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
23-02-2024 02:46
Behavioral task
behavioral1
Sample
2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe
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Size
88KB
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MD5
c86209e650de4fd5a3c38b7386d5ccff
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SHA1
ef5a0169e066eed1c3e5aafb0c341bae9b445a7d
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SHA256
2833b8d3b8eb040f00407b7bdd1edb15e43cd1c1b05586d7e5c476687a1b20e9
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SHA512
97440c83eec73a939e4d9034d25b5e2bc80eeb9c14bf29eded75098274f8bddea9cdb7dea54e87bfa4d9d25f6f0195bdf0089ba78571c7d07dafdd56789c137a
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg7dU8:AnBdOOtEvwDpj6zF
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2524-1-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000a00000001224c-11.dat CryptoLocker_rule2 behavioral1/memory/2524-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2628-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2628-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2524-1-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000a00000001224c-11.dat CryptoLocker_set1 behavioral1/memory/2524-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2628-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2628-26-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2524-1-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/files/0x000a00000001224c-11.dat UPX behavioral1/memory/2524-14-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2628-16-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2628-26-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2628 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2524 2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe -
resource yara_rule behavioral1/memory/2524-1-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/files/0x000a00000001224c-11.dat upx behavioral1/memory/2524-14-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2628-16-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2628-26-0x0000000000500000-0x000000000050F000-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 2524 wrote to memory of 2628 2524 2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe 28 PID 2524 wrote to memory of 2628 2524 2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe 28 PID 2524 wrote to memory of 2628 2524 2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe 28 PID 2524 wrote to memory of 2628 2524 2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c86209e650de4fd5a3c38b7386d5ccff_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2524 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2628
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
88KB
MD5bff1b088a72d54ebc69fd592dee86312
SHA12e4ff8256e5ce31e8779fecf2e1c62073367a4f7
SHA256ea0e0591c49777262f13b644a760945adf52e6d6c0d3d8c3c349c4f6bd05f45f
SHA5123aa8d6f098ec8209106b123081e3a3e72aaec0bd5f53938ac5817cc7a5749968c57ecbeb821d70806e05e03a1429b967b87ce59432150f7632a1d5f9c26e273f