Analysis
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max time kernel
142s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 02:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe
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Size
50KB
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MD5
a8c588e03ecb3646f5f3fd763aedd801
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SHA1
42a8da3389e3345e1e93737eeac373f61346a4d4
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SHA256
09da49c224362ada42401cb498b51ded042b803df53447a443a4fc1bfc97f17c
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SHA512
2527a64a1408c2a91b56aab676e8c11c114c71350cabe2609676de30d9eaa1f45bb2f3567f2a5461e8521066ccac5611731b9df083879758b21e3085a775bd23
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vdXfm6:X6QFElP6n+gJBMOtEvwDpjBtEdXfd
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000800000002323a-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000800000002323a-12.dat CryptoLocker_set1 -
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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4692 asih.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 652 wrote to memory of 4692 652 2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe 90 PID 652 wrote to memory of 4692 652 2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe 90 PID 652 wrote to memory of 4692 652 2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_a8c588e03ecb3646f5f3fd763aedd801_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:652 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4692
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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=1420 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:81⤵PID:2204
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
50KB
MD552799cfa88f102f30001567ecf1c56e9
SHA1f55583bd76d5dc8248b1816f909fcbe7d479f62e
SHA25681b0475007c49491b2d92732ad936d8958fb7d087cec766126f36fdeafffbd6d
SHA5124d22ea0d5d8e1e78d0b259567d7f34343b1025b2e4db89375f65e682696db8da0c238c6143984c14813aa087e5ed99d75396b6bd79ba4702cf9dfb687ac6c47b