Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
23-05-2024 18:18
Behavioral task
behavioral1
Sample
2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe
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Size
102KB
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MD5
bf33dc67557031625b660590e3d985e9
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SHA1
b9b3a3518cc20990d2c7156f109f5bfd022ef53a
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SHA256
ee1682d3e45b2864dea6a8de5d6904f4e8549fdd16f2bcb5e72954d05e19a9c6
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SHA512
c7c67308c1f21c9febf6fa6b61dc8af006b7585ae59b98a2f15c0d3e5e0f06791445021ddb6d1dc887e0f7f493dc12cb1d1d5e59dcb388582bd42a16537cb512
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeBc6:AnBdOOtEvwDpj6z4
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1660-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral1/memory/1660-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1660-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral1/memory/1660-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1660-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral1/memory/1660-16-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 3036 asih.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exepid process 1660 2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/1660-0-0x0000000000500000-0x000000000050F000-memory.dmp upx \Users\Admin\AppData\Local\Temp\asih.exe upx behavioral1/memory/1660-16-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/3036-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/3036-27-0x0000000000500000-0x000000000050F000-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 4 IoCs
Processes:
2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exedescription pid process target process PID 1660 wrote to memory of 3036 1660 2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe asih.exe PID 1660 wrote to memory of 3036 1660 2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe asih.exe PID 1660 wrote to memory of 3036 1660 2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe asih.exe PID 1660 wrote to memory of 3036 1660 2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_bf33dc67557031625b660590e3d985e9_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\asih.exeFilesize
102KB
MD5573a0e91076085d665bb063bb2216988
SHA1111a4117e7a9faa0793fe96f1b31e35bf7e0dd62
SHA256518df5ed327ed7e9792c8a9491b2449c9936ee11fdb9cc1d7f87798108c6c179
SHA5120ac4ec02543513b1ff733b57f91dbc3ce797c53db571942f26cea641c1f9d79a372cc701d6528e32c0b646c796368bdb5fffb72f05a08c9930db436f9db2775e
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memory/1660-0-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/1660-1-0x00000000004A0000-0x00000000004A6000-memory.dmpFilesize
24KB
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memory/1660-9-0x00000000004A0000-0x00000000004A6000-memory.dmpFilesize
24KB
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memory/1660-2-0x00000000004E0000-0x00000000004E6000-memory.dmpFilesize
24KB
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memory/1660-16-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3036-19-0x0000000000470000-0x0000000000476000-memory.dmpFilesize
24KB
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memory/3036-17-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB
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memory/3036-26-0x0000000000320000-0x0000000000326000-memory.dmpFilesize
24KB
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memory/3036-27-0x0000000000500000-0x000000000050F000-memory.dmpFilesize
60KB