Analysis
- max time kernel
149s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
03/04/2024, 10:28
General
- Target 2024-04-03_e43635f48f64f6d6a1b6c80b63c36ec3_ryuk.exe
- Size 1.8MB
- Sample240403-mhp2xsce88
- SHA256 5af66372e4eb5fcc9ab55c166891b2a586543124f05fc7e8c2360e9c20e0ef5b
Malware Config
Signatures
- Executes dropped EXE 6 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 9 IoCs
- Drops file in Program Files directory 64 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: LoadsDriver 2 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-04-03_e43635f48f64f6d6a1b6c80b63c36ec3_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-03_e43635f48f64f6d6a1b6c80b63c36ec3_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:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exeC:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- 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
-
C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\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
- Drops file in Program Files directory
-
\??\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
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
jmap.exe
jps.exe
jrunscript.exe
jsadebugd.exe
jstack.exe
jstat.exe
jstatd.exe
keytool.exe
kinit.exe
klist.exe
ktab.exe
native2ascii.exe
orbd.exe
pack200.exe
policytool.exe
dotnet.exe
DiagnosticsHub.StandardCollector.Service.exe
alg.exe
AppVClient.exe
office2016setup.exe
memory/728-251-0x0000000140000000-0x000000014022B000-memory.dmp
memory/728-61-0x00000000001A0000-0x0000000000200000-memory.dmp
memory/728-55-0x0000000140000000-0x000000014022B000-memory.dmp
memory/728-54-0x00000000001A0000-0x0000000000200000-memory.dmp
memory/1320-84-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/1320-254-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/1320-88-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/2780-79-0x0000000140000000-0x00000001401AA000-memory.dmp
memory/2780-75-0x0000000001690000-0x00000000016F0000-memory.dmp
memory/2780-72-0x0000000001690000-0x00000000016F0000-memory.dmp
memory/2780-65-0x0000000001690000-0x00000000016F0000-memory.dmp
memory/2780-66-0x0000000140000000-0x00000001401AA000-memory.dmp
memory/2784-36-0x0000000140000000-0x0000000140237000-memory.dmp
memory/2784-49-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/2784-38-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/2784-50-0x00000000007E0000-0x0000000000840000-memory.dmp
memory/2784-250-0x0000000140000000-0x0000000140237000-memory.dmp
memory/3524-29-0x0000000000680000-0x00000000006E0000-memory.dmp
memory/3524-243-0x0000000140000000-0x0000000140189000-memory.dmp
memory/3524-32-0x0000000140000000-0x0000000140189000-memory.dmp
memory/3524-45-0x0000000000680000-0x00000000006E0000-memory.dmp
memory/3600-20-0x0000000000500000-0x0000000000560000-memory.dmp
memory/3600-12-0x0000000000500000-0x0000000000560000-memory.dmp
memory/3600-13-0x0000000140000000-0x000000014018A000-memory.dmp
memory/3600-82-0x0000000140000000-0x000000014018A000-memory.dmp
memory/4468-31-0x0000000140000000-0x00000001401DF000-memory.dmp
memory/4468-0-0x0000000000920000-0x0000000000980000-memory.dmp
memory/4468-7-0x0000000000920000-0x0000000000980000-memory.dmp
memory/4468-2-0x0000000140000000-0x00000001401DF000-memory.dmp