Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 01:18
Behavioral task
behavioral1
Sample
2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe
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Size
40KB
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MD5
bbb707cda5d93d596ae50e1c1ba4f47d
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SHA1
9b785147a00c0d57f1bdf2aedd796f6aaf936287
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SHA256
c67dea1afa7f3d432a629c774762881ec1d83d118446ce5fc623102e93e93ea8
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SHA512
a138c11f99652a6a05a60789c717eb3f67a96c4f1ad428e1da1fbfe91d01332b56897b51c8aaee31dc9937839d07ba2d871a2885118b8c7b84a498f83911b9ff
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8t:qDdFJy3QMOtEvwDpjjWMl7Tdn8t
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023371-13.dat CryptoLocker_rule2 behavioral2/memory/3408-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5000-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5000-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c000000023371-13.dat CryptoLocker_set1 behavioral2/memory/3408-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5000-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5000-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000c000000023371-13.dat UPX behavioral2/memory/3408-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5000-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5000-26-0x0000000000500000-0x0000000000510000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation 2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5000 asih.exe -
resource yara_rule behavioral2/memory/3408-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000c000000023371-13.dat upx behavioral2/memory/3408-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5000-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5000-26-0x0000000000500000-0x0000000000510000-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 3408 wrote to memory of 5000 3408 2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe 81 PID 3408 wrote to memory of 5000 3408 2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe 81 PID 3408 wrote to memory of 5000 3408 2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_bbb707cda5d93d596ae50e1c1ba4f47d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3408 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5000
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5f08b7c3e6c36d44ffef46bf2eff2c42e
SHA1fcd5f4252e88d3e8c75208f799b47671aff45b6b
SHA2568ac5fe0aeb16d569f6cfa127e15c2a80d0706eb3e948ad984010748514063591
SHA512b9bbf5e59c1ba9213b934ba5949463c47c7ca64e49dd3a33fb7a8447c918bcc93aa0e253de34d3389ea1e30e0812e1ea16a256f9cd7299c3e0ed7e6eb6ec51c1