Analysis
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max time kernel
168s -
max time network
32s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
20-02-2022 01:18
Static task
static1
Behavioral task
behavioral1
Sample
def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe
Resource
win10v2004-en-20220112
General
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Target
def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe
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Size
202KB
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MD5
19c2252f877112192dd1112dde32e3d4
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SHA1
33f7c585527d012ba115d313003ca52b0fabcdb6
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SHA256
def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86
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SHA512
4f639986b6464c5b7802ed8f4bb2f069489da5ea556181db51b0ced62cf9e0f2afc8287d99b7a3678ed9402b629f4205dd8a92c4f4862977b2294f7df2a941bc
Malware Config
Extracted
C:\RyukReadMe.html
ryuk
Signatures
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Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
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Drops desktop.ini file(s) 61 IoCs
description ioc Process File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\S3IV548V\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Desktop\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Pictures\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\History\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Links\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Startup\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Start Menu\Programs\Accessories\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\NK9YD4KU\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\T7AS43M2\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\SendTo\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\T7AS43M2\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Searches\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Videos\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\K819CMRP\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\RO7FJFDE\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Documents\My Pictures\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Start Menu\Programs\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Music\Sample Music\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\QDAZQ7UR\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\FNOUQX38\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\T0STXTA8\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Documents\My Music\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Favorites\Links\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Recent\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\History\History.IE5\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Contacts\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Downloads\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Pictures\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\S3IV548V\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Favorites\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\NK9YD4KU\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Documents\My Videos\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Accessories\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Desktop\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Music\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\RO7FJFDE\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\QDAZQ7UR\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\T0STXTA8\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Accessories\Accessibility\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Administrative Tools\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Maintenance\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Videos\Sample Videos\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Saved Games\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Feeds Cache\K819CMRP\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Microsoft\Windows Mail\Stationery\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Documents\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Start Menu\Programs\Accessories\System Tools\Desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Start Menu\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temporary Internet Files\Content.IE5\FNOUQX38\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\Admin\Favorites\Links for United States\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Desktop\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe File opened for modification C:\Documents and Settings\All Users\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Documents\My Pictures\Sample Pictures\desktop.ini def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Runs net.exe
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Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeBackupPrivilege 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe -
Suspicious use of WriteProcessMemory 24 IoCs
description pid Process procid_target PID 1820 wrote to memory of 524 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 28 PID 1820 wrote to memory of 524 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 28 PID 1820 wrote to memory of 524 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 28 PID 1820 wrote to memory of 1652 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 29 PID 1820 wrote to memory of 1652 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 29 PID 1820 wrote to memory of 1652 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 29 PID 524 wrote to memory of 1744 524 net.exe 32 PID 1652 wrote to memory of 1772 1652 net.exe 31 PID 1652 wrote to memory of 1772 1652 net.exe 31 PID 1652 wrote to memory of 1772 1652 net.exe 31 PID 524 wrote to memory of 1744 524 net.exe 32 PID 524 wrote to memory of 1744 524 net.exe 32 PID 1820 wrote to memory of 15176 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 36 PID 1820 wrote to memory of 15176 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 36 PID 1820 wrote to memory of 15176 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 36 PID 15176 wrote to memory of 15320 15176 net.exe 38 PID 15176 wrote to memory of 15320 15176 net.exe 38 PID 15176 wrote to memory of 15320 15176 net.exe 38 PID 1820 wrote to memory of 740 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 40 PID 1820 wrote to memory of 740 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 40 PID 1820 wrote to memory of 740 1820 def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe 40 PID 740 wrote to memory of 680 740 net.exe 42 PID 740 wrote to memory of 680 740 net.exe 42 PID 740 wrote to memory of 680 740 net.exe 42
Processes
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C:\Users\Admin\AppData\Local\Temp\def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe"C:\Users\Admin\AppData\Local\Temp\def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe"1⤵
- Drops desktop.ini file(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820 -
C:\Windows\System32\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y2⤵
- Suspicious use of WriteProcessMemory
PID:524 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y3⤵PID:1744
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C:\Windows\System32\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:1652 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:1772
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C:\Windows\System32\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:15176 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:15320
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C:\Windows\System32\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:740 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:680
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