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
09/06/2024, 07:32
Behavioral task
behavioral1
Sample
2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe
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Size
62KB
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MD5
9db34b4cee6971c03bf44f646ad3fa6b
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SHA1
e2a4b505eea6d88c5775318e0d043a2845b205a3
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SHA256
38d54562bfc0911c7da587f8ce77bace6e873a2dde7e048a6aec38d3b0c34524
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SHA512
45d8b47c49fc246354a37129623ed80f52a9e8d0b4b487d6c5dc327af05c82136c47411978675fd740af236e70d539e22fb59b6797b25a87a9b85cbc1d049cd7
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHNMh73U:1nK6a+qdOOtEvwDpjjU
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4400-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_rule2 behavioral2/memory/4400-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2792-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2792-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4400-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_set1 behavioral2/memory/4400-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2792-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2792-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4400-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000600000002326f-13.dat UPX behavioral2/memory/4400-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2792-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2792-27-0x0000000000500000-0x000000000050F311-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2792 asih.exe -
resource yara_rule behavioral2/memory/4400-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000600000002326f-13.dat upx behavioral2/memory/4400-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2792-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2792-27-0x0000000000500000-0x000000000050F311-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 4400 wrote to memory of 2792 4400 2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe 81 PID 4400 wrote to memory of 2792 4400 2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe 81 PID 4400 wrote to memory of 2792 4400 2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_9db34b4cee6971c03bf44f646ad3fa6b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4400 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2792
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
62KB
MD5ec1eac9d402a6c4853321290a81ae641
SHA1cd216df090423b82c2e208ccefcbd56235572b45
SHA25605a7ec8d490540d482a5ed0ab613ad2f912a9877e87da7834bbc8efc46536f47
SHA512513e38697e89689d6cc17b6bc1721b2bde7557b9d3701e34fb261f38876ab5f3084a4f15e7c6bd68a1d273aea25db45e01203188e607405cf7443867fa0c458c