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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
13/02/2024, 14:54
Behavioral task
behavioral1
Sample
2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe
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Size
80KB
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MD5
dfc68a4422144377f4a7e8dab62aef32
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SHA1
e52f5fcd63471fd930d5999cc62505fb17dd8b69
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SHA256
efa9a28bda455561043ccddca4fe61d76b4f2dc14d2e2cae7ef96957b8df7d57
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SHA512
f467998cae25617f6f440182d29dc7fd29e47f29f686ff3772ea5b84ae37dbbd0968bd723c4af9ae86655d823a761b92f4e17873a15fc5143140f0df1917b734
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBd0nJ:T6a+rdOOtEvwDpjNtK
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023226-13.dat CryptoLocker_rule2 behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023226-13.dat CryptoLocker_set1 behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0007000000023226-13.dat UPX behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2920 asih.exe -
resource yara_rule behavioral2/memory/4592-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0007000000023226-13.dat upx behavioral2/memory/4592-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-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 4592 wrote to memory of 2920 4592 2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe 84 PID 4592 wrote to memory of 2920 4592 2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe 84 PID 4592 wrote to memory of 2920 4592 2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-13_dfc68a4422144377f4a7e8dab62aef32_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4592 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2920
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
80KB
MD541a177f8c44a7f18855c9e12482d5a0e
SHA1be4ac75d4ed311ae55d03acdf79bb6cbbfc417b8
SHA2565ad4b079bbc3c87380971bb6281b8c302ab527332e197db7c4ebb6cbbb893090
SHA51294bfe8cb4ad073886878fc59d717229750da367b599564dd71ae85a731728ad69936e5c422247a509b06cadce5c967c750bb5415da5b973fc3c82bc1c9234dc8