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Analysis
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max time kernel
108s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
05/04/2024, 19:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe
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Size
42KB
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MD5
d9b30c92f2c7f92a666c702d572e6a73
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SHA1
1d804c3d966caa28db785c08132494d5b13553cc
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SHA256
49c523fcbd9807019b7341e8adf9968bd40821a9170c9b87427c2f24a47655c2
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SHA512
4fb9304b4aadfe05bf3402b8343f3ea49d71f3b575064a5bc97802391f35f2d7933c4d11e92b9555cd4cef89ca92ce98babf02f9442ee44c48057bedbac63bdb
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SSDEEP
768:bAvJCYOOvbRPDEgXrNekd7l94i3p+OMD6:bAvJCF+RQgJeab4sxR
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000800000002330a-12.dat CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation 2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation demka.exe -
Executes dropped EXE 1 IoCs
pid Process 1488 demka.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4436 wrote to memory of 1488 4436 2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe 93 PID 4436 wrote to memory of 1488 4436 2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe 93 PID 4436 wrote to memory of 1488 4436 2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-05_d9b30c92f2c7f92a666c702d572e6a73_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4436 -
C:\Users\Admin\AppData\Local\Temp\demka.exe"C:\Users\Admin\AppData\Local\Temp\demka.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1488
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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 --no-appcompat-clear --mojo-platform-channel-handle=4072 --field-trial-handle=2284,i,2771196087253062161,8107167670425198948,262144 --variations-seed-version /prefetch:81⤵PID:2248
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
42KB
MD5b21941ee190c52f77ee830bc21cd2d4c
SHA1fcb027dd7cd8c42fc13dd6eabf9903c0c32e7503
SHA2568009709c6beb9cbc47c08ca73d9753fe62b2fbf150b7aac22427bcf24efb8f5b
SHA512757a85b1fb74c954da15c09154f7418a431c572299b9274d042c928853b65acb251b97e58a5b522ce2c44831b9aa5f58384785c325d9061c0af2edd45ecb0756