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
11-05-2024 14:34
Behavioral task
behavioral1
Sample
2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe
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Size
88KB
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MD5
f4c6732e6082f572e97d548403f578d7
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SHA1
8200660db4677ac3e2e3b84a73301cc4818d2697
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SHA256
49d0edb6a97b487d8c68bff3e6d02ecd001cc3f6372ed4b431ac32be408947d3
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SHA512
3fa3d32f43f7a669391eb2b184ad5cb68e55cc808e2f4d47e033d8f76433b5caff012ac6ea3b1f3c80a9dcf86cc540139dcf60659e0f180af64e4c9aea93e9f2
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgQq:AnBdOOtEvwDpj6zl
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
resource yara_rule behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000d000000012334-11.dat CryptoLocker_rule2 behavioral1/memory/1688-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1688-14-0x0000000000630000-0x000000000063F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2936-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2936-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 6 IoCs
resource yara_rule behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000d000000012334-11.dat CryptoLocker_set1 behavioral1/memory/1688-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/1688-14-0x0000000000630000-0x000000000063F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2936-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2936-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/files/0x000d000000012334-11.dat UPX behavioral1/memory/1688-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2936-19-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2936-28-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2936 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1688 2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe -
resource yara_rule behavioral1/memory/1688-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/files/0x000d000000012334-11.dat upx behavioral1/memory/1688-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2936-19-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2936-28-0x0000000000500000-0x000000000050F000-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 4 IoCs
description pid Process procid_target PID 1688 wrote to memory of 2936 1688 2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe 28 PID 1688 wrote to memory of 2936 1688 2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe 28 PID 1688 wrote to memory of 2936 1688 2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe 28 PID 1688 wrote to memory of 2936 1688 2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-11_f4c6732e6082f572e97d548403f578d7_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1688 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2936
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
88KB
MD52fb72ff6a08ea09a675927f2e86ed618
SHA173ee16bc9915469cbb4b1c91febd749b2282bbf6
SHA2562017fbd7e0db584a0d0bd5c4ed6f56fcd610e30d4e6840f285c40d75ad42e44f
SHA5121f2b62c5383ad50c3f7f2f326c2d9b2d8a34db472634468d86ef0031c9e1c21ad90e06bac89594f30f83111f1136cb3aeee590944f52775088021c971fb9bca7