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Analysis
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max time kernel
140s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
02/05/2024, 02:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe
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Size
44KB
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MD5
39c684f4f09f512f4fa3efb9e223238b
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SHA1
dd5d30076022acff1ce1ecc0771b49ad7ca470dc
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SHA256
743b95391604ece4eb58acbce54432d159272149457493e53e351cedeadc358d
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SHA512
60c9f75c19c6b269e0d35d686e3a4f5832aa1d99eb7bbdccdc167a2397daac3bed0fa8e55ce15523f0d0ec2f98bff06ece5eac5e0716c563d0f88cf1e267198b
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SSDEEP
768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3KxK:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XX
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000c000000023b54-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000c000000023b54-12.dat CryptoLocker_set1 -
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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation 2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 1776 hurok.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 1984 wrote to memory of 1776 1984 2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe 84 PID 1984 wrote to memory of 1776 1984 2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe 84 PID 1984 wrote to memory of 1776 1984 2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-02_39c684f4f09f512f4fa3efb9e223238b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1984 -
C:\Users\Admin\AppData\Local\Temp\hurok.exe"C:\Users\Admin\AppData\Local\Temp\hurok.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1776
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD5b0bd50430677b1df48ea927ddd617f92
SHA1aaf598715067357cd130353804cd4e8f999c3a9c
SHA25675a6f4717a682d4bc9ad07d28f862b03043b896eff23b25a382ac14c66b9ef56
SHA512a17429ccc7993e74d6b4a3454f8bc9eb5b065ec8409a8bb048a07c944a742c532d3c24f8e8990f1ef47778b425abf955077c492ea5781b34b45b1480f43a069e