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Analysis
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max time kernel
148s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
02/05/2024, 01:02
Behavioral task
behavioral1
Sample
2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe
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Size
38KB
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MD5
a4fa9de8350ebb0b85e76bbce3a658c1
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SHA1
66051cf13dafdcbec642bb67415e4d692a8e27da
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SHA256
8e773ff162c9c380da2d68736cb343dcb0bb46942c8dd418c0f063fa4345207a
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SHA512
2359da2d9c47b0d2c84797b3432ec731caeafc31f33eeb0a9af19264747a39980701580be1e71a1d124ae0dccaf4928103904df15f1f5a27132ab50f416ba0ff
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc:qDdFJy3QMOtEvwDpjjWMl7TdW
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000b000000014ef8-11.dat CryptoLocker_rule2 behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000b000000014ef8-11.dat CryptoLocker_set1 behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp CryptoLocker_set1 behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000b000000014ef8-11.dat UPX behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp UPX behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2932 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1988 2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe -
resource yara_rule behavioral1/memory/1988-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000b000000014ef8-11.dat upx behavioral1/memory/1988-13-0x0000000002AC0000-0x0000000002AD0000-memory.dmp upx behavioral1/memory/1988-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2932-27-0x0000000000500000-0x0000000000510000-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 1988 wrote to memory of 2932 1988 2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe 28 PID 1988 wrote to memory of 2932 1988 2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe 28 PID 1988 wrote to memory of 2932 1988 2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe 28 PID 1988 wrote to memory of 2932 1988 2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-02_a4fa9de8350ebb0b85e76bbce3a658c1_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1988 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2932
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD552f228ab6bee7f6966da494ea1b26605
SHA19a7225400f68f53dfc3578d98b0d9057cf72d806
SHA256b4f7d270df2423150eaac836a37647b63c2677b6cd92fa79e80b10ceffdc8523
SHA51290ac9ee94f3687ba97f3ac19d5728ca08935444515777b16fcf35721618e418423c90b66d2ade3d33cd112ac6664b0eaae6aae21331c5a485de9316bd5bf5ff1