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Analysis
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max time kernel
150s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
19/02/2024, 08:52
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe
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Size
46KB
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MD5
c5db8b49a28cfda9d8c86c54104e1e89
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SHA1
01814312a96ffe0e53b191ab4f922ad1e0842e1f
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SHA256
5a96a8532e438520585af48a3556508d8749deb013edcc8e619f6d2b0811b3f2
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SHA512
3fac67df0e6a93989bdb5777e128cac4504973c7e8e6c61dd5dc527dc026bc2721b83d319762a532d6a993fceef87eb6374f870db7230a2cad8b59d9108e6022
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoN:qmbhXDmjr5MOtEvwDpj5cDtKkQZQT
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2020-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023201-13.dat CryptoLocker_rule2 behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/2020-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0007000000023201-13.dat UPX behavioral2/memory/2020-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4676-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation 2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4676 asih.exe -
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 2020 wrote to memory of 4676 2020 2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe 84 PID 2020 wrote to memory of 4676 2020 2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe 84 PID 2020 wrote to memory of 4676 2020 2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-19_c5db8b49a28cfda9d8c86c54104e1e89_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2020 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4676
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD5906777c3ae952d17c42680ec2d16312a
SHA1ec537f605fdeac93ef9496e520edebbc8ae22a89
SHA2569c3527488723a5a84ec636f0f91e5ffa6198a5394524630f1e2b94b1dfa11f39
SHA51297f9435255b08a2a700d988d1b3e66509e14d5e84d652076b6efe1b40e25ca2d6fd449df1a39ffb354c955de6e497b59d80638b334118287be5ce31a62218c57