Analysis
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max time kernel
188s -
max time network
204s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
20/02/2022, 00:16
Static task
static1
Behavioral task
behavioral1
Sample
f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe
Resource
win7-en-20211208
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe
Resource
win10v2004-en-20220112
windows10-2004_x64
0 signatures
0 seconds
General
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Target
f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe
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Size
188KB
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MD5
81a657edce1fc7c97e2e3367e676339f
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SHA1
13a1686aaaba2c46792b468ca78f6f20a3817468
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SHA256
f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682
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SHA512
2233a938fa19a39d9052a2e339b18b140d9e258a9d3394219e60c636095566647faacba4ee72d007ade4c768cdece84b373f029bb19e53b3279e99f1204ee07e
Score
10/10
Malware Config
Extracted
Path
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
Family
ryuk
Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������
Emails
Extracted
Path
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
Family
ryuk
Ransom Note
[email protected]
balance of shadow universe
Ryuk
Emails
Signatures
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Ryuk
Ransomware distributed via existing botnets, often Trickbot or Emotet.
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Executes dropped EXE 1 IoCs
pid Process 560 VhocDwe.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation VhocDwe.exe -
Drops file in Windows directory 1 IoCs
description ioc Process File opened for modification C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\DeliveryOptimization\State\keyValueLKG.dat svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz MusNotifyIcon.exe Key opened \Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0 MusNotifyIcon.exe -
Modifies data under HKEY_USERS 45 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PeerInfoCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\GroupConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\NormalDownloadPendingCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrBps = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\Geo_EndpointFullUri = "https://geo.prod.do.dsp.mp.microsoft.com/geo" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkBps = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CPUpct = "0.228571" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DODownloadMode = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyLanBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\KVFileExpirationTime = "132899665031120379" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownlinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MemoryUsageKB = "4076" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCacheHostBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CacheSizeBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LANConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\BkDownloadRatePct = "45" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadPendingCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\DownloadMode_BackCompat = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLanBytes = "0" svchost.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config\GeoVersion_EndpointFullUri = "https://geover.prod.do.dsp.mp.microsoft.com/geoversion" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\InternetConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\FrDownloadRatePct = "90" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Settings svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyLinkLocalBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyGroupBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthID = "2" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\CDNConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\MonthlyUploadRestriction = "0" svchost.exe Key created \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\PriorityDownloadCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateBkBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\LinkLocalConnectionCount = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UplinkUsageBps = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadMonthlyInternetBytes = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyRateFrCnt = "0" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\SwarmCount = "1" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\UploadRatePct = "100" svchost.exe Set value (int) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Usage\DownloadMonthlyCdnBytes = "0" svchost.exe -
Runs net.exe
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Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 560 VhocDwe.exe 560 VhocDwe.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeBackupPrivilege 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe Token: SeBackupPrivilege 560 VhocDwe.exe -
Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 1364 wrote to memory of 560 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 73 PID 1364 wrote to memory of 560 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 73 PID 1364 wrote to memory of 560 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 73 PID 1364 wrote to memory of 4024 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 74 PID 1364 wrote to memory of 4024 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 74 PID 1364 wrote to memory of 4024 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 74 PID 560 wrote to memory of 2996 560 VhocDwe.exe 77 PID 560 wrote to memory of 2996 560 VhocDwe.exe 77 PID 560 wrote to memory of 2996 560 VhocDwe.exe 77 PID 1364 wrote to memory of 912 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 76 PID 1364 wrote to memory of 912 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 76 PID 1364 wrote to memory of 912 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 76 PID 1364 wrote to memory of 1240 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 75 PID 1364 wrote to memory of 1240 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 75 PID 1364 wrote to memory of 1240 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 75 PID 560 wrote to memory of 3624 560 VhocDwe.exe 78 PID 560 wrote to memory of 3624 560 VhocDwe.exe 78 PID 560 wrote to memory of 3624 560 VhocDwe.exe 78 PID 1364 wrote to memory of 4036 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 79 PID 1364 wrote to memory of 4036 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 79 PID 1364 wrote to memory of 4036 1364 f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe 79 PID 4036 wrote to memory of 4264 4036 net.exe 90 PID 4036 wrote to memory of 4264 4036 net.exe 90 PID 4036 wrote to memory of 4264 4036 net.exe 90 PID 4024 wrote to memory of 4248 4024 net.exe 91 PID 4024 wrote to memory of 4248 4024 net.exe 91 PID 4024 wrote to memory of 4248 4024 net.exe 91 PID 1240 wrote to memory of 4252 1240 net.exe 89 PID 1240 wrote to memory of 4252 1240 net.exe 89 PID 1240 wrote to memory of 4252 1240 net.exe 89 PID 912 wrote to memory of 4272 912 net.exe 88 PID 912 wrote to memory of 4272 912 net.exe 88 PID 912 wrote to memory of 4272 912 net.exe 88 PID 3624 wrote to memory of 4280 3624 net.exe 87 PID 3624 wrote to memory of 4280 3624 net.exe 87 PID 3624 wrote to memory of 4280 3624 net.exe 87 PID 2996 wrote to memory of 4284 2996 net.exe 86 PID 2996 wrote to memory of 4284 2996 net.exe 86 PID 2996 wrote to memory of 4284 2996 net.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe"C:\Users\Admin\AppData\Local\Temp\f63501542310745baa8fa2026930590cd690b53bfddb940378eca685a2c5e682.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1364 -
C:\Users\Admin\AppData\Local\Temp\VhocDwe.exe"C:\Users\Admin\AppData\Local\Temp\VhocDwe.exe" 8 LAN2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:560 -
C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y3⤵
- Suspicious use of WriteProcessMemory
PID:2996 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y4⤵PID:4284
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y3⤵
- Suspicious use of WriteProcessMemory
PID:3624 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y4⤵PID:4280
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y2⤵
- Suspicious use of WriteProcessMemory
PID:4024 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y3⤵PID:4248
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y2⤵
- Suspicious use of WriteProcessMemory
PID:1240 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "audioendpointbuilder" /y3⤵PID:4252
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:912 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:4272
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C:\Windows\SysWOW64\net.exe"C:\Windows\System32\net.exe" stop "samss" /y2⤵
- Suspicious use of WriteProcessMemory
PID:4036 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 stop "samss" /y3⤵PID:4264
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C:\Windows\system32\MusNotifyIcon.exe%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 131⤵
- Checks processor information in registry
PID:1004
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
PID:748