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Analysis
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max time kernel
150s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
18/03/2024, 13:24
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe
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Size
53KB
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MD5
06645ea8bbc515db86efad97e2b3d107
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SHA1
5870c7618d8145ccdd95d8ab4c1f8b4d812d7b65
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SHA256
47f1340084e8246053edd146578c808184ca5a36933ab8ebb8b99d483364c3dd
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SHA512
e4aa65b294daea0005a803fdce9997a1ec9e245c9f7fef91f20b410cbbf32fca2254d40a19e317e25e8de59f679f6b7bac726f848e80ea3f266c6177e7eb5a04
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyT:BbdDmjr+OtEvwDpjMA
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1020-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023203-13.dat CryptoLocker_rule2 behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1020-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3332-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1020-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3332-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1020-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000023203-13.dat UPX behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1020-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3332-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation 2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3332 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 1020 wrote to memory of 3332 1020 2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe 88 PID 1020 wrote to memory of 3332 1020 2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe 88 PID 1020 wrote to memory of 3332 1020 2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-18_06645ea8bbc515db86efad97e2b3d107_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1020 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3332
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
53KB
MD5a493a31f5d09c6bbf02902d6388c10ce
SHA14b7d40d65d800c368edb12b43102eb1bf33508f3
SHA256d7abb18ca450581542c197f8a3abb1be322e2ceb4708da708c19225d87d07fb8
SHA5127699af10b95f9dd4d05b14db859588bed1a93aad1de8b963eba6d2c9e6ef5324dfaaf190df7c8a263b706be573812e629fe3ecd7caa3c8066473a52df20ae527