Analysis
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max time kernel
142s -
max time network
134s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
31/05/2024, 22:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe
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Size
38KB
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MD5
1ce2c0b8d77ffd13653c5afa634f114f
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SHA1
7eb4c6b3b0dad1aed49bae1b74ab78a167016150
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SHA256
bc186dcdae8446dad85fc97639773988ef18461d3b8189e8194cea610bf37bfa
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SHA512
f5b72682d5d2fdd56be74b97de6884d80b4bf98a1ab81c0df4a8facade074f9423ca99d23eca325c22198c09d3c9d239ed5f494b7c2192a3fdd6c5edfa828cf8
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SSDEEP
768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGp/YIm7wm0WZyZ:o1KhxqwtdgI2MyzNORQtOflIwoHNV2X3
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000022f51-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x0008000000022f51-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 1320 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 3580 wrote to memory of 1320 3580 2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe 82 PID 3580 wrote to memory of 1320 3580 2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe 82 PID 3580 wrote to memory of 1320 3580 2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-31_1ce2c0b8d77ffd13653c5afa634f114f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3580 -
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:1320
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5c1d095af0b46a5ccb43fec70eac0c75f
SHA108f211b69dbd49cf4d94b5b31918cff06f1b15f4
SHA25689dc2ea3a8da23b28c8e5a2d4928041c9ee46a9b9472afa4f56ccef4464f7d82
SHA51221a3737bf9f23e93fe2f1fa8c1d11c306dad1c4a7554388adadef7363e0a2dbae9a23fe375ae79a6faa88c7b4a694b74ecd1bdebd99171d2da3c67b898068e24