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Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
21/09/2024, 00:47
Behavioral task
behavioral1
Sample
2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe
Resource
win7-20240903-en
General
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Target
2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe
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Size
88KB
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MD5
6a9a47cd329b8516a247f8d6cafc7653
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SHA1
9096a6507e58c4d284ccf06ef7e792733607af25
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SHA256
e10c62009239fb57a37399d4aaffd25c288ff81e91e0221c754e1a4e0e5bab45
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SHA512
67851520f40be13e098750f5da68c553054914b4d6ec0f027deea8d9f39035121a544a79ae5de6d625ba3da35461664b2ba4c9a8088956807d0ac4f42bf21f87
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vM5RH:T6a+rdOOtEvwDpjNm
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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation 2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4492 asih.exe -
resource yara_rule behavioral2/memory/2816-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000f000000023370-13.dat upx behavioral2/memory/2816-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4492-26-0x0000000000500000-0x0000000000510000-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 2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language asih.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2816 wrote to memory of 4492 2816 2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe 91 PID 2816 wrote to memory of 4492 2816 2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe 91 PID 2816 wrote to memory of 4492 2816 2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-09-21_6a9a47cd329b8516a247f8d6cafc7653_cryptolocker.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2816 -
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:4492
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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 --field-trial-handle=4160,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=3820 /prefetch:81⤵PID:1948
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
88KB
MD5c9f869320be603f5b3a5f115239365b7
SHA1b81c71c0bf5767c8ddffecc4fa73654ca147cf40
SHA256aa82da5892e48f32032d1df4d1f28a13a736e98fcafb31b02560d52dde60d18e
SHA5120e578233613637ea7222d9426dc3b1e778912bb3dffe7cde7b83d735c41c894810587d9b7b429b483a0b2c9198416ce7030e967a0f0c0d6bb0293cb3a41c78d2