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Analysis
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max time kernel
138s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
24/01/2024, 08:43
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe
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Size
47KB
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MD5
f8e3c2de4fcd735db89322eccc30cb2a
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SHA1
5f6df22404ca1b48dc04a5b8f10651a28b06088e
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SHA256
24a4173724331b1fbdf97a83a2ae5179742ebeb9b41d88c3175882b94bc6ac85
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SHA512
dd2c57636d3ffe75d5d58f4ed52a2d57c309f6589009ca6d4905d8a24da1edc0779f0d3ff4dbbed46624ff0f047f0d86ce3adfa36c17a2320ba4044707eaa609
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SSDEEP
768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3KxG:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xz
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000e00000001e2b4-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000e00000001e2b4-12.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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 1652 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 3368 wrote to memory of 1652 3368 2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe 89 PID 3368 wrote to memory of 1652 3368 2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe 89 PID 3368 wrote to memory of 1652 3368 2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-24_f8e3c2de4fcd735db89322eccc30cb2a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3368 -
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:1652
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD50c7ef1409974191141b0b93743317dc3
SHA10312998ed2ccff48b7bd9014d1d11fc98ef0c534
SHA25655ce68910662a0ca4c7cd6a59efcebb7e5d30d01fb6e8b142034e644abccbd31
SHA512fcca1748ce3dffbaa7571c8250a97f0be57caa91166de64573094ef2fbf42b99d205d694ca95ed3ff11ac60f9b2a181c3ca8c3904b08ff70f49fdd36757077c5