42c884f1595cdf0b00760519c9a63c404f628f8e773e3173f2a47e4393452b1a

Analysis

max time kernel
161s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11-01-2024 05:59

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
Size

1.7MB
MD5

fda3b583f9ce8e11896b603a1fbd2b6e
SHA1

8186d3d9599f9fab538ce25b0e86d4d15ab2f64c
SHA256

42c884f1595cdf0b00760519c9a63c404f628f8e773e3173f2a47e4393452b1a
SHA512

80fa14a42897f9120fc315743d8c2ece59577f65ea4a38bce7b015b4997213b0f71e23c76ab6211216a3cfbd8a81c38d3bf3172ca80c6359e32e3dd04f64f329
SSDEEP

49152:T4f65cTlG8mMHcn3obb0P8/snji6attJM:TSG8mM8wEnW6at

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 7 IoCs

pid	Process
1376	alg.exe
1296	DiagnosticsHub.StandardCollector.Service.exe
3216	fxssvc.exe
3004	elevation_service.exe
3220	elevation_service.exe
3828	maintenanceservice.exe
4720	OSE.EXE

Drops file in System32 directory 9 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\AppVClient.exe	alg.exe
File opened for modification	C:\Windows\system32\dllhost.exe	alg.exe
File opened for modification	C:\Windows\system32\AppVClient.exe	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
File opened for modification	C:\Windows\system32\config\systemprofile\AppData\Roaming\2079f35fc92b1ccd.bin	alg.exe
File opened for modification	C:\Windows\system32\dllhost.exe	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
File opened for modification	C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
File opened for modification	C:\Windows\system32\fxssvc.exe	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
File opened for modification	C:\Windows\system32\fxssvc.exe	alg.exe
File opened for modification	C:\Windows\System32\alg.exe	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Internet Explorer\ExtExport.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\rmiregistry.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\servertool.exe	alg.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	alg.exe
File opened for modification	C:\Program Files\Internet Explorer\iediagcmd.exe	alg.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\jp2launcher.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Eula.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\appletviewer.exe	alg.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jstatd.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\unpack200.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\servertool.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jabswitch.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\32BitMAPIBroker.exe	alg.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jstat.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\klist.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\ktab.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\firefox.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Browser\WCChromeExtn\WCChromeNativeMessagingHost.exe	alg.exe
File opened for modification	C:\Program Files\Internet Explorer\iexplore.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jconsole.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javaws.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\updater.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jcmd.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\kinit.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\keytool.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\policytool.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\default-browser-agent.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jabswitch.exe	alg.exe
File opened for modification	C:\Program Files\dotnet\dotnet.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\idlj.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\kinit.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrServicesUpdater.exe	alg.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\MSInfo\msinfo32.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javapackager.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\rmid.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\tnameserv.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\pingsender.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroTextExtractor.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\arh.exe	alg.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\chrome_proxy.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jps.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jdb.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\javaws.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\keytool.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\java.exe	alg.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc-cache-gen.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe	alg.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOInstaller.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javadoc.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javah.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	alg.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32Info.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\extcheck.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\pack200.exe	alg.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsgen.exe	alg.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsimport.exe	alg.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\rmiregistry.exe	alg.exe
File opened for modification	C:\Program Files\Mozilla Firefox\minidump-analyzer.exe	alg.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@fxsresm.dll,-1134 = "Microsoft Routing Extension"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@fxsresm.dll,-1131 = "Route through e-mail"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@fxsresm.dll,-1132 = "Store in a folder"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@fxsresm.dll,-1133 = "Print"	fxssvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@fxsresm.dll,-1130 = "Microsoft Modem Device Provider"	fxssvc.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
668	Process not Found
668	Process not Found

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeTakeOwnershipPrivilege	1128	2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
Token: SeAuditPrivilege	3216	fxssvc.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-10_fda3b583f9ce8e11896b603a1fbd2b6e_ryuk.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
PID:1128

C:\Windows\System32\alg.exe
C:\Windows\System32\alg.exe
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Drops file in Program Files directory
PID:1376

C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe
C:\Windows\system32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe
1⤵
- Executes dropped EXE
PID:1296

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -p -s TapiSrv
1⤵
PID:1136

C:\Windows\system32\fxssvc.exe
C:\Windows\system32\fxssvc.exe
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:3216

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
PID:3004

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
PID:3220

C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
"C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
1⤵
- Executes dropped EXE
PID:3828

