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Analysis
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max time kernel
150s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
15/09/2024, 00:51
Static task
static1
Behavioral task
behavioral1
Sample
2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe
Resource
win10v2004-20240802-en
General
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Target
2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe
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Size
3.0MB
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MD5
8811c4e1059f777427499d52e475bddb
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SHA1
3a5d39a67f46afbb7642868f52cb98be0c467ac0
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SHA256
31b4c9317ee5f1d80b2e9ed56798d735311944d78ae26e33b527388b460c2e68
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SHA512
792f74d016b3ceef9bef0bb6ab607fdf22c5b55c5b3953f87168402beafd8b94bd60e1ca5ac990c0e0a86c76699f8a5d40b7393693c468150954e4bc52867338
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SSDEEP
98304:Kj0zPu9LbmxCb6ib4WraIox9XcQiNE6ZHopCFeUg:KjpBBWIox9XcAqHUCDg
Malware Config
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation 2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe -
Executes dropped EXE 2 IoCs
pid Process 3704 Auto.exe 456 StartAllBackCfg.exe -
Loads dropped DLL 1 IoCs
pid Process 456 StartAllBackCfg.exe -
AutoIT Executable 1 IoCs
AutoIT scripts compiled to PE executables.
resource yara_rule behavioral2/files/0x0007000000023402-124.dat autoit_exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Auto.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3704 Auto.exe -
Suspicious use of FindShellTrayWindow 64 IoCs
pid Process 3704 Auto.exe 3704 Auto.exe 456 StartAllBackCfg.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe -
Suspicious use of SendNotifyMessage 64 IoCs
pid Process 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe 3704 Auto.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 1820 wrote to memory of 3704 1820 2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe 83 PID 1820 wrote to memory of 3704 1820 2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe 83 PID 1820 wrote to memory of 3704 1820 2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe 83 PID 3704 wrote to memory of 456 3704 Auto.exe 87 PID 3704 wrote to memory of 456 3704 Auto.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-09-15_8811c4e1059f777427499d52e475bddb_ryuk.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1820 -
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Auto.exe"C:\Users\Admin\AppData\Local\Temp\RarSFX0\Auto.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3704 -
C:\Users\Admin\AppData\Local\Temp\RarSFX0\StartAllBackCfg.exeStartAllBackCfg.exe /install3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
PID:456
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
846KB
MD5149034d4a5d59769062fb576f051d092
SHA18e4fce741e80828d4af046f1980186b7d652c0f6
SHA25602213a2e40dd90a251b27566b7ffb25155368a418b67047096924aafec918cd9
SHA5122b51f9c16db5947f9a6e822582b36da2e0d6eb74431a9f843c30a406ad3b1756324f0e3dc3e44525fb6dd832c2aa573ed678f5f71627f6d9362717c311bac809
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Filesize
3.3MB
MD52e3d22d3ae68c0e91f33cd38bc102431
SHA17dc71b170c93b998cbf3392776f33d452e529171
SHA256b2ef66bd88251361c327d85d5b4ba25ddca942e391e854ac5121687c52a97706
SHA51257bb448a12529f523e0f0b8e4b417cd98584aa0fab62fed202410c8c4fd72e208468a878fdcced7605046a9338cf48fa26479cb6e769af846df4294396957c49
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Filesize
1016KB
MD596d52d4473352f108c5d68e3be3d7e85
SHA1af891af17e18894a25f119136282aea38056df62
SHA256c4de824fa579e00d95a26cd2761dba85e2306b90724f32b6f6cf994ba2a51f61
SHA512b6116d3380a6682c7b6d25d4e93556e4dc4e4f0203803a1fc0a8cdd6c45136b2b97559ed875740c2d3b3c2b4539576bbf4f529c71f578eb68bfe2980a1977519