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Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
24/04/2024, 17:55
Behavioral task
behavioral1
Sample
2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe
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Size
77KB
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MD5
bb8bdc9688621afd9fdc7f163eae51ee
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SHA1
d67c6c3e935625d027ab5611d332ed505dbc071d
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SHA256
9ad5ecbe456b85a26b97b775353dfc74cd4c678f19febee7ed46874e7fb0e1b3
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SHA512
8a079160bb57b94ef566595fb4a76827900e34960832c475c010dfa2d0bae76c7b3764ec90bdc067918e36d414aeeaefd2b0b99dddc5d2297946b9d6abad2fd8
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxzV:T6a+rdOOtEvwDpjNtHPy
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a000000023401-13.dat CryptoLocker_rule2 behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a000000023401-13.dat CryptoLocker_set1 behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000a000000023401-13.dat UPX behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation 2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4868 asih.exe -
resource yara_rule behavioral2/memory/1256-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000a000000023401-13.dat upx behavioral2/memory/4868-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1256-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4868-27-0x0000000000500000-0x0000000000510000-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 1256 wrote to memory of 4868 1256 2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe 89 PID 1256 wrote to memory of 4868 1256 2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe 89 PID 1256 wrote to memory of 4868 1256 2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-24_bb8bdc9688621afd9fdc7f163eae51ee_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1256 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4868
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
77KB
MD5af3d45d5d91a68ef84c790824d3149c5
SHA1f93b1bc76647e8dafe13e12707122850e6f214a3
SHA2563d770b3cd152bee6dc399b95a5d8da207c1c61269ce7d275b93a1ec07ee3ec6e
SHA5129e040c024028115884ff81f5ca1048b71157c036c4f1a88bcac70738afd8311d58e0e31e846f0e4825f3de450df59562629548fc33e5cc67ffdb9d88d8818fe9