Analysis
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max time kernel
149s -
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 02:31
Behavioral task
behavioral1
Sample
2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe
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Size
77KB
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MD5
49a642ce80c19129ea221f1d4bc9315e
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SHA1
e12c7937d17dce49e8ce88ca76cb238db08b7daa
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SHA256
75a58ead3c9fb96db4d869178fc964e330995899b2683229e164906f0c5f0fbd
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SHA512
94a2d92a58850b56685c5e90b06287e1ae5d8293083faf608b6ff76cf122b874a26b29b7ecaf84bd1549e561e721fb7549aac6be923c5cfd56d7d85374239f25
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1d:T6a+rdOOtEvwDpjNtHPi
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/4768-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4768-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/4768-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4768-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/4768-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4768-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 4768 asih.exe -
Processes:
resource yara_rule behavioral2/memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/4768-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4768-27-0x0000000000500000-0x0000000000510000-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
Processes:
2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exedescription pid process target process PID 2840 wrote to memory of 4768 2840 2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe asih.exe PID 2840 wrote to memory of 4768 2840 2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe asih.exe PID 2840 wrote to memory of 4768 2840 2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_49a642ce80c19129ea221f1d4bc9315e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
77KB
MD570d492784927c4a7fd6984096fb4ae1b
SHA1298ac5f28b4178d1a131155670cbc44ca8026197
SHA256605a0167341d1efd933eed971a1a1ddfdd0ea03156c207a4805e3a20579f5ee3
SHA5129dd1ec8e6c7e76f9f1a53f6f002b851cbe68879e8853b9a22cfc504a72eb364777a15c2f9963756146c2cb633054ea7bcb87801de04e820e83bebc7b7d6029a2
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memory/2840-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2840-1-0x0000000000530000-0x0000000000536000-memory.dmpFilesize
24KB
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memory/2840-2-0x0000000002100000-0x0000000002106000-memory.dmpFilesize
24KB
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memory/2840-9-0x0000000000530000-0x0000000000536000-memory.dmpFilesize
24KB
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memory/2840-17-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/4768-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/4768-20-0x0000000000650000-0x0000000000656000-memory.dmpFilesize
24KB
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memory/4768-26-0x0000000000630000-0x0000000000636000-memory.dmpFilesize
24KB
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memory/4768-27-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB