Analysis
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max time kernel
150s -
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
27-04-2024 22:23
Behavioral task
behavioral1
Sample
2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe
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Size
38KB
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MD5
0b44809b720c36f2c5f2f21dc819ae64
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SHA1
5bf6b2e4afe926b2df6124fea930a443c154499f
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SHA256
a9eb9faab302f8da14601c00d1cf470da88d534d017632e3100af2517d11841b
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SHA512
e4712f2cf8558ca055b5778747f6272c317099702c4158c51635d90c8c8f04c455a1bf9e46824ef7f798e61b4f5dbf6e5e9da4fdeb8f896e4e58be18b57bc5fa
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYab1:qDdFJy3QMOtEvwDpjjWMl7TdJ
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/584-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1696-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/584-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/584-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1696-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/584-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/584-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1696-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/584-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation 2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 584 asih.exe -
Processes:
resource yara_rule behavioral2/memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/584-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1696-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/584-27-0x0000000000500000-0x0000000000510000-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
Processes:
2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exedescription pid process target process PID 1696 wrote to memory of 584 1696 2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe asih.exe PID 1696 wrote to memory of 584 1696 2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe asih.exe PID 1696 wrote to memory of 584 1696 2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_0b44809b720c36f2c5f2f21dc819ae64_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
39KB
MD5e5efca0d8fbb344a938068d16f0c33ed
SHA17bb2c58177dbcdd3e645990076fe790275942d16
SHA25618c7f614022c258ac85078a614008e7938c80e5a26b703258a70e6e2c19ebf05
SHA5120b95bec36273e4ca79dca48cb24779fdbef0f244c0e3d6a823fcc5258d22bbbd476df95d7593dbf95aeb19a17c154645e69b821929cd2d19c521236c427864be
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memory/584-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/584-20-0x0000000002110000-0x0000000002116000-memory.dmpFilesize
24KB
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memory/584-26-0x0000000001FE0000-0x0000000001FE6000-memory.dmpFilesize
24KB
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memory/584-27-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1696-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1696-1-0x00000000021D0000-0x00000000021D6000-memory.dmpFilesize
24KB
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memory/1696-2-0x00000000007B0000-0x00000000007B6000-memory.dmpFilesize
24KB
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memory/1696-9-0x00000000021D0000-0x00000000021D6000-memory.dmpFilesize
24KB
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memory/1696-16-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB