Analysis Overview
SHA256
7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9
Threat Level: Known bad
The file 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 was found to be: Known bad.
Malicious Activity Summary
Ryuk
Executes dropped EXE
Checks computer location settings
Loads dropped DLL
Adds Run key to start application
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Runs net.exe
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-02-20 05:44
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-02-20 05:44
Reported
2022-02-20 06:32
Platform
win7-en-20211208
Max time kernel
174s
Max time network
148s
Command Line
Signatures
Ryuk
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\QUkJTEr.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
Enumerates physical storage devices
Runs net.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\taskhost.exe
"taskhost.exe"
C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
"C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"
C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
"C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" 8 LAN
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" /f /reg:64
C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe" /f /reg:64
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
Network
| Country | Destination | Domain | Proto |
| N/A | 10.127.0.1:7 | udp | |
| NL | 154.61.71.13:7 | udp | |
| N/A | 224.0.0.22:7 | udp | |
| N/A | 224.0.0.252:7 | udp | |
| N/A | 239.255.255.250:7 | udp |
Files
memory/1700-55-0x0000000075F91000-0x0000000075F93000-memory.dmp
\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
| MD5 | 708f63f5ef0bafa61743f242f470480f |
| SHA1 | 96233bf3b488a31852b8e32f7cb91dd5d935f9c2 |
| SHA256 | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 |
| SHA512 | 5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9 |
\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
| MD5 | 708f63f5ef0bafa61743f242f470480f |
| SHA1 | 96233bf3b488a31852b8e32f7cb91dd5d935f9c2 |
| SHA256 | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 |
| SHA512 | 5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9 |
C:\Users\Admin\AppData\Local\Temp\QUkJTEr.exe
| MD5 | 708f63f5ef0bafa61743f242f470480f |
| SHA1 | 96233bf3b488a31852b8e32f7cb91dd5d935f9c2 |
| SHA256 | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 |
| SHA512 | 5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9 |
memory/1108-60-0x0000000030000000-0x0000000030170000-memory.dmp
C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\08e575673cce10c72090304839888e02_3bd845b8-ce6a-4337-9974-31490196462a
| MD5 | 93a5aadeec082ffc1bca5aa27af70f52 |
| SHA1 | 47a92aee3ea4d1c1954ed4da9f86dd79d9277d31 |
| SHA256 | a1a21799e98f97f271657ce656076f33dcb020d9370f1f2671d783cafd230294 |
| SHA512 | df388c8d83e779e006d6311b2046fcf9259ec33d379fc0e2c6a4b6b90418f587a12c5c23acd488413a02568ca2d3effe04608ec7c791925c7ed53dc71093ca45 |
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
| MD5 | b99d47f48bba763d4eded8882f9d3fae |
| SHA1 | aa0b195e158e91b93ea7aa97c3f02461b86b0163 |
| SHA256 | 577cfa8bd59e6c4b007b33f03fffe15adf180ca48b121bfe6a837cf481a234fb |
| SHA512 | ce3186e760f8c441a14a01cb52ed147985946d5a672095024aade10db7238ef38ee71fecbe2b3266a0c5018f694c79f28e4a87849861c1ba74a307240548714b |
Analysis: behavioral2
Detonation Overview
Submitted
2022-02-20 05:44
Reported
2022-02-20 06:34
Platform
win10v2004-en-20220113
Max time kernel
176s
Max time network
215s
Command Line
Signatures
Ryuk
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run | C:\Windows\SysWOW64\reg.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\oChGcDY.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
Enumerates physical storage devices
Runs net.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
"C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
C:\Windows\system32\backgroundTaskHost.exe
"C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
C:\Windows\System32\RuntimeBroker.exe
C:\Windows\System32\RuntimeBroker.exe -Embedding
C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
C:\Windows\system32\DllHost.exe
C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
C:\Windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
C:\Windows\system32\sihost.exe
sihost.exe
C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe
"C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe"
C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe
"C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe" 8 LAN
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "audioendpointbuilder" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9.exe" /f /reg:64
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe" /f /reg:64
C:\Windows\SysWOW64\reg.exe
REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe" /f /reg:64
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
C:\Windows\SysWOW64\net.exe
"C:\Windows\System32\net.exe" stop "samss" /y
C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop "samss" /y
Network
| Country | Destination | Domain | Proto |
| NL | 178.79.208.1:80 | tcp | |
| NL | 178.79.208.1:80 | tcp | |
| N/A | 10.127.0.1:7 | udp | |
| NL | 154.61.71.51:7 | udp | |
| N/A | 224.0.0.22:7 | udp | |
| N/A | 224.0.0.251:7 | udp | |
| N/A | 224.0.0.252:7 | udp | |
| N/A | 239.255.255.250:7 | udp |
Files
C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe
| MD5 | 708f63f5ef0bafa61743f242f470480f |
| SHA1 | 96233bf3b488a31852b8e32f7cb91dd5d935f9c2 |
| SHA256 | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 |
| SHA512 | 5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9 |
C:\Users\Admin\AppData\Local\Temp\oChGcDY.exe
| MD5 | 708f63f5ef0bafa61743f242f470480f |
| SHA1 | 96233bf3b488a31852b8e32f7cb91dd5d935f9c2 |
| SHA256 | 7433f2a47d324d386ed215930ab6607a7cce28d5cef868afe994582c409e5dc9 |
| SHA512 | 5e202f916430e179373c814e2b2cefbb993b83c597776afecea731c190f3aec1ce21c76ce1786afc8ab5d92c060201ce0828b9ac81d709407a8b6358146260c9 |
C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys\08e575673cce10c72090304839888e02_e269d2c1-0edf-4391-ac7b-818b8e88b04f
| MD5 | 93a5aadeec082ffc1bca5aa27af70f52 |
| SHA1 | 47a92aee3ea4d1c1954ed4da9f86dd79d9277d31 |
| SHA256 | a1a21799e98f97f271657ce656076f33dcb020d9370f1f2671d783cafd230294 |
| SHA512 | df388c8d83e779e006d6311b2046fcf9259ec33d379fc0e2c6a4b6b90418f587a12c5c23acd488413a02568ca2d3effe04608ec7c791925c7ed53dc71093ca45 |
C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html
| MD5 | b99d47f48bba763d4eded8882f9d3fae |
| SHA1 | aa0b195e158e91b93ea7aa97c3f02461b86b0163 |
| SHA256 | 577cfa8bd59e6c4b007b33f03fffe15adf180ca48b121bfe6a837cf481a234fb |
| SHA512 | ce3186e760f8c441a14a01cb52ed147985946d5a672095024aade10db7238ef38ee71fecbe2b3266a0c5018f694c79f28e4a87849861c1ba74a307240548714b |