Analysis
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max time kernel
183s -
max time network
193s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
24/02/2024, 11:32
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe
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Size
45KB
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MD5
2719975fbe1e4e70e709d384341c1db1
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SHA1
bd58a5e726fa50c99dbc81107ca45facb4391400
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SHA256
85ac581d7f8494bce51b5f5649f479dcd29f59173e04c6281511f1f1dde23d47
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SHA512
9e4d8c3bd08bb176c59c42ba32b39f7604caf3605131dedad7dff7c3ba732a550b5f7e8db00488efd75faaa4737fe0b75b46462ff759ce0d7d5e53483d760b82
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MomzF:qmbhXDmjr5MOtEvwDpj5cDtKkQZQqF
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4448-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002321e-13.dat CryptoLocker_rule2 behavioral2/memory/4448-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1820-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4448-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1820-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4448-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000600000002321e-13.dat UPX behavioral2/memory/4448-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1820-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3538781373-1545967067-4263767959-1000\Control Panel\International\Geo\Nation 2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1820 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 4448 wrote to memory of 1820 4448 2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe 92 PID 4448 wrote to memory of 1820 4448 2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe 92 PID 4448 wrote to memory of 1820 4448 2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-24_2719975fbe1e4e70e709d384341c1db1_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4448 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1820
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
46KB
MD5e731152036e0c4a5d89683b44dc3dc44
SHA165cae42e377ee8160e407feb5b71e88c392b0721
SHA2565089bfc2e966819b01f5e449df57a8caf33d8ef728478c68688755b5efe5ba22
SHA512077603ebab3c06c5d6afdba68c919d1ea7dcc2f7efbab019b5d2c560420ccf2a2b5fa5c50c639d897f35b83e03ad8816f184f162a7b33100d7c58201e76df9c6