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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
29/05/2024, 04:52
Behavioral task
behavioral1
Sample
2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe
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Size
39KB
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MD5
70bf58577fee487a9e8b4a585adc799b
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SHA1
e12eb418aae174314aa5954de64d2b1887854afe
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SHA256
835962b49b56b8d83e08f3ef1eac22ecc2894e089b71c6c547b5f12f3feccbb4
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SHA512
b6e08ba0ae85d7ba7e3f616693faacca048643bbdb40491595f4ffa0c766596b249f227f2727828fd92b76b99c5491f1a1a2fa548678bf4983a299635f7b4656
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/s:qDdFJy3QMOtEvwDpjjWMl7T5
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023276-13.dat CryptoLocker_rule2 behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0006000000023276-13.dat CryptoLocker_set1 behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0006000000023276-13.dat UPX behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3292 asih.exe -
resource yara_rule behavioral2/memory/2060-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0006000000023276-13.dat upx behavioral2/memory/3292-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2060-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3292-28-0x0000000000500000-0x0000000000510000-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 2060 wrote to memory of 3292 2060 2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe 82 PID 2060 wrote to memory of 3292 2060 2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe 82 PID 2060 wrote to memory of 3292 2060 2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-29_70bf58577fee487a9e8b4a585adc799b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2060 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3292
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD57767ea9ec187893f96a01d6c43fef1dd
SHA130d85b2177eaf8fe53b221b26910cd418465f184
SHA25619d72afadb85210c1f4873df6ac6cc7816d2df892efc9326f9681cc2dbc07e3b
SHA512c35633c4129437d4825e31e5975d2371524e2e0985f259680bf5245eebf36997b8bff057716ea63b286e98a58f89973f7bf364d6daed39fc77665b2ec1c4af72