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
09/06/2024, 07:33
Behavioral task
behavioral1
Sample
2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe
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Size
67KB
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MD5
ad1d156e8bb19e69ee8d0d262537ad29
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SHA1
3b5e7cd61e0be42a145ce614b8112964cd62d20b
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SHA256
4b5565c77b6cac62f7b7c9d08b1d2d146fc11771e1399bd496ea9ffadeb09386
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SHA512
fcb0374d5586f8fef7f384d28da6e2649940e8b76e291790540139de693b82093620ee894e3a6f3b89f0aee8aa32cd70e0b6f5d6598fad48673c539b74b7da96
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xDyfXT:1nK6a+qdOOtEvwDpjo
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000a000000023422-13.dat CryptoLocker_rule2 behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/1272-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000a000000023422-13.dat CryptoLocker_set1 behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/1272-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000a000000023422-13.dat UPX behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/1272-26-0x0000000000500000-0x000000000050F311-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1272 asih.exe -
resource yara_rule behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000a000000023422-13.dat upx behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/1272-26-0x0000000000500000-0x000000000050F311-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 2916 wrote to memory of 1272 2916 2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe 82 PID 2916 wrote to memory of 1272 2916 2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe 82 PID 2916 wrote to memory of 1272 2916 2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_ad1d156e8bb19e69ee8d0d262537ad29_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1272
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
67KB
MD5affa2bac4eb8ba007608599320064592
SHA13b44758d23cd6fd3e4f3faa81141bcb2bb432b8c
SHA256488496c5d862442d7c3021ad6df81f4ba7b771ce761ea7c1a12a6d737054c01a
SHA512e89c1487f722a9136645c7557f43e576385785cc5ec2b1caee35145fd864f9824f0d9f37772e7017f6f6748f2945282cf321e4ed3011fbd217696cc76a85f9e3