Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 04:46
Behavioral task
behavioral1
Sample
2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe
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Size
54KB
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MD5
d7627b3ede76fea4ad6544f77832c7e9
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SHA1
61402a036805300025b29f3a3db33201dd9f9777
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SHA256
d10cdad7b7bf53417dd9b3675d13bedf80229c5d54b850fba371de96bd5b5a74
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SHA512
c54fb0aba94b1a75cfbd97660d293c6a67254469a2fb85c65ec92721351843a9234209ff1651a4c73f421379386ca9995035cfe1a07f1c52facceeb74a1cdbc5
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkgPYe:z6QFElP6n+gKmddpMOtEvwDpj31ikgt
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2468-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023405-13.dat CryptoLocker_rule2 behavioral2/memory/2468-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/776-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2468-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023405-13.dat CryptoLocker_set1 behavioral2/memory/2468-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/776-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/2468-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000023405-13.dat UPX behavioral2/memory/2468-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/776-26-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation 2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 776 asih.exe -
resource yara_rule behavioral2/memory/2468-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000023405-13.dat upx behavioral2/memory/2468-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/776-26-0x0000000000500000-0x0000000000510000-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 2468 wrote to memory of 776 2468 2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe 84 PID 2468 wrote to memory of 776 2468 2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe 84 PID 2468 wrote to memory of 776 2468 2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_d7627b3ede76fea4ad6544f77832c7e9_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2468 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:776
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
54KB
MD5252b9c3189d0cf22859610619a3b8383
SHA1ae71becd4696030911c20595f12fce098e3a96fc
SHA2561bb721188e60d9016eeb2190b71fd0240f41b43ab2042525e38619faf94a0adc
SHA512ab269186d0e6cf5ac0db03166893c492a31dc0e0341a0d956a3642a978ce74929b4d09e8de027e2759fbb54eda0a6e1d1f57df0797045a36cbc222ac86470dd9