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Analysis
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max time kernel
148s -
max time network
153s -
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, 22:55
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe
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Size
45KB
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MD5
704af4484e70e67d63855603e0b8639c
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SHA1
9f7a0df3b01a22a5bfe7ebad5b314bb1294dac32
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SHA256
e059bc121eaaf3bed9728352419e1f50b6c79b902901dd442bfb4fe1399a3582
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SHA512
295f3accf94101759270fdc9ae6c170119ff1b97d5ad22040e67eaf6718ca73479768aabab6d4616249c2563f119f4ce935a7b9b620e471327913dce40a2f651
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTBL:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6t
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000e00000002317b-13.dat CryptoLocker_rule2 behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4804-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000e00000002317b-13.dat UPX behavioral2/memory/4804-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4324-25-0x0000000000500000-0x0000000000510000-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation 2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4324 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 4804 wrote to memory of 4324 4804 2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe 87 PID 4804 wrote to memory of 4324 4804 2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe 87 PID 4804 wrote to memory of 4324 4804 2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-18_704af4484e70e67d63855603e0b8639c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4804 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4324
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
46KB
MD57ccd13c6c80f9b82192ba93d6d56236a
SHA16c36cfafa9268eafe2cce840cd1575d64e1257dc
SHA2561bfca39bc85dfae8d796d93f2be7d9f10e7ca32669085d964f3fe1c3d1a2fa34
SHA5128d5ba1856a635b5c50769a374554a4be417b265966d34ea7a4da6a653c78e436495658e1ff69171875c85609d2da56b95fac483e879c57b72e7884e2de198b7b