Analysis
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max time kernel
120s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22-05-2024 02:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe
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Size
44KB
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MD5
704f3898b15f5fd082547d5463d30956
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SHA1
5be1cc9361dd32b2ba4fefcd80d0c90993777437
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SHA256
332a9f9e03fc8bcd5b0fff937505097b5e19974c326424dad7a27e0090976541
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SHA512
72fc74a989a1b9512cb59efb011fba93e95257ef08c9f2cab3d78af7f396ab5e2e4b5edb9c23396b3dd3cfa18faaf835ae9b396ad0d5d88fae779b550b1186b1
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA4DwOoJ8:b/pYayGig5HjS3NPAuwfO
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule \Users\Admin\AppData\Local\Temp\retln.exe CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
Processes:
retln.exepid process 2944 retln.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exepid process 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of UnmapMainImage 2 IoCs
Processes:
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exeretln.exepid process 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe 2944 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exedescription pid process target process PID 2492 wrote to memory of 2944 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe retln.exe PID 2492 wrote to memory of 2944 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe retln.exe PID 2492 wrote to memory of 2944 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe retln.exe PID 2492 wrote to memory of 2944 2492 2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe retln.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_704f3898b15f5fd082547d5463d30956_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\retln.exeFilesize
44KB
MD50fe61a2623d987d4e5b2378ac578d7d4
SHA13d2707629104ae721ba27b3928ccc08bd21f2688
SHA2567f4a527e986250d7e83dd801e8d20eb6d476ad461c3f5aa5814d96ebb8d3f467
SHA512b53a0d7d69c86c3c04dff3bb1a4f52461f8ac309abfcfb9c5d5d72fb306da2b4cd6108a994ddca4abe20b32a47b581ef8f2ffd568e03b2b660a250038051ecd3
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memory/2492-1-0x0000000000400000-0x0000000000406000-memory.dmpFilesize
24KB
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memory/2492-0-0x0000000000270000-0x0000000000276000-memory.dmpFilesize
24KB
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memory/2492-8-0x0000000000270000-0x0000000000276000-memory.dmpFilesize
24KB
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memory/2944-23-0x0000000000360000-0x0000000000366000-memory.dmpFilesize
24KB