Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
04/06/2024, 05:50
Behavioral task
behavioral1
Sample
2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe
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Size
90KB
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MD5
c14a3bd4b82919480a9478d2d41924e3
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SHA1
abc2398147a6a1e0d65b97996ca8cf79db9be4ee
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SHA256
e98997de326ef212073c78aad0206bc2f64d19585533ec44332838cc50c0c049
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SHA512
ad83619c8f889ee03947373dddff7904b4f98ac9ad10a2b7682ea2a8ba30ec9677ddd5a39d76221a45d13503feeb4416a789feb64a281239ca82d46bd6a0f4a0
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAB:n6a+1SEOtEvwDpjYYvQd2PB
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023278-13.dat CryptoLocker_rule2 behavioral2/memory/3108-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5064-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3108-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0006000000023278-13.dat CryptoLocker_set1 behavioral2/memory/3108-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5064-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3108-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0006000000023278-13.dat UPX behavioral2/memory/3108-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5064-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3108-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3108 asih.exe -
resource yara_rule behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0006000000023278-13.dat upx behavioral2/memory/3108-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5064-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3108-27-0x0000000000500000-0x0000000000510000-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
description pid Process procid_target PID 5064 wrote to memory of 3108 5064 2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe 83 PID 5064 wrote to memory of 3108 5064 2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe 83 PID 5064 wrote to memory of 3108 5064 2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-04_c14a3bd4b82919480a9478d2d41924e3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5064 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3108
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
90KB
MD5bd47ed81bae78bc04792549f37dd62ad
SHA1c1583f852354674ee9484a83133b6d27341b129c
SHA256811d8c140d538a88d3fbd2a7296aab1e7a94e05f642afd175c7b740acf3e01c8
SHA51226a1c0897ee24a6d0abceb1a880e645c3e3ae9531904024ef3a1ab767745c7c1ada9a54f78d15c8c1eb91db7d360f453ac137c8ae2523653a8bafc5298809d61