Analysis
- max time kernel
102s - max time network
118s - platform
windows10-2004_x64 - resource
win10v2004-20240319-en - resource tags
- submitted
07/04/2024, 18:23
General
- Target 2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk.exe
- Size 796KB
- Sample240407-w1f2eabc35
- SHA256 7f61c22d966d4d79048c0bcadf5e4720c73b26f645aee7aa9e5ecc791310bb25
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 63 IoCs
- Suspicious behavior: LoadsDriver 2 IoCs
- Suspicious use of AdjustPrivilegeToken 41 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\2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-07_4cd331c21f5b43dfe2f41fd55ff8be08_cobalt-strike_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 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=1416 --field-trial-handle=2000,i,9877262470271371196,11878025205711850266,262144 --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\OpenSSH\ssh-agent.exeC:\Windows\System32\OpenSSH\ssh-agent.exe1⤵
- Executes dropped EXE
-
C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s SharedRealitySvc1⤵
-
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
-
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/636-73-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/636-65-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/636-238-0x0000000140000000-0x00000001400CF000-memory.dmp
memory/636-66-0x0000000140000000-0x00000001400CF000-memory.dmp
memory/764-366-0x0000000000AB0000-0x0000000000B10000-memory.dmp
memory/764-426-0x0000000140000000-0x0000000140102000-memory.dmp
memory/764-358-0x0000000140000000-0x0000000140102000-memory.dmp
memory/1444-439-0x0000000140000000-0x00000001400E2000-memory.dmp
memory/1444-370-0x0000000140000000-0x00000001400E2000-memory.dmp
memory/1444-378-0x0000000000860000-0x00000000008C0000-memory.dmp
memory/1640-454-0x0000000140000000-0x0000000140179000-memory.dmp
memory/1640-461-0x0000000000860000-0x00000000008C0000-memory.dmp
memory/1644-322-0x0000000000520000-0x0000000000580000-memory.dmp
memory/1644-382-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/1644-392-0x0000000000520000-0x0000000000580000-memory.dmp
memory/1644-315-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/1644-540-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/1972-312-0x0000000000520000-0x0000000000580000-memory.dmp
memory/1972-302-0x0000000140000000-0x0000000140095000-memory.dmp
memory/1972-369-0x0000000140000000-0x0000000140095000-memory.dmp
memory/2236-156-0x0000000140000000-0x00000001400AA000-memory.dmp
memory/2236-22-0x00000000006F0000-0x0000000000750000-memory.dmp
memory/2236-15-0x00000000006F0000-0x0000000000750000-memory.dmp
memory/2236-16-0x0000000140000000-0x00000001400AA000-memory.dmp
memory/2364-397-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/2364-398-0x0000000000680000-0x00000000006E0000-memory.dmp
memory/2364-383-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/2364-393-0x0000000000680000-0x00000000006E0000-memory.dmp
memory/2448-409-0x0000000000BF0000-0x0000000000C50000-memory.dmp
memory/2448-401-0x0000000140000000-0x0000000140147000-memory.dmp
memory/2804-231-0x0000000140000000-0x0000000140237000-memory.dmp
memory/2804-28-0x0000000000840000-0x00000000008A0000-memory.dmp
memory/2804-27-0x0000000140000000-0x0000000140237000-memory.dmp
memory/2804-34-0x0000000000840000-0x00000000008A0000-memory.dmp
memory/2864-0-0x0000000140000000-0x00000001400CF000-memory.dmp
memory/2864-1-0x0000000002D90000-0x0000000002DF0000-memory.dmp
memory/2864-11-0x0000000002D90000-0x0000000002DF0000-memory.dmp
memory/2864-7-0x0000000002D90000-0x0000000002DF0000-memory.dmp
memory/2864-8-0x0000000002D90000-0x0000000002DF0000-memory.dmp
memory/2864-13-0x0000000140000000-0x00000001400CF000-memory.dmp
memory/2968-414-0x0000000140000000-0x00000001401FC000-memory.dmp
memory/2968-422-0x0000000000500000-0x0000000000560000-memory.dmp
memory/3104-38-0x0000000000990000-0x00000000009F0000-memory.dmp
memory/3104-235-0x0000000140000000-0x0000000140245000-memory.dmp
memory/3104-40-0x0000000140000000-0x0000000140245000-memory.dmp
memory/3104-45-0x0000000000990000-0x00000000009F0000-memory.dmp
memory/3108-293-0x0000000000C00000-0x0000000000C60000-memory.dmp
memory/3108-284-0x0000000140000000-0x00000001400AB000-memory.dmp
memory/3108-349-0x0000000140000000-0x00000001400AB000-memory.dmp
memory/3108-355-0x0000000000C00000-0x0000000000C60000-memory.dmp
memory/3464-338-0x0000000000710000-0x0000000000770000-memory.dmp
memory/3464-328-0x0000000140000000-0x0000000140096000-memory.dmp
memory/3464-400-0x0000000140000000-0x0000000140096000-memory.dmp
memory/3652-64-0x0000000140000000-0x00000001400CA000-memory.dmp
memory/3652-60-0x0000000001A70000-0x0000000001AD0000-memory.dmp
memory/3652-57-0x0000000001A70000-0x0000000001AD0000-memory.dmp
memory/3652-49-0x0000000140000000-0x00000001400CA000-memory.dmp
memory/3652-50-0x0000000001A70000-0x0000000001AD0000-memory.dmp
memory/4188-269-0x0000000000D70000-0x0000000000DD0000-memory.dmp
memory/4188-254-0x0000000140000000-0x0000000140135000-memory.dmp
memory/4188-255-0x0000000000D70000-0x0000000000DD0000-memory.dmp
memory/4188-264-0x0000000000D70000-0x0000000000DD0000-memory.dmp
memory/4188-268-0x0000000140000000-0x0000000140135000-memory.dmp
memory/4516-428-0x0000000140000000-0x0000000140216000-memory.dmp
memory/4516-436-0x0000000000780000-0x00000000007E0000-memory.dmp
memory/4576-271-0x0000000140000000-0x00000001400B9000-memory.dmp
memory/4576-335-0x0000000140000000-0x00000001400B9000-memory.dmp
memory/4576-279-0x0000000000710000-0x0000000000770000-memory.dmp
memory/4624-449-0x00000000005B0000-0x0000000000610000-memory.dmp
memory/4624-440-0x0000000140000000-0x00000001400C6000-memory.dmp
memory/4748-299-0x0000000000400000-0x0000000000497000-memory.dmp
memory/4748-363-0x0000000000400000-0x0000000000497000-memory.dmp
memory/4872-413-0x0000000140000000-0x0000000140169000-memory.dmp
memory/4872-341-0x0000000140000000-0x0000000140169000-memory.dmp
memory/4872-351-0x0000000000720000-0x0000000000780000-memory.dmp
memory/4896-250-0x00000000006C0000-0x0000000000720000-memory.dmp
memory/4896-243-0x0000000140000000-0x00000001400A9000-memory.dmp
memory/4896-244-0x00000000006C0000-0x0000000000720000-memory.dmp
memory/4896-310-0x0000000140000000-0x00000001400A9000-memory.dmp