Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
12/06/2024, 15:33
Behavioral task
behavioral1
Sample
2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe
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Size
92KB
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MD5
e4eb63de14f56983b365b68199cf2c4c
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SHA1
deab3733bf021ce1fa857a622aaeb2aa08f44892
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SHA256
b8c87dea9554b06b87fd88d9d5f23f0dfc41368132cc2140054d75a16aa9d01d
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SHA512
8d567626d61e633a1a1b51c02f6a56c5e72fefeec40802991200015ee80375ddf63973eff54e07fda4a126c23f6e137a9507bc073e8f274510df9efee7618954
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdd2r:AnBdOOtEvwDpj6z0
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/436-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3068-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/436-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/436-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3068-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/436-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/436-16-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3068-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/436-28-0x0000000000500000-0x000000000050F000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 436 asih.exe -
resource yara_rule behavioral2/memory/3068-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/436-16-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3068-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/436-28-0x0000000000500000-0x000000000050F000-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 3068 wrote to memory of 436 3068 2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe 81 PID 3068 wrote to memory of 436 3068 2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe 81 PID 3068 wrote to memory of 436 3068 2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_e4eb63de14f56983b365b68199cf2c4c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3068 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:436
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
92KB
MD5f04d9dfc405ac56785b70ff84c42a6dc
SHA108b536d2a6e137ed577a42ef6eb17aaa77ec7d2f
SHA2565efb9147f1f46818f391bef8c7c4b479389215e7eecebb0719bf557f1ba7a3ae
SHA5122743a208598f4c99c9dae1add0bf06edfade4f1621ae3acd16ee2060fe86b24563130f74d6d16c22dac99e5e5a295ec78c95f206cc9cbd3e0595146d4c56d822