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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
28/01/2024, 03:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe
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Size
81KB
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MD5
591a3c464577563901a82e9e36d4c975
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SHA1
4aab4428d7c5bb58d80583f548e4cfb900421d25
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SHA256
cdabc84f446ffa31595537c61a9ea2848d864f44a00cc410f6d9920bcdc91d5b
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SHA512
427e70564cebd1cd71c14e3c4fcb4abf9faa3ae6a5dc5114565e1e1823604e879ef8f740bba23d006a7e866fc0df4d86330675707a7342ddb0add16d4f0a722b
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SSDEEP
768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLa5VccPtNw5CS95yFPFh6:V6QFElP6n+gMQMOtEvwDpjyaLccVNlV6
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00070000000231f5-11.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x00070000000231f5-11.dat CryptoLocker_set1 -
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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5088 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 800 wrote to memory of 5088 800 2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe 85 PID 800 wrote to memory of 5088 800 2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe 85 PID 800 wrote to memory of 5088 800 2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-28_591a3c464577563901a82e9e36d4c975_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:800 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5088
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
81KB
MD53a263c2653af78579c53a9ad887a7130
SHA15fe837af89135d9a7ca469d67a32647f56f362cf
SHA2563c77de2aa2ca7ef2575c5ac476ae70c2a88b34728ffef9d3b4ba67a5d705d06c
SHA51240cfce383fa6ddd28f077b1c155f3e7f0a8da69df75f7a88dee6825e248a0336c7cd3eb0f2e8e3cc4aec6a4cb83db2ff7e8c010fdb2d95ff42ef644e1dcba4be