Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
12/06/2024, 18:49
Behavioral task
behavioral1
Sample
2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe
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Size
40KB
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MD5
61304570d99fe7aaecffd49beecec94d
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SHA1
e3a7146e36cff679aed621cee825e133996f1bec
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SHA256
279eeb24428ff9c5b6460b89ac51f94cbdf5fe5912b9829b13ff85f4fcb00b85
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SHA512
e67008a20bb6256ea7eea6149b013001721670ae4bdb8969bf0134a167bbfd269566d02ff527f6ff4bc395fc295698e9d4489a4f71c7bf7da91b3766c1cc6840
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabDb5:qDdFJy3QMOtEvwDpjjWMl7Tdl
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000500000002328f-13.dat CryptoLocker_rule2 behavioral2/memory/3904-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2216-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000500000002328f-13.dat CryptoLocker_set1 behavioral2/memory/3904-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2216-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000500000002328f-13.dat UPX behavioral2/memory/3904-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2216-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2216 asih.exe -
resource yara_rule behavioral2/memory/3904-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000500000002328f-13.dat upx behavioral2/memory/3904-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2216-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2216-26-0x0000000000500000-0x0000000000510000-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 3904 wrote to memory of 2216 3904 2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe 82 PID 3904 wrote to memory of 2216 3904 2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe 82 PID 3904 wrote to memory of 2216 3904 2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_61304570d99fe7aaecffd49beecec94d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3904 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2216
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD598131efd313ad10bdf7b6ecd0600cd78
SHA16db8e4d6ec504c02297c0d1ff92f0dd05ecb4150
SHA25688228f32a52678f117477e2021ab361d8e1d712c34aad7c7cee970e1d27883a5
SHA512deba179242ac7fc7ad7a36cde5219c069ba9443552ddcb660fb8fd10fd0b2e9c97ff8dfe0943437a775f7b9da5cb5268e8b63b6c6bbb1d9ed8807e17e7187c1e