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
20/02/2024, 09:33
Behavioral task
behavioral1
Sample
2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe
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Size
61KB
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MD5
68d8d05902f8eee7f44291ea80cdd968
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SHA1
052a8dbdaf7926d0acae8cb991b52ed82341ca68
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SHA256
65fbeef18cb58f8c8d74a141a1edc613b3ff26e817fa374341c843e72040daa8
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SHA512
1660914226d841f7c790c696c59490508af2d316281cd5531793537e0bf31843798d2ecefafb2a9b55d3942ace2a7b89579c227f6436a5150dc9a571bd22f7f6
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5aFr7YOzR8l/A:z6QFElP6n+gKmddpMOtEvwDpj9aYaFA8
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c0000000231e7-13.dat CryptoLocker_rule2 behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c0000000231e7-13.dat CryptoLocker_set1 behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000c0000000231e7-13.dat UPX behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2244 asih.exe -
resource yara_rule behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000c0000000231e7-13.dat upx behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 2992 wrote to memory of 2244 2992 2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe 86 PID 2992 wrote to memory of 2244 2992 2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe 86 PID 2992 wrote to memory of 2244 2992 2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2992 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2244
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
61KB
MD594ccff879673c80784473df036f221cd
SHA14d14dd32cc7248e6ca413df22b1bd9c09a7ac820
SHA2564e97dab1f399117dd1743d4dfcbb790b1d7e09fab98352e4d3ee757c20d59ca0
SHA5120c4a7400fd3fbf1c8d5cdecb8b484c58bfc287abb5a9b16612f4b37c1b36770ef6fb89186920758487a6e7d302d121525fddb4f2bf40d3eee411c2ef333218f2