Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18-01-2024 23:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe
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Size
60KB
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MD5
e1d3a3abf860b2c8e04d5c2c0b1a6bce
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SHA1
fbfcb12f74d444988b21a7d2d4154cc801c31171
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SHA256
60e6dcacb733d6735568dbb537f934e8e719facbdd870ac835c624d3a4a10576
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SHA512
d30ab92fd5c4a26bfa33794b8580427d61385601c837f513ba316496149ee9286eb8a9a0031cfeee50b1abd6439ef77239415a743cc9b518860cb1d3eb5a3d84
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsU:BbdDmjr+OtEvwDpjM8c
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2680-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000023221-13.dat CryptoLocker_rule2 behavioral2/memory/2680-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2236-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/2680-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2236-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2236-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2680-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0009000000023221-13.dat UPX behavioral2/memory/2680-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2236-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2236-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2236 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 2680 wrote to memory of 2236 2680 2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe 89 PID 2680 wrote to memory of 2236 2680 2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe 89 PID 2680 wrote to memory of 2236 2680 2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-18_e1d3a3abf860b2c8e04d5c2c0b1a6bce_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2680 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2236
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD509677d30740b74e04dada5a4d2462156
SHA1942fedce47019ca3757a1830ecf44d989b39795b
SHA25640d95227bda13d8c3f039932da2d4bcd6a818c8ccd38c3f1f1c4551d47026350
SHA512d9a270148c9e87dd429dc19af86b006a70dc655b264f9f9bd608f28acbdafbd49616cea706975b1941110ee33f888983897bb25325fedc112e06e307fe1415d7