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Analysis
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max time kernel
92s -
max time network
116s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
24/02/2024, 07:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe
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Size
63KB
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MD5
ea5df75e26e4009ac2dea79df15e60e3
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SHA1
e5ed3557f6990f4a410c5f0c9a5927c57f11770a
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SHA256
11e640d2964de9429f45e2d9e0df6bb542af42eed8c91b97e8e57c6ecc48c34b
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SHA512
76a5dd551b97afb3e79041b6c901768572c56c17210a48b12be2f2f41a6368ec9f774d85d5711ce2d64079ee97b68fbfe5d6ae574ae346b802593483043b53af
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SSDEEP
1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1x/9lfL+gniDSZp3:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7S
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000300000001fc40-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000300000001fc40-12.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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation 2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 3312 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 1564 wrote to memory of 3312 1564 2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe 88 PID 1564 wrote to memory of 3312 1564 2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe 88 PID 1564 wrote to memory of 3312 1564 2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-24_ea5df75e26e4009ac2dea79df15e60e3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1564 -
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:3312
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
63KB
MD54bcb8b9095ccda0c990f158ba68e96d4
SHA1249e400a78625a57f5454b8b0f187fd3d16ec80b
SHA256f2e60162cb5d181b96fe0ee57a6d830087bbba3254a88eeed72ef405e2cfc1ae
SHA512170d96bfef2f607de47d3749e5e7246753ed5b61e81e35303cff67f1e85c9d3d0d87ee6775bcc5f5b31bb36285638400fc3ae6cb31460c44f61e52b13b04ac5d