Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18-02-2024 04:04
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe
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Size
61KB
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MD5
fe36d642ab33139de45e1ad0fcf5c7a0
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SHA1
915891df5656e7dc3a9beb32c088dff2c45df32b
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SHA256
8189a68f84c4b6b07f40993ab23f2a29b02e36898454a2581a4dfa7c139ee018
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SHA512
d5305ccc7b0791deb3ca093e4b9b1be16305671e927a6282e6ac6634dd00615dfc7dad7ad97b30ef0a35251d1a36869e030c3931b329d23dc0a97a10c4bb6521
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsk:BbdDmjr+OtEvwDpjM88
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4088-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023177-13.dat CryptoLocker_rule2 behavioral2/memory/4088-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4680-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4088-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4680-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4088-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000c000000023177-13.dat UPX behavioral2/memory/4088-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4680-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4680-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4680 asih.exe -
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 4088 wrote to memory of 4680 4088 2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe 84 PID 4088 wrote to memory of 4680 4088 2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe 84 PID 4088 wrote to memory of 4680 4088 2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_fe36d642ab33139de45e1ad0fcf5c7a0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4088 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4680
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
62KB
MD573588bc3955e6d935bec270f9065f535
SHA16747b32bfea923799c254897b617678bc924a44e
SHA2561a08c8abc35746ca9e42e4fa7ca20d69618fb242293d6979aa54b705b6225925
SHA51240216d2f9401dfc5e8f15f4351e5043ae0b4346e0db968e0b2ebe613019073d5b717ba428b12dfb3e4984a9c7b4223235c0f1d973e82cd0dfb8a8a9569743ebc