Analysis
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max time kernel
153s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
20/10/2022, 22:29
Static task
static1
Behavioral task
behavioral1
Sample
04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe
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Size
184KB
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MD5
41aa7f6bb4cf25aaf495465c39b7f8e5
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SHA1
240fe97425169a2220c80d01abfcf1f33265ead0
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SHA256
04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef
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SHA512
4a5d953b3f2ec6467d6bd3f02ef6747b9ef6ca883ff352fe8ead842a7466f99ecf69f0c3d6ef5b96a0d6186ab7877a0588e790916c6f1593bc9dec04ef3fee0d
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SSDEEP
3072:pfet6ihROnFRvKltVo6qHOhpBTavHRcph8f4edZlSL6aOuTOunpE7bVGTvGDAkXv:pfTOXnBWJcphTedZlSL6aOuTOunpE7bc
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" nkreac.exe -
Executes dropped EXE 1 IoCs
pid Process 4440 nkreac.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe -
Adds Run key to start application 2 TTPs 54 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /S" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /H" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /x" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /v" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /R" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /p" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /t" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /k" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /I" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /g" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /a" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /l" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /Z" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /i" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /O" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /C" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /G" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /h" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /D" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /E" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /Y" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /b" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /Q" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /N" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /n" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /m" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /z" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /y" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /F" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /W" 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /o" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /c" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /q" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /e" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /L" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /P" nkreac.exe Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\ nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /s" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /f" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /A" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /M" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /V" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /j" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /W" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /u" nkreac.exe Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /K" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /J" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /U" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /X" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /d" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /T" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /w" nkreac.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nkreac = "C:\\Users\\Admin\\nkreac.exe /r" nkreac.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe 4440 nkreac.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 4440 nkreac.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2328 wrote to memory of 4440 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 84 PID 2328 wrote to memory of 4440 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 84 PID 2328 wrote to memory of 4440 2328 04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe"C:\Users\Admin\AppData\Local\Temp\04993d8278c4104d4ce5b2f848151ec3faf9df158b4830a6b5d7eb9eb13f06ef.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2328 -
C:\Users\Admin\nkreac.exe"C:\Users\Admin\nkreac.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4440
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
184KB
MD56fe310d655f60ad27a327f2067da8d79
SHA1ae0984aebec5a02ead3ec8c1eac79fff059670b0
SHA256d5e07840b7618171bd02dc6037151522ce5a347d0b12f439b8cad620c6b40e6a
SHA51214b5c0e1ef9c74417b8726959f9ef105d289e57f34fe85aee4be0b071c98d35e04dc69c8901c6c2b313de48945d623a68c014e19512b45e6cdf6ddca396633f0
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Filesize
184KB
MD56fe310d655f60ad27a327f2067da8d79
SHA1ae0984aebec5a02ead3ec8c1eac79fff059670b0
SHA256d5e07840b7618171bd02dc6037151522ce5a347d0b12f439b8cad620c6b40e6a
SHA51214b5c0e1ef9c74417b8726959f9ef105d289e57f34fe85aee4be0b071c98d35e04dc69c8901c6c2b313de48945d623a68c014e19512b45e6cdf6ddca396633f0