Analysis
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max time kernel
267s -
max time network
336s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
05-12-2022 22:11
Static task
static1
Behavioral task
behavioral1
Sample
c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe
Resource
win10v2004-20221111-en
windows10-2004-x64
0 signatures
150 seconds
General
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Target
c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe
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Size
276KB
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MD5
5e913bc038760f939a30fe8d32f78c1c
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SHA1
cf874fdcf0abc976c2174195950dc14c3b7d8b47
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SHA256
c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527
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SHA512
25290a0410d67b3581d8985a28ee6cf8e7ff4e8b7107391cb7821e291dfc7225e73bfe8d23c7208d5b54ea979c64515073bb8b3678ded733cfb138a01b2c4001
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SSDEEP
6144:t+JDkEPCDMzJu749QeAWyBLTURx44IhRdo:tDwzJuZeNeLTUR67o
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-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe Set value (int) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" dayun.exe -
Executes dropped EXE 1 IoCs
pid Process 1916 dayun.exe -
Loads dropped DLL 2 IoCs
pid Process 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe -
Adds Run key to start application 2 TTPs 29 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /f" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /h" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /u" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /j" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /n" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /b" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /i" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /e" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /x" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /w" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /y" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /k" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /g" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /d" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /a" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /r" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /z" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /l" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /m" c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /q" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /v" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /p" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /t" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /m" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /o" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /s" dayun.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\dayun = "C:\\Users\\Admin\\dayun.exe /c" dayun.exe Key created \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe Key created \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ dayun.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 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe 1916 dayun.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 1916 dayun.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1028 wrote to memory of 1916 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 27 PID 1028 wrote to memory of 1916 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 27 PID 1028 wrote to memory of 1916 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 27 PID 1028 wrote to memory of 1916 1028 c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe 27
Processes
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C:\Users\Admin\AppData\Local\Temp\c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe"C:\Users\Admin\AppData\Local\Temp\c8ece799156f45736cc2c8c2893411aecb0ca6577d58f721cc009c462fc23527.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1028 -
C:\Users\Admin\dayun.exe"C:\Users\Admin\dayun.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:1916
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
276KB
MD51d79548c4b3f93a8b84891089f123dfa
SHA1f6ba20021485f059fee73da94b50e7ad101353d4
SHA256fdddee36f1e137508a63ef0876eb7438ebc7fe0b4d807110da104e49f83611b2
SHA51280be98d3af232324c2357caba30906fb964b7c9d56e2275b9497accf837e24380c8a2d55f0d285234b478c864738e4355ff9ee90a0005d2784c4191861c2452c
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Filesize
276KB
MD51d79548c4b3f93a8b84891089f123dfa
SHA1f6ba20021485f059fee73da94b50e7ad101353d4
SHA256fdddee36f1e137508a63ef0876eb7438ebc7fe0b4d807110da104e49f83611b2
SHA51280be98d3af232324c2357caba30906fb964b7c9d56e2275b9497accf837e24380c8a2d55f0d285234b478c864738e4355ff9ee90a0005d2784c4191861c2452c
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Filesize
276KB
MD51d79548c4b3f93a8b84891089f123dfa
SHA1f6ba20021485f059fee73da94b50e7ad101353d4
SHA256fdddee36f1e137508a63ef0876eb7438ebc7fe0b4d807110da104e49f83611b2
SHA51280be98d3af232324c2357caba30906fb964b7c9d56e2275b9497accf837e24380c8a2d55f0d285234b478c864738e4355ff9ee90a0005d2784c4191861c2452c
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Filesize
276KB
MD51d79548c4b3f93a8b84891089f123dfa
SHA1f6ba20021485f059fee73da94b50e7ad101353d4
SHA256fdddee36f1e137508a63ef0876eb7438ebc7fe0b4d807110da104e49f83611b2
SHA51280be98d3af232324c2357caba30906fb964b7c9d56e2275b9497accf837e24380c8a2d55f0d285234b478c864738e4355ff9ee90a0005d2784c4191861c2452c