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Analysis
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max time kernel
174s -
max time network
175s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
14/10/2022, 10:18
Static task
static1
Behavioral task
behavioral1
Sample
dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe
Resource
win7-20220812-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe
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Size
96KB
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MD5
7ab167132649ab567173240f880c9085
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SHA1
f74628fcbc1716bc5725398d7d5a69940eb37e1e
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SHA256
dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935
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SHA512
00e6ce662252d4761778e046c4633fd29b5185066f7da50629a31d06136917bcda8788c08bcbe9efae9660dedf4d55d101b8e452da12c7ef757d6af5d3d96a4b
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SSDEEP
1536:0bzDchOULMD/2BzqBRpHf8ZyuBs+/PFilZIi6XI:Az8OrD/2B2d8ZyuRAyX
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" dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe Set value (int) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" korud.exe -
Executes dropped EXE 1 IoCs
pid Process 4092 korud.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 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /l" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /b" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /n" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /m" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /j" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /p" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /r" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /w" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /e" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /q" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /a" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /c" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /x" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /u" korud.exe Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\ dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run\ korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /f" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /z" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /d" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /o" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /t" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /s" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /y" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /g" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /i" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /k" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /f" dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /v" korud.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\korud = "C:\\Users\\Admin\\korud.exe /h" korud.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 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe 4092 korud.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 4092 korud.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2508 wrote to memory of 4092 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 84 PID 2508 wrote to memory of 4092 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 84 PID 2508 wrote to memory of 4092 2508 dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.exe"C:\Users\Admin\AppData\Local\Temp\dccdf574feb4ed14718efd3580da529efdb429f05015e70040bc389e45de0935.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:2508 -
C:\Users\Admin\korud.exe"C:\Users\Admin\korud.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:4092
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
96KB
MD513d74bbf162cc1724983730b7424cf91
SHA13bafcee2d5ee756eba95e46942e7337d98aa1c74
SHA256bc10663823479caf7bb64c233312771146c64decf343e13b4a5ccbef24d41c68
SHA512de31b22a5eb33c77d09e8a298f890f7fbb2ed02b8dbe4e299281229c325b4f9e225e84d96576845db193a0a871fa69e05aecab68d55999d60ca69b5ccfe86841
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Filesize
96KB
MD513d74bbf162cc1724983730b7424cf91
SHA13bafcee2d5ee756eba95e46942e7337d98aa1c74
SHA256bc10663823479caf7bb64c233312771146c64decf343e13b4a5ccbef24d41c68
SHA512de31b22a5eb33c77d09e8a298f890f7fbb2ed02b8dbe4e299281229c325b4f9e225e84d96576845db193a0a871fa69e05aecab68d55999d60ca69b5ccfe86841