users\Admin\AppData\Local\Temp\fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87.exe"3⤵
- Views/modifies file attributes
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Roaming\MsimeReceiver\MethodMD5
9fa1ba3e7d6e32f240c790753cdaaf8e
SHA17bcea3fbfcb4c170c57c9050499e1fae40f5d731
SHA256fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87
SHA5128d2fb58cb8776ead15f445671431eae13a00b48921e545c7ecbf91829015d818d663d9369f181de669ebb771b113c2f675c3a156fac5ede019b5fad9cb8c65fe
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C:\Users\Admin\AppData\Roaming\MsimeReceiver\MethodMD5
9fa1ba3e7d6e32f240c790753cdaaf8e
SHA17bcea3fbfcb4c170c57c9050499e1fae40f5d731
SHA256fe997a590a68d98f95ac0b6c994ba69c3b2ece9841277b7fecd9dfaa6f589a87
SHA5128d2fb58cb8776ead15f445671431eae13a00b48921e545c7ecbf91829015d818d663d9369f181de669ebb771b113c2f675c3a156fac5ede019b5fad9cb8c65fe
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memory/1880-7-0x0000000000000000-mapping.dmp
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memory/3372-8-0x0000000000000000-mapping.dmp
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memory/3496-12-0x0000000000000000-mapping.dmp
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memory/3848-11-0x0000000000000000-mapping.dmp
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memory/4188-3-0x0000000000000000-mapping.dmp
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memory/4284-10-0x0000000000000000-mapping.dmp
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memory/4304-9-0x0000000000000000-mapping.dmp
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memory/4648-2-0x0000000001F00000-0x00000000020C2000-memory.dmpFilesize
1.8MB