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
11-05-2024 23:31
Behavioral task
behavioral1
Sample
2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe
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Size
39KB
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MD5
d056df3ef182508448d86d45e3ce5288
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SHA1
076dccdb918dd2dfae790b474b4872c74a569b5a
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SHA256
1c0fe7576cf4b8558214b3ba0e0a21cef70c153af8a602a0b1c9fa2923842366
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SHA512
8a13e37c99a0d01712672016cbcdda6bd28d6d9c65495bee6930429c65ada01e8e5b5e9e9eb0965c26c6dc6fcd6ea6c6724e902dafd8375ef0f854af867a35a7
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/U:qDdFJy3QMOtEvwDpjjWMl7Tx
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/432-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c0000000233da-13.dat CryptoLocker_rule2 behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/432-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4348-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/432-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c0000000233da-13.dat CryptoLocker_set1 behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/432-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4348-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/432-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000c0000000233da-13.dat UPX behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/432-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4348-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4348 asih.exe -
resource yara_rule behavioral2/memory/432-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000c0000000233da-13.dat upx behavioral2/memory/4348-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/432-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4348-27-0x0000000000500000-0x0000000000510000-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 432 wrote to memory of 4348 432 2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe 82 PID 432 wrote to memory of 4348 432 2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe 82 PID 432 wrote to memory of 4348 432 2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-11_d056df3ef182508448d86d45e3ce5288_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:432 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4348
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD51008b7ed40392299a5e50241493e9e56
SHA1ea2efbad8ed60589bec0db088beb51e91a0d5374
SHA2568ba4a0d679b21d0fc998aaa9b8d5c2cd0709b3e851c5c046360d7005b815d02b
SHA5125178cfe0bc0eacd9f97cb199a1d545348d758dffdea396c7954ae7dabfe19f0f788a98d586a23447f5c61d89ccba8129384790a4b6500196da4b25e90e7e646c