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Analysis
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max time kernel
147s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
16/04/2024, 15:02
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe
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Size
66KB
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MD5
e4b09c0548b9d530b18a5b78d08d6461
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SHA1
52e29a1955b0ad61a3191c9de4dc2b7eb395e93f
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SHA256
32c96bdad6ea30e0097377991cf8bc037538549cf8da24f42c269f681ead8408
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SHA512
441a5cc00a1174e03c975a31823faf0a4cb2e658b79e7ed7b68664c8b354247feedd06aac3c31f7abb1f1ffcd68d2b5e4ad08f6da004ce84fd42fb503fb86c16
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SSDEEP
1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszudnYTjipvF293vaRLN:aq7tdgI2MyzNORQtOflIwoHNV2XBFV70
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0005000000022a73-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x0005000000022a73-12.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-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation 2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-776854024-226333264-2052258302-1000\Control Panel\International\Geo\Nation hurok.exe -
Executes dropped EXE 1 IoCs
pid Process 2708 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 1032 wrote to memory of 2708 1032 2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe 85 PID 1032 wrote to memory of 2708 1032 2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe 85 PID 1032 wrote to memory of 2708 1032 2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-16_e4b09c0548b9d530b18a5b78d08d6461_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1032 -
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:2708
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
67KB
MD55d77bc26e2154d45c1709158f3ff95fa
SHA1efadf2a0e7c0be58bc872b1c3b92eccc842ab351
SHA256c0c87af564ccfa7ab9c9132f665e0a5849a33d137bee07edcb89c4310f9e2add
SHA512a8b2a6f6fac9c21fb91aa291d63244b58ea33be529db0bcad1f7ab9f5c3e0bfe55468a251e31ae6c59e5cb275af1306c96ea2bedacb9fc00f22e96fe420b6ada