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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
27/05/2024, 04:52
Behavioral task
behavioral1
Sample
2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe
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Size
94KB
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MD5
d3d8a1cf4b82b52f4dda2f643aa0eee3
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SHA1
af1d7cad6e05290fe107a15502f15b3e4fa6a32f
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SHA256
8750d5628c3a6c9e6a03e18ff57e849120d4229922dff90a027a2ed69dca5d3c
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SHA512
5860d5a3e0434208699848b9bc634c0dc2d6b88008c6de252255434dc228faad646a8b10aa8cfc46cf5b0dd2631911bbb8e83ecc73d1bc497bfb6072b53467c4
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+oy:AnBdOOtEvwDpj6zBy
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_rule2 behavioral2/memory/2988-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1516-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2988-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_set1 behavioral2/memory/2988-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1516-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2988-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x00070000000232a4-13.dat UPX behavioral2/memory/2988-19-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/1516-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/2988-28-0x0000000000500000-0x000000000050F000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2988 asih.exe -
resource yara_rule behavioral2/memory/1516-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x00070000000232a4-13.dat upx behavioral2/memory/2988-19-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/1516-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/2988-28-0x0000000000500000-0x000000000050F000-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 3 IoCs
description pid Process procid_target PID 1516 wrote to memory of 2988 1516 2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe 82 PID 1516 wrote to memory of 2988 1516 2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe 82 PID 1516 wrote to memory of 2988 1516 2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_d3d8a1cf4b82b52f4dda2f643aa0eee3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1516 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2988
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
94KB
MD56cb8c8000f389d4f2c73a728ad9da349
SHA1f18e874bb26d28187a936dfdce200384c1128d28
SHA256c93f21d8fcc20da34280f5413a2a7921459bbf16f109f094ed32bf6813bffacc
SHA5126c6202c271813e32d979cab0377a8efc045900bc957b215be5ace1f0e1f5a54516ceb9c89fc984bfa67342da29d8e660277e1bc00a18baf0e55ee66eff68697b