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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
18/02/2024, 12:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe
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Size
51KB
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MD5
bb90ed0ec4c5175f7f9964dc821c9ea9
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SHA1
12ad863191b2865319e738801e4b7b94a0e32276
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SHA256
332382ddfa560302e5f7679f3184207275c72da6b2687ece4895839dd2e453a1
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SHA512
014bfc39ee832e09aed590439876d4b8455758d2db95458e0da7c40ad658f0c1ac26930409f7e07ed11aea3ca46da24c8e817e881bbd5c99c41de01d1e3f043e
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SSDEEP
768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIRszjg:79mqyNhQMOtEvwDpjBxe8TpXRSM
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3432-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023207-13.dat CryptoLocker_rule2 behavioral2/memory/5084-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3432-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3432-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023207-13.dat CryptoLocker_set1 behavioral2/memory/5084-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3432-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5084 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 3432 wrote to memory of 5084 3432 2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe 83 PID 3432 wrote to memory of 5084 3432 2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe 83 PID 3432 wrote to memory of 5084 3432 2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_bb90ed0ec4c5175f7f9964dc821c9ea9_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3432 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:5084
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
52KB
MD538cb67899898d1a640eb26d68ba18524
SHA1315eecd45027c85fb08bddb9c094b8be762daf89
SHA25667bc8efd515a300c60d21148f90b3faf883a6e8786142303c765f1298637f3f3
SHA512d9e49a8b22597dfc6da0aecacce47bf61148612035c948aab7d3d17d0a9af66137211dd173daf34e70dd00f71a338afc4935c5fa4b12b7d4727083a951f221a8