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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
19/04/2024, 04:11
Behavioral task
behavioral1
Sample
2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe
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Size
99KB
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MD5
860c9bc7a9bd2d9f9d3bccae00c64ea0
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SHA1
ffc89d4b4e6f4c7330440f291b46f66da9215d59
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SHA256
14504a6244e43cf440be0433f129d1402a4b348b228f875655dd36ed9567136d
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SHA512
a3b92b62afd0bac5443e32ea33b8588c011cf9fe2f91dd07c55e89275a773f87e3e96755115d0b501e8c52a223c19000445a4c78c15c6d65129025b072f6d093
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKiXv:z6a+CdOOtEvwDpjcb
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3716-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d0000000233a4-13.dat CryptoLocker_rule2 behavioral2/memory/3716-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3716-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000d0000000233a4-13.dat CryptoLocker_set1 behavioral2/memory/3716-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3716-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000d0000000233a4-13.dat UPX behavioral2/memory/3716-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation 2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4716 asih.exe -
resource yara_rule behavioral2/memory/3716-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000d0000000233a4-13.dat upx behavioral2/memory/3716-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4716-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4716-27-0x0000000000500000-0x0000000000510000-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 3716 wrote to memory of 4716 3716 2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe 85 PID 3716 wrote to memory of 4716 3716 2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe 85 PID 3716 wrote to memory of 4716 3716 2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-19_860c9bc7a9bd2d9f9d3bccae00c64ea0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3716 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4716
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
99KB
MD5fa9cdef428984e4229593a9a72609a39
SHA1cad32add42cc7b26beca787a1f0fe69f3bef0ac7
SHA25622eb187f0a9b274b984ed7c2be8fadac3fbefce7913a71715207137855590dfa
SHA512fca59408997e76a411a86b75d187a8927a7bf65767461c7dcde433505cd62922944929acb79ae9baa6471d0d73e41df8f1dcbdef3ee10caa76272008f7d49361