\??\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
PID:4720

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\elevation_service.exe

Filesize
2.1MB

MD5
05233a328f660a8c419bd18b44571d70

SHA1
f43d53cae6edb091fc2c2bdd473da95a6e824f38

SHA256
65c6caae15f2de283e7b4ddeb7fa727443e40cc12aaf575df08899ad141fa67b

SHA512
8d27e69a6b90debda94688e0347c945303ad031cd86ec27e034fe16698a6e781f7b4d2878ddcd9515b7eed963389c88b0650dcc7f1a4e2e3f911198a8746e5d7

Download Submit
C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe

Filesize
1.3MB

MD5
d3bc9f3c599ecc23eda66cae9c449fd1

SHA1
cc09954b6cec48eaea25599978244b764a2d30e1

SHA256
3ca49266ae1372be899d2e654779b70eb1def02543f1c21e57ff7b6b5288c316

SHA512
7102f2ee3ba2b1c24c4c1310e25aff760e4297d75b9cf64b51b6771d82166bb51a87cc21c2d56ee333acb868b57a1fbb02993e122cefa3ea80b17ef80d824c72

Download Submit
C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE

Filesize
1.3MB

MD5
4ce41645f05bd9b0b51925264586ec93

SHA1
f0d31eab5f229084a5915172c78d67ccbe887449

SHA256
2ec5e32edfba7272f710f7c52cb9562bbfad4e970418f1d9bb7076ef58a993ac

SHA512
943147276a5794c7c0816ba0bdaf4e300a3a653b3952679dbc6e7ee97b777a5a246b17b953b6a3982bd56b74b2e4da0ea0ea228e39af25cc5161ad8e4e904566

Download Submit
C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe

Filesize
2.1MB

MD5
76dd801178d394f2c71ebeccc8904561

SHA1
56371d6c07ae5082d26133990fcaedea9ba6d39c

SHA256
b3517375902f2d6a4405b5fb787666cebe2b31f301e7a2c2b03a58b940e32a86

SHA512
16fc33aaada96dfd0a2826250f0ac6375b4a922c4f64886ce559b148332bd66cb3f1da4d3332ae1b0e6464f7ca555d0c04e2843fd687758e5934cf4c52d9c7dd

Download Submit
C:\Windows\System32\DiagSvcs\DiagnosticsHub.StandardCollector.Service.exe

Filesize
1.2MB

MD5
45865c33dbd7e483a6c9a6a88bff9b1b

SHA1
5acf4d1449f676dae3c8a6460dc94940937a8c95

SHA256
d7ea7d6844d1fbb8e603c9822a8ecd9b3f78ca665ef7b4cc08c1a2f1c2c1804d

SHA512
d2f052705e01262f1e67ac44325c82e71ff1f32f08fdf710463dfa05436147ac36b6b65b17a0d7e616f5edf8d68b26fa58565f0aa5aebc054ab01ba0a864200f

Download Submit
C:\Windows\System32\FXSSVC.exe

Filesize
1.2MB

MD5
669c38489b96b523ddd674d7e242ea4a

SHA1
bab85c0fad5b7194e72b268d2233660a2c2bcced

SHA256
9460cc06b04133d43f08248f4cb0c136438428295663d37bfe99674707897e8c

SHA512
96c7cfd048e6a6493e152e5910aab8ce6c043d57b7a4268601b96a3ff4a8b34941692718e32ad1a49a56cd072c006ccff9522032aaed14f8f9eba957ca37165b

Download Submit
C:\Windows\System32\alg.exe

Filesize
1.2MB

MD5
63cba65b27787b942501886552357add

SHA1
f88b016936d4a96100ce68d0ac3cc13dd0076429

SHA256
f8783604c4c7f3908a9af443040ea3cc4d7a6a5e19d43b9b4d19e191372af7ba

SHA512
8ca6619b78c1fe8a92d4cb96f7a2872c4d4d751cac06ce6f18bbed8b1ae583e3558c618cf188c588945e774ec91004c6f826710af124a6f3d16c2962dce9e0b4

Download Submit
C:\Windows\system32\AppVClient.exe

Filesize
1.3MB

MD5
e583296a4091e41ae85acabc72a4bde0

SHA1
5bf11737218dac06ba1ba97f00474ca69e6fa8b7

SHA256
494483ca594bb0fb3f99db6e6c5d867a885eb9410f8e80469dc27bf9d32d6d6a

SHA512
6e9ffaf74f1943d0e1e7d7518e05f13eecbac7ecbff056c6c5eb28ce57286c27221089b94d841f53394a6d7e9255b2e7ec0206149e90d4f4c78a2845e74f9fc3

