Analysis
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max time kernel
150s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 01:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe
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Size
34KB
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MD5
6991f83afc6547f2597e8c3cea0d0e4e
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SHA1
b09c986f25996a429eae00fbd2e2301bb5a24fe0
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SHA256
c0ab0c81c984f3d055a49450dfb69795cf355d9c506b057684762edce6cedff5
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SHA512
4ed40cb353ed1865dc092c0f46213dda86298fa140c089bfa23f653877ec677af38b033ac1d1f17dc9a5c7d268470cadc927bd5f37cdb32e5605ecb4c9ed0744
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs82uMuCzb:b/yC4GyNM01GuQMNXw2PSjSKkc9/MV
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\retln.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation 2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
retln.exepid process 3508 retln.exe -
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:
2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exedescription pid process target process PID 1632 wrote to memory of 3508 1632 2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe retln.exe PID 1632 wrote to memory of 3508 1632 2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe retln.exe PID 1632 wrote to memory of 3508 1632 2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe retln.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_6991f83afc6547f2597e8c3cea0d0e4e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1632 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3508
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD5ad386d25d5d3ef8ac1c2ae8b1229147d
SHA11491e833db77f74e4f042242926a6b94bb36f0e4
SHA2565f580e70c799d7dd57953bd5f2948b300a6eacc0b708ccc30209229fe6657fba
SHA512ceb2665d60a7a4dfce9cf982bd57f9bba272f121313a581aa9b1489455c0da2455a13bb9dbb7f67c747951c4156f6e8fec8424abcb104f14f6629883884b7235