Analysis
- max time kernel
149s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240319-en - resource tags
- submitted
04/04/2024, 11:02
General
- Target 2024-04-04_74f2788c359d3def3a562083d518f4af_ryuk.exe
- Size 1.8MB
- Sample240404-m5cecadf72
- SHA256 9d426c40235d3fc55969ad76589b977f22a4cdd5a0b17901c20ab59da6b66591
Malware Config
Signatures
- Executes dropped EXE 22 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Drops file in System32 directory 24 IoCs
- Drops file in Program Files directory 64 IoCs
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks SCSI registry key(s) 3 TTPs 64 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies data under HKEY_USERS 64 IoCs
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious behavior: LoadsDriver 2 IoCs
- Suspicious use of AdjustPrivilegeToken 43 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-04-04_74f2788c359d3def3a562083d518f4af_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-04_74f2788c359d3def3a562083d518f4af_ryuk.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\alg.exeC:\Windows\System32\alg.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
-
C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
C:\Program Files (x86)\Microsoft\Edge\Application\122.0.2365.92\elevation_service.exe"C:\Program Files (x86)\Microsoft\Edge\Application\122.0.2365.92\elevation_service.exe"1⤵
- Executes dropped EXE
-
C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"1⤵
- Executes dropped EXE
-
\??\c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE"c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE"1⤵
- Executes dropped EXE
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4020 --field-trial-handle=3408,i,16599691418790971742,134777455365707676,262144 --variations-seed-version /prefetch:81⤵
-
C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exeC:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe1⤵
- Executes dropped EXE
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p -s TapiSrv1⤵
-
C:\Windows\system32\fxssvc.exeC:\Windows\system32\fxssvc.exe1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\msdtc.exeC:\Windows\System32\msdtc.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows directory
-
C:\Windows\system32\PerceptionSimulation\PerceptionSimulationService.exeC:\Windows\system32\PerceptionSimulation\PerceptionSimulationService.exe1⤵
- Executes dropped EXE
-
C:\Windows\SysWow64\perfhost.exeC:\Windows\SysWow64\perfhost.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\locator.exeC:\Windows\system32\locator.exe1⤵
- Executes dropped EXE
-
C:\Windows\System32\SensorDataService.exeC:\Windows\System32\SensorDataService.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
-
C:\Windows\System32\snmptrap.exeC:\Windows\System32\snmptrap.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\spectrum.exeC:\Windows\system32\spectrum.exe1⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s SharedRealitySvc1⤵
-
C:\Windows\System32\OpenSSH\ssh-agent.exeC:\Windows\System32\OpenSSH\ssh-agent.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\TieringEngineService.exeC:\Windows\system32\TieringEngineService.exe1⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\AgentService.exeC:\Windows\system32\AgentService.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\wbem\WmiApSrv.exeC:\Windows\system32\wbem\WmiApSrv.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\SearchIndexer.exeC:\Windows\system32\SearchIndexer.exe /Embedding1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\SearchProtocolHost.exe"C:\Windows\system32\SearchProtocolHost.exe" Global\UsGthrFltPipeMssGthrPipe1_ Global\UsGthrCtrlFltPipeMssGthrPipe1 1 -2147483646 "Software\Microsoft\Windows Search" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT; MS Search 4.0 Robot)" "C:\ProgramData\Microsoft\Search\Data\Temp\usgthrsvc" "DownLevelDaemon"2⤵
- Modifies data under HKEY_USERS
-
-
C:\Windows\system32\SearchFilterHost.exe"C:\Windows\system32\SearchFilterHost.exe" 0 912 916 924 8192 920 8962⤵
- Modifies data under HKEY_USERS
-
-
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe1⤵
-
C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k UnistackSvcGroup1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
elevation_service.exe
maintenanceservice.exe
7z.exe
7zFM.exe
7zG.exe
Uninstall.exe
AppVShNotify.exe
IntegratedOffice.exe
MavInject32.exe
OfficeC2RClient.exe
appvcleaner.exe
LICLUA.EXE
OSE.EXE
VSTOInstaller.exe
chrmstp.exe
setup.exe
chrome_pwa_launcher.exe
elevation_service.exe
notification_helper.exe
chrome_proxy.exe
appletviewer.exe
extcheck.exe
idlj.exe
jabswitch.exe
jar.exe
jarsigner.exe
java-rmi.exe
java.exe
javac.exe
javadoc.exe
javafxpackager.exe
javah.exe
javap.exe
javapackager.exe
javaw.exe
javaws.exe
jcmd.exe
jconsole.exe
jdb.exe
jdeps.exe
jhat.exe
jinfo.exe
jjs.exe
dotnet.exe
perfhost.exe
AgentService.exe
DiagnosticsHub.StandardCollector.Service.exe
FXSSVC.exe
Locator.exe
ssh-agent.exe
PerceptionSimulationService.exe
SearchIndexer.exe
SensorDataService.exe
Spectrum.exe
TieringEngineService.exe
VSSVC.exe
alg.exe
msdtc.exe
snmptrap.exe
vds.exe
WmiApSrv.exe
wbengine.exe
