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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
08/09/2024, 07:36
Behavioral task
behavioral1
Sample
2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe
Resource
win7-20240708-en
General
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Target
2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe
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Size
80KB
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MD5
c106e4f7aa7908e7bf9062fb3216d4cd
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SHA1
26d8e159bb19fa7ec1a94114f47287256fbb91e1
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SHA256
43d6391abac98e884119d61016e161852ed72e1ec3358a6ca41faa0301930bca
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SHA512
a6dc0b9ff864fcfe07914b15db567dad299a6a0249e25fd06724acc9f1b523167d601e68a24bdd4dfe1f363b28d996478945362e4a6722e86c609a43c579fbf7
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqdo:T6a+rdOOtEvwDpjNcB
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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation 2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2560 asih.exe -
resource yara_rule behavioral2/memory/2752-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000900000002348b-13.dat upx behavioral2/memory/2752-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 2 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 asih.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2752 wrote to memory of 2560 2752 2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe 85 PID 2752 wrote to memory of 2560 2752 2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe 85 PID 2752 wrote to memory of 2560 2752 2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-09-08_c106e4f7aa7908e7bf9062fb3216d4cd_cryptolocker.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2752 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2560
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
81KB
MD544715fbdf5efab02ee428f63b5744023
SHA1f2967c0d8408f7a440dbbb1ffb36cbb98e1a855a
SHA25670c4db23aac88c384579dd9359f5018e8204d41cd8a2d53ee3b5433b82e0aa35
SHA5123725cce1866b4f7b480109542b1a552ce4b5ea928008b833a9971b2365339e9dc57c957f715c6fcdf15fa47a02660fcb30c68e3fb85a13863cb24f3c19429a59