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Analysis
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max time kernel
143s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12/02/2024, 03:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe
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Size
61KB
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MD5
059eaef3399f06c2266b5c0f050e8b98
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SHA1
4b98a445073fdede0b6d39d9fe00959fd73a977d
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SHA256
1eb3701b01193c3ae359e00424d927f35a9e956cdb0b8cc9bc5081161f2cd517
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SHA512
f662a6d4118cc6c00ed66ce4ef14b3c28a6197895e3db1cdba8d3fb2e2b29cedf292c62d0c3868699986c686d5cf236869722b6d370417c838e889c16803e4ac
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SSDEEP
1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszudnYTjipvF299o:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7w
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000600000002321d-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000600000002321d-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation 2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 4508 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 4292 wrote to memory of 4508 4292 2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe 84 PID 4292 wrote to memory of 4508 4292 2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe 84 PID 4292 wrote to memory of 4508 4292 2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_059eaef3399f06c2266b5c0f050e8b98_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4292 -
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:4508
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
61KB
MD54f5d5afe53c38ba9368f96f0fc13e666
SHA11840bacd7ed173391d6ca32b59b848d00f44051a
SHA2564809e58c148d4ca647b1afb8bcaa8fd9755552d788f7496f0e4b519601a828e2
SHA512836be2c64b208d85ace25fff4f58ed825167b884fc6e16bc8d26d7aa064766c2e99a464f9541f60003a37f132b291380b7dda799b9e4206aae72c70867007b62