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
12-02-2024 17:47
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe
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Size
52KB
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MD5
bc41cc6cb711a6d8d00a2786d9ddba3b
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SHA1
bf1f559b6b663ede350d3ec215183494f0389549
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SHA256
687697d175f11f532195390c15f0d5e76b9a046149eaeaeb55fe700a0a7aa65b
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SHA512
6d8578b00597457ae80ab7bed45af8f83254411b1ca3666ed02c06254fd15696f6b0d636b80f0c0b42d8ec933fdc4229ddf287e90a5d1ad76e2b6f93a730b129
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vaTiSfQaV29yDD:X6QFElP6n+gJBMOtEvwDpjBtE1yI9y
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2568 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
Processes:
2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exedescription pid process target process PID 3512 wrote to memory of 2568 3512 2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe asih.exe PID 3512 wrote to memory of 2568 3512 2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe asih.exe PID 3512 wrote to memory of 2568 3512 2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_bc41cc6cb711a6d8d00a2786d9ddba3b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3512 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2568
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
53KB
MD5a12530cedafbc100accd182f09b4ce2d
SHA109887726c15bffd69e7aada9a3f3c1d32addc0ca
SHA2566457c22f0eed7ae83fbc27fd924df5786333c5c07bbfc1a9e98b22e2fa747ff1
SHA512a22a58e32299dad66291f264d22890938701ac2cd519db8957a682ebe1d9fa72b756c5eb94fa330f31e98eefac41ea85842c591107f62aed0a7834bb11b23d55