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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
22/02/2024, 15:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe
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Size
49KB
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MD5
4fca0af95db245fca11fd921d3086cda
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SHA1
2023893550c90f49e7cc7de58883fd8a4708ba01
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SHA256
a46176397842241861983142e6bc7766a2c413cbbdf9155bfb102d55494e8421
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SHA512
e5a3c19855e0456f6de6310cbdc1c88dc5035cd5bbaf67ba834749814d4e57c85bc58fb3dd29d684455184746bc60ac09fe59a29736f8b516dab8a55cf3b2683
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SSDEEP
768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHYcF:79mqyNhQMOtEvwDpjBxe8GrF
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/3780-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023237-13.dat CryptoLocker_rule2 behavioral2/memory/3780-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/3780-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023237-13.dat CryptoLocker_set1 behavioral2/memory/3780-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation 2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4228 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
description pid Process procid_target PID 3780 wrote to memory of 4228 3780 2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe 84 PID 3780 wrote to memory of 4228 3780 2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe 84 PID 3780 wrote to memory of 4228 3780 2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3780 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4228
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
49KB
MD59af3537a82fb02c094b26a52dac8395e
SHA1561ada0d9c0b432f928ae2a493a93e6967163d75
SHA2564bf9762b5983795eeccffe69b838cb63603eba2cced3e0c7e86b962b8b6bdb36
SHA5126f685c4fe570668133bd6bab6e872d634f2a84088240c014a5a124b927d7df7eaca6ae4709b6cb15d595d91eca802811af33fa29ab4a1dab1eb3683e8e8ed47a