Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
03-04-2024 06:43
Behavioral task
behavioral1
Sample
2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe
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Size
107KB
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MD5
330fee7f685c92178f5301f458824738
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SHA1
901ba4cdc95f4c57450f385ea20c4ec7f29718ca
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SHA256
edce48dd9b1dd2a0d2d4d2ce656cd9f0d8768e2fc119381f1e71706c9bc7efdc
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SHA512
3d709747e6dcb21e2f93c6fbc0f4053e2ef50085374a2b2dd605e8904a8293ee2cbed439be18da4ecf613ac081187e9ace994fdb8b50e7cc58cd04fece0c5021
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gkszf8q:1nK6a+qdOOtEvwDpjp
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
Processes:
resource yara_rule behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation 2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 828 asih.exe -
Processes:
resource yara_rule behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-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
Processes:
2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exedescription pid process target process PID 1240 wrote to memory of 828 1240 2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe asih.exe PID 1240 wrote to memory of 828 1240 2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe asih.exe PID 1240 wrote to memory of 828 1240 2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
107KB
MD54366a65490f72cb9ddb917d2dfade3b4
SHA1467fa8a6c04a8e06b8ecd1a67e9e1b7c28fe55ea
SHA2560aafc030fc2b0843cce479377f0de14913ed25dbf59f0e88d906960f3918a0f2
SHA512276c85e549daac99ae89f6251f94d8fd5c7556c93471429c0c0b5b4e2a15518376f9660db283677515852d5fcad7806c4ffae75c98b6d50b002f7a91c10ee7e9
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memory/828-19-0x0000000000640000-0x0000000000646000-memory.dmpFilesize
24KB
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memory/828-21-0x0000000000620000-0x0000000000626000-memory.dmpFilesize
24KB
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memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB
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memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB
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memory/1240-1-0x00000000004C0000-0x00000000004C6000-memory.dmpFilesize
24KB
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memory/1240-2-0x00000000004C0000-0x00000000004C6000-memory.dmpFilesize
24KB
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memory/1240-3-0x00000000004E0000-0x00000000004E6000-memory.dmpFilesize
24KB
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memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB