Analysis
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max time kernel
149s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
25/03/2024, 13:25
Behavioral task
behavioral1
Sample
2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe
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Size
98KB
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MD5
1035df6c5d3c42999fd62d2e86609063
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SHA1
af937edbe5fd0f676b0a7390a2ec14c575341ffb
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SHA256
27e2d06bd818ef96f2310db2ee8d5ec73ae27c46fc13f0fa223f0fb18cbece71
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SHA512
868642fd553850ba3d7d8e1953d4a74fad8a9b97c5c012fa46e7533d3eb82b3ecdcfcd6a087fe06c5daf0e8f527989a63530590d12df9e7c2f239a01d54344cb
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKiseW:z6a+CdOOtEvwDpjcgH
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023218-13.dat CryptoLocker_rule2 behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023218-13.dat CryptoLocker_set1 behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000023218-13.dat UPX behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-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 2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4228 asih.exe -
resource yara_rule behavioral2/memory/3332-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000023218-13.dat upx behavioral2/memory/3332-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4228-26-0x0000000000500000-0x0000000000510000-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 3332 wrote to memory of 4228 3332 2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe 88 PID 3332 wrote to memory of 4228 3332 2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe 88 PID 3332 wrote to memory of 4228 3332 2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-25_1035df6c5d3c42999fd62d2e86609063_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3332 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4228
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
98KB
MD5c95aca1a47d4f3102ceea36d2bc899c4
SHA1dbf42e9e7bf8639b03358fd2e408e66ad311d37d
SHA25606ee473696b6978aefa67ae79e2ed4b41bc6dddb93309fd7d387bf5ed05f4578
SHA51201755fd88072f13f9585075ef3033041b14dfc36416b248854c90c97c3f64afa83fd8d39108dbfd6bc275a27012829c27e68f02285e8e903ab424cdf1738f418