Analysis
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max time kernel
150s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
27-04-2024 22:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe
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Size
31KB
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MD5
91b225b22e87d262ed81052e7fee84bb
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SHA1
1f6395ae0dd8bb10acc4861844d949c7fbd555f8
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SHA256
d98895867143ec5c69f3f8c9a8d1769b11380f36ac5f897ece5ae28d62eef63a
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SHA512
2ef313de3a55f9347f0926cc8c2024adc2b260cbed5d10dae9b9932957366741cc99be40d66ee66c537f965d640bca8cf592e9e888ee0d1947fcff49889b9a3b
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SSDEEP
384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTjA:bG74zYcgT/Ekd0ryfjfA
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1912-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\hasfj.exe CryptoLocker_rule2 behavioral2/memory/692-16-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1912-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/692-27-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
hasfj.exepid process 692 hasfj.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
Processes:
2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exedescription pid process target process PID 1912 wrote to memory of 692 1912 2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe hasfj.exe PID 1912 wrote to memory of 692 1912 2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe hasfj.exe PID 1912 wrote to memory of 692 1912 2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe hasfj.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\hasfj.exeFilesize
31KB
MD5f38631670ad242efb655ca7f71b63306
SHA118ce9841d2f724eec5f049a507e59e0b5f4808c4
SHA256fe5ad1d1f7e131a4a4b2b36fd2990fb4eb299365f9701128dd8bec5c20e28693
SHA5122fecef7656b7652442f8cc19d41bd6d9da4aadd5c42d3d6d3babb65666ec40378efc78dc973f8d0cfbbac8aace984f8bc2241539d53b154bcd7576eb6fdccacc
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memory/692-16-0x0000000008000000-0x000000000800A000-memory.dmpFilesize
40KB
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memory/692-20-0x0000000003010000-0x0000000003016000-memory.dmpFilesize
24KB
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memory/692-26-0x0000000002D60000-0x0000000002D66000-memory.dmpFilesize
24KB
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memory/692-27-0x0000000008000000-0x000000000800A000-memory.dmpFilesize
40KB
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memory/1912-0-0x0000000008000000-0x000000000800A000-memory.dmpFilesize
40KB
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memory/1912-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmpFilesize
24KB
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memory/1912-2-0x0000000003150000-0x0000000003156000-memory.dmpFilesize
24KB
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memory/1912-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmpFilesize
24KB
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memory/1912-18-0x0000000008000000-0x000000000800A000-memory.dmpFilesize
40KB