Analysis
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max time kernel
153s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09/03/2024, 04:32
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe
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Size
41KB
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MD5
391f214fc4e56de2da8a8642385ff866
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SHA1
cf17f8892b046791d9b0d03a5043788e9d6b15b1
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SHA256
91373d2c09bbfbf7784ea38c9c68fddad2d2f5e578477e076ddfc140c88ff6de
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SHA512
e93f88bf5b7b8f31db558407573e6aaad8e4a753fe4506fa2d41c4778a5f7dab93a2c88345750ac6b25858ba5c8af8b3743f1ef6a4b4b27d208e7f8768ef5233
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SSDEEP
384:bAvMaNGh4z7CG3POOvbRSLoF/F0QU5XYFnufc/zzoiM8Nekdvjl9V50i3NbZM+iv:bAvJCYOOvbRPDEgXrNekd7l94i3p+b
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000023255-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation demka.exe -
Executes dropped EXE 1 IoCs
pid Process 3752 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 1128 wrote to memory of 3752 1128 2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe 100 PID 1128 wrote to memory of 3752 1128 2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe 100 PID 1128 wrote to memory of 3752 1128 2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-09_391f214fc4e56de2da8a8642385ff866_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1128 -
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:3752
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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=3744 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:81⤵PID:1384
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5edb7f5393757c9048cae4d0ceac5aaa0
SHA1428600dcbdeb9bcc4924e6735f7647375a7400a8
SHA2569e685d488ffe219883ca99191497c08725b56d6bcde6fc1da0dd7534f46242ba
SHA5121f21fc46f02b452ff0b723af10336788ab2ab4b4005ac961ae58f84063e3127a25a4c182f525824fc8ec0a790451c56bcc2a19b00b7932bb09dc61741ea8c3ae