memory/640-40-0x0000000140000000-0x0000000140245000-memory.dmp
memory/640-47-0x0000000000990000-0x00000000009F0000-memory.dmp
memory/640-41-0x0000000000990000-0x00000000009F0000-memory.dmp
memory/640-236-0x0000000140000000-0x0000000140245000-memory.dmp
memory/816-330-0x0000000140000000-0x0000000140136000-memory.dmp
memory/816-399-0x0000000140000000-0x0000000140136000-memory.dmp
memory/816-339-0x00000000006F0000-0x0000000000750000-memory.dmp
memory/1128-74-0x00000000004F0000-0x0000000000550000-memory.dmp
memory/1128-67-0x00000000004F0000-0x0000000000550000-memory.dmp
memory/1128-68-0x0000000140000000-0x0000000140170000-memory.dmp
memory/1128-237-0x0000000140000000-0x0000000140170000-memory.dmp
memory/1476-371-0x0000000140000000-0x0000000140182000-memory.dmp
memory/1476-379-0x00000000007C0000-0x0000000000820000-memory.dmp
memory/1476-439-0x0000000140000000-0x0000000140182000-memory.dmp
memory/1748-383-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/1748-540-0x0000000000770000-0x00000000007D0000-memory.dmp
memory/1748-324-0x0000000000770000-0x00000000007D0000-memory.dmp
memory/1748-317-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/1748-539-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/2524-401-0x0000000140000000-0x0000000140147000-memory.dmp
memory/2524-410-0x0000000000BB0000-0x0000000000C10000-memory.dmp
memory/2656-370-0x0000000140000000-0x0000000140135000-memory.dmp
memory/2656-313-0x0000000000710000-0x0000000000770000-memory.dmp
memory/2656-303-0x0000000140000000-0x0000000140135000-memory.dmp
memory/2804-144-0x0000000140000000-0x000000014014A000-memory.dmp
memory/2804-24-0x00000000006E0000-0x0000000000740000-memory.dmp
memory/2804-23-0x00000000006E0000-0x0000000000740000-memory.dmp
memory/2804-18-0x0000000140000000-0x000000014014A000-memory.dmp
memory/2804-16-0x00000000006E0000-0x0000000000740000-memory.dmp
memory/3024-285-0x0000000140000000-0x000000014014B000-memory.dmp
memory/3024-297-0x0000000000BF0000-0x0000000000C50000-memory.dmp
memory/3024-352-0x0000000140000000-0x000000014014B000-memory.dmp
memory/3228-66-0x0000000140000000-0x000000014016B000-memory.dmp
memory/3228-63-0x0000000000CD0000-0x0000000000D30000-memory.dmp
memory/3228-59-0x0000000000CD0000-0x0000000000D30000-memory.dmp
memory/3228-51-0x0000000000CD0000-0x0000000000D30000-memory.dmp
memory/3228-52-0x0000000140000000-0x000000014016B000-memory.dmp
memory/3468-366-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3468-300-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4228-30-0x00000000007F0000-0x0000000000850000-memory.dmp
memory/4228-229-0x0000000140000000-0x0000000140237000-memory.dmp
memory/4228-36-0x00000000007F0000-0x0000000000850000-memory.dmp
memory/4228-29-0x0000000140000000-0x0000000140237000-memory.dmp
memory/4364-0-0x00000000007A0000-0x0000000000800000-memory.dmp
memory/4364-7-0x00000000007A0000-0x0000000000800000-memory.dmp
memory/4364-14-0x0000000140000000-0x00000001401DC000-memory.dmp
memory/4364-12-0x00000000007A0000-0x0000000000800000-memory.dmp
memory/4364-1-0x0000000140000000-0x00000001401DC000-memory.dmp
memory/4364-8-0x00000000007A0000-0x0000000000800000-memory.dmp
memory/5208-413-0x0000000140000000-0x0000000140169000-memory.dmp
memory/5208-353-0x0000000000730000-0x0000000000790000-memory.dmp
memory/5208-343-0x0000000140000000-0x0000000140169000-memory.dmp
memory/5308-367-0x0000000000D40000-0x0000000000DA0000-memory.dmp
memory/5308-357-0x0000000140000000-0x00000001401A3000-memory.dmp
memory/5308-426-0x0000000140000000-0x00000001401A3000-memory.dmp
memory/5464-393-0x0000000000BC0000-0x0000000000C20000-memory.dmp
memory/5464-384-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/5464-398-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/5464-400-0x0000000000BC0000-0x0000000000C20000-memory.dmp
memory/5580-251-0x0000000000690000-0x00000000006F0000-memory.dmp
memory/5580-311-0x0000000140000000-0x0000000140149000-memory.dmp
memory/5580-244-0x0000000140000000-0x0000000140149000-memory.dmp
memory/5580-245-0x0000000000690000-0x00000000006F0000-memory.dmp
memory/5644-422-0x0000000000500000-0x0000000000560000-memory.dmp
memory/5644-414-0x0000000140000000-0x00000001401FC000-memory.dmp
memory/5752-264-0x0000000000DC0000-0x0000000000E20000-memory.dmp
memory/5752-256-0x0000000000DC0000-0x0000000000E20000-memory.dmp
memory/5752-255-0x0000000140000000-0x0000000140135000-memory.dmp
memory/5752-270-0x0000000140000000-0x0000000140135000-memory.dmp
memory/5752-273-0x0000000000DC0000-0x0000000000E20000-memory.dmp
memory/5832-342-0x0000000000570000-0x00000000005D0000-memory.dmp
memory/5832-336-0x0000000140000000-0x0000000140159000-memory.dmp
memory/5832-271-0x0000000140000000-0x0000000140159000-memory.dmp
memory/5832-279-0x0000000000570000-0x00000000005D0000-memory.dmp
memory/5856-427-0x0000000140000000-0x0000000140216000-memory.dmp
memory/5856-435-0x0000000000720000-0x0000000000780000-memory.dmp
memory/5980-441-0x0000000140000000-0x0000000140166000-memory.dmp
memory/5980-448-0x0000000000680000-0x00000000006E0000-memory.dmp
memory/6116-462-0x0000000000700000-0x0000000000760000-memory.dmp
memory/6116-454-0x0000000140000000-0x0000000140179000-memory.dmp