Download Submit
memory/1128-7-0x0000000000710000-0x0000000000770000-memory.dmp

Filesize
384KB

Download
memory/1128-8-0x0000000000710000-0x0000000000770000-memory.dmp

Filesize
384KB

Download
memory/1128-1-0x0000000000710000-0x0000000000770000-memory.dmp

Filesize
384KB

Download
memory/1128-39-0x0000000140000000-0x00000001401CF000-memory.dmp

Filesize
1.8MB

Download
memory/1128-56-0x0000000140000000-0x00000001401CF000-memory.dmp

Filesize
1.8MB

Download
memory/1128-0-0x0000000140000000-0x00000001401CF000-memory.dmp

Filesize
1.8MB

Download
memory/1296-34-0x00000000006C0000-0x0000000000720000-memory.dmp

Filesize
384KB

Download
memory/1296-26-0x0000000140000000-0x0000000140135000-memory.dmp

Filesize
1.2MB

Download
memory/1296-62-0x0000000140000000-0x0000000140135000-memory.dmp

Filesize
1.2MB

Download
memory/1296-27-0x00000000006C0000-0x0000000000720000-memory.dmp

Filesize
384KB

Download
memory/1376-51-0x0000000140000000-0x0000000140136000-memory.dmp

Filesize
1.2MB

Download
memory/1376-14-0x0000000000740000-0x00000000007A0000-memory.dmp

Filesize
384KB

Download
memory/1376-20-0x0000000000740000-0x00000000007A0000-memory.dmp

Filesize
384KB

Download
memory/1376-13-0x0000000140000000-0x0000000140136000-memory.dmp

Filesize
1.2MB

Download
memory/3004-60-0x0000000000CB0000-0x0000000000D10000-memory.dmp

Filesize
384KB

Download
memory/3004-59-0x0000000140000000-0x0000000140237000-memory.dmp

Filesize
2.2MB

Download
memory/3004-68-0x0000000000CB0000-0x0000000000D10000-memory.dmp

Filesize
384KB

Download
memory/3004-114-0x0000000140000000-0x0000000140237000-memory.dmp

Filesize
2.2MB

Download
memory/3216-38-0x0000000140000000-0x0000000140135000-memory.dmp

Filesize
1.2MB

Download
memory/3216-50-0x0000000140000000-0x0000000140135000-memory.dmp

Filesize
1.2MB

Download
memory/3216-48-0x0000000000EA0000-0x0000000000F00000-memory.dmp

Filesize
384KB

Download
memory/3216-46-0x0000000000EA0000-0x0000000000F00000-memory.dmp

Filesize
384KB

Download
memory/3216-40-0x0000000000EA0000-0x0000000000F00000-memory.dmp

Filesize
384KB

Download
memory/3220-73-0x0000000140000000-0x000000014022B000-memory.dmp

Filesize
2.2MB

Download
memory/3220-79-0x00000000001A0000-0x0000000000200000-memory.dmp

Filesize
384KB

Download
memory/3220-72-0x00000000001A0000-0x0000000000200000-memory.dmp

Filesize
384KB

Download
memory/3220-118-0x0000000140000000-0x000000014022B000-memory.dmp

Filesize
2.2MB

Download
memory/3828-83-0x0000000000CD0000-0x0000000000D30000-memory.dmp

Filesize
384KB

Download
memory/3828-85-0x0000000140000000-0x0000000140156000-memory.dmp

Filesize
1.3MB

Download
memory/3828-90-0x0000000000CD0000-0x0000000000D30000-memory.dmp

Filesize
384KB

Download
memory/3828-93-0x0000000000CD0000-0x0000000000D30000-memory.dmp

Filesize
384KB

Download
memory/3828-95-0x0000000140000000-0x0000000140156000-memory.dmp

Filesize
1.3MB

Download
memory/4720-99-0x0000000140000000-0x000000014015B000-memory.dmp

Filesize
1.4MB

Download
memory/4720-98-0x00000000007D0000-0x0000000000830000-memory.dmp

Filesize
384KB

Download
memory/4720-106-0x00000000007D0000-0x0000000000830000-memory.dmp

Filesize
384KB

Download
memory/4720-120-0x0000000140000000-0x000000014015B000-memory.dmp

Filesize
1.4MB

Download