Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
03/05/2024, 07:32
Behavioral task
behavioral1
Sample
2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe
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Size
38KB
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MD5
f266bd4620bb1e098dbd7eacfbbf0cc5
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SHA1
817745bb793bea097387ebaf3f7f6ac77e44b88f
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SHA256
993241541a323ddf23a084790792116ae145dffce41394288adab5dc1d5a9087
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SHA512
97f50cba5588e7c2e1f374151098a350c47d499740053ab6dcb5c0961a65225e08de88a9b189e7e9ac60e93c3146e6453e6812d9027f3347b2b3f250167b54be
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYB:qDdFJy3QMOtEvwDpjjWMl7Ts
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/712-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d000000023b2e-13.dat CryptoLocker_rule2 behavioral2/memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/712-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4396-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/712-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000d000000023b2e-13.dat CryptoLocker_set1 behavioral2/memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/712-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4396-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/712-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000d000000023b2e-13.dat UPX behavioral2/memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/712-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4396-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation 2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4396 asih.exe -
resource yara_rule behavioral2/memory/712-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000d000000023b2e-13.dat upx behavioral2/memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/712-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4396-27-0x0000000000500000-0x0000000000510000-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 712 wrote to memory of 4396 712 2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe 84 PID 712 wrote to memory of 4396 712 2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe 84 PID 712 wrote to memory of 4396 712 2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-03_f266bd4620bb1e098dbd7eacfbbf0cc5_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:712 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4396
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5f0a9b4c1a1f92dc430be2f463548a67d
SHA17fd4664cb75b7aac8e4b3e932c08922ea140129c
SHA2564ecb6cc62061ba5157529693db751bb5eb0ec88c139963ecc9f120c9ec920d89
SHA51280185b71b0a12e5c3487fcbbb8260f2ce16e415c8208cb157f8ce07fd966ee66fc69e7673ca51d3cf3fe50c60becd98d1edde73ba95806510fab1c7b138985bc