Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 04:12
Behavioral task
behavioral1
Sample
2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe
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Size
41KB
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MD5
f095049d64961aa4dc3f6baf3f5dd8db
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SHA1
ca5576b66ebf50f1c80031ef3a27e05dafaba8a5
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SHA256
20368db0de3ead3d953c42ad998bc9d70e1e2d609b9450c64955c9a7cefd5caf
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SHA512
764db3456be48595a72da4621a4fb33d280c1e3ec16105e0fb1b56a19d79d84dc4a4b1d3c66221fcabc8f3e9721ce33a0ca1f9a1808b0f9982f3ad6e6c711c48
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SSDEEP
384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHs:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKM
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
Processes:
resource yara_rule behavioral1/memory/1804-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\hasfj.exe CryptoLocker_rule2 behavioral1/memory/1804-13-0x0000000001CC0000-0x0000000001CCF000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1804-16-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3068-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/3068-26-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 6 IoCs
Processes:
resource yara_rule behavioral1/memory/1804-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\hasfj.exe UPX behavioral1/memory/1804-13-0x0000000001CC0000-0x0000000001CCF000-memory.dmp UPX behavioral1/memory/1804-16-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral1/memory/3068-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral1/memory/3068-26-0x0000000008000000-0x000000000800F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
hasfj.exepid process 3068 hasfj.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exepid process 1804 2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/1804-0-0x0000000008000000-0x000000000800F000-memory.dmp upx \Users\Admin\AppData\Local\Temp\hasfj.exe upx behavioral1/memory/1804-13-0x0000000001CC0000-0x0000000001CCF000-memory.dmp upx behavioral1/memory/1804-16-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral1/memory/3068-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral1/memory/3068-26-0x0000000008000000-0x000000000800F000-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:
2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exedescription pid process target process PID 1804 wrote to memory of 3068 1804 2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe hasfj.exe PID 1804 wrote to memory of 3068 1804 2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe hasfj.exe PID 1804 wrote to memory of 3068 1804 2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe hasfj.exe PID 1804 wrote to memory of 3068 1804 2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe hasfj.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1804 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:3068
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\hasfj.exeFilesize
41KB
MD52f887815fbeb6430053b0b959d4554fe
SHA1bc872425bcd24966741bc899fda3fdaf080fd7cf
SHA256ef1a8ac2fd0491811429bacf01218b85946bf21d3219198a052b4dd86e9cfd70
SHA5128cc79a2f33b8cf2c70aaef65b22030e99e8a1c39c378f062dbbbbbaf2002dbccead5f6ed20d7b1824760a90b8a19bbcdf4d70a26a03cce37799c675e693ebad2
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memory/1804-0-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/1804-1-0x00000000002A0000-0x00000000002A6000-memory.dmpFilesize
24KB
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memory/1804-9-0x00000000002A0000-0x00000000002A6000-memory.dmpFilesize
24KB
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memory/1804-2-0x00000000002B0000-0x00000000002B6000-memory.dmpFilesize
24KB
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memory/1804-13-0x0000000001CC0000-0x0000000001CCF000-memory.dmpFilesize
60KB
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memory/1804-16-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/3068-17-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB
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memory/3068-26-0x0000000008000000-0x000000000800F000-memory.dmpFilesize
60KB