Analysis
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max time kernel
150s -
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
10/06/2024, 21:52
Behavioral task
behavioral1
Sample
4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe
Resource
win10v2004-20240508-en
General
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Target
4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe
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Size
96KB
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MD5
52e97d348b0c54b4bb22103de121e404
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SHA1
40da81df10fc4a9266a2b2bdc8d834aa641715bc
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SHA256
4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495
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SHA512
5a38261047b9d975a9fd19ccf598786d063f7e49c9cb24a5ab00b56f18e748296c2070f6fb0a7f50c11804c7811312de1a1427b04298f9e93bac2f0157077d06
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp0+8:AnBdOOtEvwDpj6z3
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4696-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/4696-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4952-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4952-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4696-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/4696-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/4952-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/4952-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4696-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/4696-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/4952-19-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/4952-28-0x0000000000500000-0x000000000050F000-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 4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe -
Executes dropped EXE 1 IoCs
pid Process 4952 asih.exe -
resource yara_rule behavioral2/memory/4696-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/4696-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/4952-19-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/4952-28-0x0000000000500000-0x000000000050F000-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 4696 wrote to memory of 4952 4696 4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe 82 PID 4696 wrote to memory of 4952 4696 4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe 82 PID 4696 wrote to memory of 4952 4696 4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe"C:\Users\Admin\AppData\Local\Temp\4cfea33c0f63f46219a23cdd61d552caf6c4501bc37ef982f2b09cfaf216f495.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4696 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4952
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
96KB
MD56646be29c80150b95f3e499c4e1140c0
SHA11ee32e634c6cdb2d4857d2445316e7f100a41460
SHA2561207d16369d4625b64b46f3e864e68364d9fbb83e57bd3caebff608d86da6aeb
SHA51270e6758f0d66c580c74ced8ad4676a855126e683a4620cd14dcca401a9866afcc4874449342330a17cb64d94bfa9bdae4e7a7454466cf78b6008d71236e0596d