Analysis
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max time kernel
148s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04-05-2024 20:15
Behavioral task
behavioral1
Sample
2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe
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Size
38KB
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MD5
be31d9b74f3a8069072de65c25af5a09
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SHA1
9e153b30cdf6499950ac2d071d4f049c49787a2d
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SHA256
d1743549423b83eea8561b39e178d4dde85f37340d57d164e8adabe391933d71
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SHA512
77f8de7763ea926fd38e49bc209066af2e2d5d707a387f9dbc43621f19a7789df08e7a0011ed3b50592643acd2559654857765f8a61200fe94636fc56303e7c8
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY8:qDdFJy3QMOtEvwDpjjWMl7Tx
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2584-1-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x00080000000122cd-11.dat CryptoLocker_rule2 behavioral1/memory/2584-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2608-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2608-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2584-1-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x00080000000122cd-11.dat CryptoLocker_set1 behavioral1/memory/2584-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2608-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2608-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2584-1-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x00080000000122cd-11.dat UPX behavioral1/memory/2584-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2608-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2608-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2608 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2584 2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe -
resource yara_rule behavioral1/memory/2584-1-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x00080000000122cd-11.dat upx behavioral1/memory/2584-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2608-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2608-27-0x0000000000500000-0x0000000000510000-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 4 IoCs
description pid Process procid_target PID 2584 wrote to memory of 2608 2584 2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe 28 PID 2584 wrote to memory of 2608 2584 2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe 28 PID 2584 wrote to memory of 2608 2584 2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe 28 PID 2584 wrote to memory of 2608 2584 2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-04_be31d9b74f3a8069072de65c25af5a09_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2584 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2608
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5c31467e9b71025306efcda7ac077b154
SHA16fceba3f46823f01f5e461fbfe922114e5e3815f
SHA256b0525cce069e6f22ce1dae95eafd9310e827f8eba9637d01c1a81af2e3a6c02a
SHA51211d4604357ca72ed064ec4f63f4515eae211c6dea6712a9cca792456717a7a1f2fb88530b35b4f0389529d85d9a94c4b20eb1c5e626ce163c5b920fe71e81029