Analysis
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max time kernel
133s -
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
08/05/2024, 03:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe
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Size
50KB
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MD5
487acf2ae809cd6f0b91cd5426ffbadd
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SHA1
f57fc1bf16fd1ddcfe104acbc4d05e196bbe0a33
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SHA256
3927cd46077cb6392960d3f4449b2f6f35bbd39cd86fa32341a0c38e1ed29ed2
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SHA512
61ba8858390f6cff89979c7071936b5cb54fa9222e90cae83808f8a213a56e84c9f3f6847e8e593a5e5c788a85e6765c69371cd79a596ab0d0fad0a6d0d0564f
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SSDEEP
1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIC0e:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7F
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000d000000023b25-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000d000000023b25-12.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 2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_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 2036 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 1464 wrote to memory of 2036 1464 2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe 83 PID 1464 wrote to memory of 2036 1464 2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe 83 PID 1464 wrote to memory of 2036 1464 2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-08_487acf2ae809cd6f0b91cd5426ffbadd_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1464 -
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:2036
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
50KB
MD55cf2e3540089adb0dc1c8c4b3fcce798
SHA1c8757c142ae9fa370ae98b622a4757c78a9ca129
SHA25600202149343100e4959ddad9bc3711ae251f4e18ffa26a064a45ca5872dbd3e1
SHA512bb446c8870125955a7b0f9d62d101bd98e247480639b99748f65470e0876e0373df57547ffa3a01e64d4107c869e0e4050875052ea610fef3e690ada2b7b8b16