Analysis
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max time kernel
141s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 20:20
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe
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Size
45KB
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MD5
ca8125d134368e8425615af217810053
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SHA1
faccaa28a06e97f2a54766936943dcaa8181522f
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SHA256
31985fdc1d83abf62161b15fe814e6698326dfac59fb583695c43b240e7e8079
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SHA512
2702863fd682d4f9f78d7b96472d6e49bf26b4c75619527f72cf0eef0bc4eec566ee72c9a512984a86e59db10cb783110e80baf3ac9794a9e76bd716ecd0fcd2
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SSDEEP
768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLaHaMMm2X3rtLSvI:V6QFElP6n+gMQMOtEvwDpjyaHaXvOvI
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation 2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 4316 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
Processes:
2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exedescription pid process target process PID 2560 wrote to memory of 4316 2560 2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe asih.exe PID 2560 wrote to memory of 4316 2560 2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe asih.exe PID 2560 wrote to memory of 4316 2560 2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_ca8125d134368e8425615af217810053_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2560 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4316
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
45KB
MD55f9f17d5d680631da06e214f1178dac3
SHA1927558b5bf75ace3ee60c53385d3acbc6e0d8610
SHA256c35e78ba3808e87631bce149da1b4a363daed7100c70bd304937b86e0952d61c
SHA512f7f7483953b63c13bf0a424562fbe2a9efd6da43218add75fba2da17bf40be37f25ae4a622346788a95f6aa8dda0c5637c3fdd9e723d4d2deb8c9a5cf26617f1