Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
20/02/2024, 01:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe
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Size
30KB
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MD5
1f70d10feb59a8aa2412c852bdc3deea
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SHA1
e63d0494f6b086aac1623af56794e7b8daa1098f
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SHA256
145633926f053d37dc5d7d555d444d310e10cbf298f589457a2bcca5eb196860
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SHA512
b54cd3b4fce2b88fddc5a40bfe0d06ef123479588b84593db0a73e1380097ca77df545f425daf9c03af0d27ad9e8e2a9756b96ab2af8dc3bd1977f0cf6e8d1c9
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SSDEEP
384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9RXmo:b7o/2n1TCraU6GD1a4Xt9Rt
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00070000000231ff-12.dat 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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4060 rewok.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 752 wrote to memory of 4060 752 2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe 85 PID 752 wrote to memory of 4060 752 2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe 85 PID 752 wrote to memory of 4060 752 2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_1f70d10feb59a8aa2412c852bdc3deea_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:752 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:4060
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
31KB
MD5dad86d97a4aeb071d22236697db36c05
SHA14f618dc4b8a609918d2f7bb320d94ae49aa6183f
SHA25600c02b2f8cb57678c511a7266514db0b42a85e84df47d1634b1ac7f6120b2bea
SHA51203dde01a72f640d1f31557c6600e18c3be0bda35f1b5cfcc2b4d0a334d401009f643954e58d3ac30b73bdd934091ca967a2b42fdfd948d4fb957d480d1008a00