Analysis
- max time kernel
6s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
08/06/2024, 19:57
General
- Target 2024-06-08_27b1273caf7c912fc3448978393f4afa_bkransomware.exe
- Size 1.8MB
- Sample240608-ypfmlsgb95
- SHA256 ba0f1c72b8b6ce68114d1559a521d0e7eb6a407ec0cac6b3e287224bd17e6e5c
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 18 IoCs
- Suspicious behavior: LoadsDriver 2 IoCs
- Suspicious use of AdjustPrivilegeToken 37 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\2024-06-08_27b1273caf7c912fc3448978393f4afa_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_27b1273caf7c912fc3448978393f4afa_bkransomware.exe"1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\System32\alg.exeC:\Windows\System32\alg.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
-
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:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"1⤵
- Executes dropped EXE
-
C:\Program Files (x86)\Microsoft\Edge\Application\124.0.2478.80\elevation_service.exe"C:\Program Files (x86)\Microsoft\Edge\Application\124.0.2478.80\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:\Windows\System32\msdtc.exeC:\Windows\System32\msdtc.exe1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Windows 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
-
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" 0 916 920 928 8192 924 8962⤵
-
-
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 --field-trial-handle=4080,i,15140928051103392835,1612840580898364401,262144 --variations-seed-version --mojo-platform-channel-handle=4376 /prefetch:81⤵
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
wmpnetwk.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
AppVClient.exe
SgrmBroker.exe
msiexec.exe
memory/368-128-0x0000000000400000-0x0000000000577000-memory.dmp
memory/404-21-0x0000000140000000-0x000000014018A000-memory.dmp
memory/404-22-0x00000000006F0000-0x0000000000750000-memory.dmp
memory/404-127-0x0000000140000000-0x000000014018A000-memory.dmp
memory/404-12-0x00000000006F0000-0x0000000000750000-memory.dmp
memory/804-71-0x0000000140000000-0x0000000140267000-memory.dmp
memory/804-178-0x0000000140000000-0x0000000140267000-memory.dmp
memory/804-69-0x0000000000890000-0x00000000008F0000-memory.dmp
memory/804-63-0x0000000000890000-0x00000000008F0000-memory.dmp
memory/1104-581-0x0000000140000000-0x00000001401A6000-memory.dmp
memory/1104-259-0x0000000140000000-0x00000001401A6000-memory.dmp
memory/1172-98-0x0000000140000000-0x0000000140199000-memory.dmp
memory/1172-89-0x00000000006A0000-0x0000000000700000-memory.dmp
memory/1380-239-0x0000000140000000-0x0000000140216000-memory.dmp
memory/1380-576-0x0000000140000000-0x0000000140216000-memory.dmp
memory/2160-190-0x0000000140000000-0x00000001401C2000-memory.dmp
memory/2160-571-0x0000000140000000-0x00000001401C2000-memory.dmp
memory/2540-116-0x0000000140000000-0x000000014018B000-memory.dmp
memory/2540-235-0x0000000140000000-0x000000014018B000-memory.dmp
memory/2780-84-0x0000000000C00000-0x0000000000C60000-memory.dmp
memory/2780-75-0x0000000000C00000-0x0000000000C60000-memory.dmp
memory/2780-74-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/2780-86-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/2780-81-0x0000000000C00000-0x0000000000C60000-memory.dmp
memory/2800-256-0x0000000140000000-0x0000000140175000-memory.dmp
memory/2800-131-0x0000000140000000-0x0000000140175000-memory.dmp
memory/2816-562-0x0000000140000000-0x0000000140169000-memory.dmp
memory/2816-166-0x0000000140000000-0x0000000140169000-memory.dmp
memory/2956-416-0x0000000140000000-0x0000000140176000-memory.dmp
memory/2956-162-0x0000000140000000-0x0000000140176000-memory.dmp
memory/2964-271-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/2964-570-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/2964-150-0x0000000140000000-0x00000001401D7000-memory.dmp
memory/3212-566-0x0000000140000000-0x00000001401E2000-memory.dmp
memory/3212-187-0x0000000140000000-0x00000001401E2000-memory.dmp
memory/3364-236-0x0000000140000000-0x00000001401FC000-memory.dmp
memory/3364-575-0x0000000140000000-0x00000001401FC000-memory.dmp
memory/3388-97-0x0000000000400000-0x00000000005D9000-memory.dmp
memory/3388-8-0x0000000002210000-0x0000000002277000-memory.dmp
memory/3388-7-0x0000000000400000-0x00000000005D9000-memory.dmp
memory/3388-0-0x0000000002210000-0x0000000002277000-memory.dmp
memory/3856-44-0x0000000000EA0000-0x0000000000F00000-memory.dmp
memory/3856-38-0x0000000000EA0000-0x0000000000F00000-memory.dmp
memory/3856-37-0x0000000140000000-0x0000000140135000-memory.dmp
memory/3856-49-0x0000000140000000-0x0000000140135000-memory.dmp
memory/3856-50-0x0000000000EA0000-0x0000000000F00000-memory.dmp
memory/4076-165-0x0000000140000000-0x000000014024B000-memory.dmp
memory/4076-52-0x0000000000510000-0x0000000000570000-memory.dmp
memory/4076-58-0x0000000000510000-0x0000000000570000-memory.dmp
memory/4076-60-0x0000000140000000-0x000000014024B000-memory.dmp
memory/4144-32-0x0000000000730000-0x0000000000790000-memory.dmp
memory/4144-35-0x0000000140000000-0x0000000140189000-memory.dmp
memory/4144-26-0x0000000000730000-0x0000000000790000-memory.dmp
memory/4432-582-0x0000000140000000-0x0000000140179000-memory.dmp
memory/4432-272-0x0000000140000000-0x0000000140179000-memory.dmp
memory/4576-110-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/4576-215-0x0000000140000000-0x00000001401AF000-memory.dmp
memory/4628-209-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/4628-213-0x0000000140000000-0x00000001401C0000-memory.dmp
memory/4700-574-0x0000000140000000-0x0000000140147000-memory.dmp
memory/4700-216-0x0000000140000000-0x0000000140147000-memory.dmp