Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
12/06/2024, 18:43
Behavioral task
behavioral1
Sample
2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe
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Size
41KB
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MD5
b831353f920ed50ba14c9dae189b8e37
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SHA1
3ff06d328a2e4fd2a5441ed065f67f9c098d1994
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SHA256
24cd98c92de3f71b5ed52698fa8c4c2553251e715af3667e61abc1402b57b1fc
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SHA512
a893eb11f77629d7eeb146502ed89b356c09cb2a382af4bed478699e636a38a6950e1bc7e8d6a87af1df771901d5f9e8e7579ea98dc71df17f6e6fb345574b2e
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc4S1:qDdFJy3QMOtEvwDpjjWMl7Tds1
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000d000000012334-11.dat CryptoLocker_rule2 behavioral1/memory/1984-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2172-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2172-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000d000000012334-11.dat CryptoLocker_set1 behavioral1/memory/1984-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2172-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2172-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000d000000012334-11.dat UPX behavioral1/memory/1984-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2172-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2172-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2172 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1984 2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe -
resource yara_rule behavioral1/memory/1984-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000d000000012334-11.dat upx behavioral1/memory/1984-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2172-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2172-27-0x0000000000500000-0x0000000000510000-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 4 IoCs
description pid Process procid_target PID 1984 wrote to memory of 2172 1984 2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe 28 PID 1984 wrote to memory of 2172 1984 2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe 28 PID 1984 wrote to memory of 2172 1984 2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe 28 PID 1984 wrote to memory of 2172 1984 2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_b831353f920ed50ba14c9dae189b8e37_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1984 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2172
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5bdd25fc69fafcd93344e44f49f91620b
SHA1ae87dab63b3ef9ec0f016887d0b7a4fe22962bf7
SHA256a01c8efd73d3d13a89d17853111869b71537befe58a00369200ee6ed3bf2dc6c
SHA512eb5fc6318d86697011d46c351a2cd7b8466802ea6a16b981126434e6c85a44357538947025e19aa61e02a261608f169ffa044212f95630c45ce6a6e49ae85005