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Analysis
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max time kernel
173s -
max time network
188s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
20/02/2022, 05:04
Static task
static1
Behavioral task
behavioral1
Sample
84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe
Resource
win10v2004-en-20220112
General
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Target
84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe
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Size
167KB
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MD5
bbaf622ea0f80ceb357e19519bca0a49
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SHA1
a7deca0a331beba2a94e20d34e44c44f4d7cd6b6
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SHA256
84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e
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SHA512
20329239226f3c44be4736e3bb5df4f9f8dee477e939b34b7f9d334c6210c70855ad1a827487260879854a3c750ad4ecab782b1e71e955873ea51ed8ae5f805a
Malware Config
Extracted
C:\RyukReadMe.txt
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) 3 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\Application Data\Application Data\History\desktop.ini 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.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\desktop.ini 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe File opened for modification C:\Documents and Settings\Admin\3D Objects\desktop.ini 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.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 6 IoCs
pid Process 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe Token: SeBackupPrivilege 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 2400 wrote to memory of 2232 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 38 PID 2400 wrote to memory of 2256 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 37 PID 2400 wrote to memory of 2300 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 36 PID 2400 wrote to memory of 2552 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 34 PID 2400 wrote to memory of 2744 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 33 PID 2400 wrote to memory of 2908 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 31 PID 2400 wrote to memory of 2972 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 30 PID 2400 wrote to memory of 3056 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 29 PID 2400 wrote to memory of 2824 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 28 PID 2400 wrote to memory of 3332 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 26 PID 2400 wrote to memory of 3952 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 24 PID 2400 wrote to memory of 2152 2400 84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe 63
Processes
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵PID:3952
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵PID:3332
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵PID:2824
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C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca1⤵PID:3056
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵PID:2972
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C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca1⤵PID:2908
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C:\Windows\system32\DllHost.exeC:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}1⤵PID:2744
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p1⤵PID:2552
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C:\Windows\system32\taskhostw.exetaskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}1⤵PID:2300
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k UnistackSvcGroup1⤵PID:2256
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C:\Windows\system32\sihost.exesihost.exe1⤵PID:2232
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C:\Users\Admin\AppData\Local\Temp\84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe"C:\Users\Admin\AppData\Local\Temp\84df9b0cfcafbf57e05f6f675d95c8ee64c29f456329feb9c4a2945b8468df5e.exe"1⤵
- Drops desktop.ini file(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2400
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C:\Windows\system32\BackgroundTransferHost.exe"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.11⤵PID:2152
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C:\Windows\system32\MusNotifyIcon.exe%systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 131⤵PID:4444