Analysis
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max time kernel
142s -
max time network
150s -
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 19:57
Behavioral task
behavioral1
Sample
2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
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Size
56KB
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MD5
50eb50a2a424d69e6907106db7887468
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SHA1
6aea148c392727694cb48c9dfb8c45ee7e7298d6
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SHA256
49fca5a78d3e946abce36499df180095a42cc936ca8db4071215ea2aeff7bde0
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SHA512
c9cf325964d6d41cdfd41b845ef67cd59351879599585f18f420a4713a876db6394edd1ade89dccb874d5ed9a57c254ec69ff250fec63cd1dbb42b44b301b681
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SSDEEP
768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpymZuK:zj+soPSMOtEvwDpj4yeK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_rule2 behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_set1 behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\misid.exe UPX behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exemisid.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation 2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
Processes:
misid.exepid process 1604 misid.exe -
Processes:
resource yara_rule behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\misid.exe upx behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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:
2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exedescription pid process target process PID 2604 wrote to memory of 1604 2604 2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe misid.exe PID 2604 wrote to memory of 1604 2604 2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe misid.exe PID 2604 wrote to memory of 1604 2604 2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe misid.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- 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\misid.exeFilesize
56KB
MD5b2daf8534e4be8eed3cb0aba1582ed9c
SHA130c28f757ff1b37cb0248efd0718c30328c5fd18
SHA25674271e58bfdd62d5e7cd6e3cf520a1e8681819a49ed2548a78768c279dbe007e
SHA512d544dd8c367c4daf8cc0d6246d4fff738245aea1a69e2c4678036d8b64559cf7f17a2e1c6dddcf9b7e8efce9400b89cfd483ff70a002042296bfbe6e0767aee1
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memory/1604-20-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
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memory/1604-19-0x00000000004F0000-0x00000000004F6000-memory.dmpFilesize
24KB
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memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2604-1-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
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memory/2604-2-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
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memory/2604-3-0x0000000002070000-0x0000000002076000-memory.dmpFilesize
24KB
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memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB