Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 00:52
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe
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Size
44KB
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MD5
d637fda51f8daec053be94aa950b4164
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SHA1
78a67ea5295edf7324798bd8484360d35c3b70f6
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SHA256
7ae98fdc18c70f3068057a52b7e72e74617c263f2f1fc57a889cc149540f9e9f
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SHA512
6a0a60749cf043d77f308e60222c2ca2f2a97baa48da87fb6e2e3ad41830e94a9c527cccd3f52989fd8bab69ba8589d0b29b3ce79308828310d56573182d151c
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SSDEEP
384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUpEui0UX:bm74zYcgT/Ekn0ryfjLuYX
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3368-0-0x0000000008000000-0x000000000800D000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023431-13.dat CryptoLocker_rule2 behavioral2/memory/3368-17-0x0000000008000000-0x000000000800D000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3980-26-0x0000000008000000-0x000000000800D000-memory.dmp CryptoLocker_rule2 -
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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation 2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3980 hasfj.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 3368 wrote to memory of 3980 3368 2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe 82 PID 3368 wrote to memory of 3980 3368 2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe 82 PID 3368 wrote to memory of 3980 3368 2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_d637fda51f8daec053be94aa950b4164_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3368 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:3980
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
45KB
MD5c42366fe7514fff2ea84ae61eaba2d1d
SHA1fbd78aeb838da4450602ff896748f26952e3cd52
SHA2562115928089ee463e18a025016ec21a151526c8ee0d11e193a8f0b7de5a832e8b
SHA512007859541ac72db95981767c15bcfb23cdebd60d498b5a50be36ac0e305db3396d7b951ad51e85e6bd7b45f11b2726949c0089dfbfc045d319cfc1b5012b9055