Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
22/05/2024, 02:40
Behavioral task
behavioral1
Sample
2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe
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Size
79KB
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MD5
ef29eec03e194942892863a026a6f57d
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SHA1
89f7dfcd5a1b016aa36fa1af7c9617d5e0813ca3
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SHA256
fe4093e0e4d091043abcc46617d68d2cd983295d5c7c24b2b2eee1ca41b0a477
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SHA512
c947666bbd56ff01d4b3a3b40f1f3b158fe2a5b75cb19e0c746939bc3015812c96d7a973f43ed566c1f7907c0a002d591a7eca5decce47ecf8ccb1680f363571
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRk:T6a+rdOOtEvwDpjNtp
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000023419-13.dat CryptoLocker_rule2 behavioral2/memory/4028-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4028-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0009000000023419-13.dat CryptoLocker_set1 behavioral2/memory/4028-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4028-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0009000000023419-13.dat UPX behavioral2/memory/4028-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4028-27-0x0000000000500000-0x0000000000510000-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 2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4028 asih.exe -
resource yara_rule behavioral2/memory/4196-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0009000000023419-13.dat upx behavioral2/memory/4028-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4196-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4028-27-0x0000000000500000-0x0000000000510000-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 3 IoCs
description pid Process procid_target PID 4196 wrote to memory of 4028 4196 2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe 82 PID 4196 wrote to memory of 4028 4196 2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe 82 PID 4196 wrote to memory of 4028 4196 2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_ef29eec03e194942892863a026a6f57d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4196 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4028
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
79KB
MD5fc7908375b7bdbf9b5aa127c2e96c17e
SHA1c4e4cb34f06d65d5569588565b636ff16c27dd22
SHA25602990a969d694d621f582a804dd01a3635c69ba278b00857ac85c7b69ad47cdc
SHA512c0255c0a3aef8355fda94c0a38e2acf5c567bea9c8027ec38ecb32b4f8a609fa868a2b69705d768482954a63753521e6ecf787f81533a110dd4d783d43b20e68