Analysis
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max time kernel
16s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25-01-2024 17:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe
Resource
win7-20231215-en
General
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Target
2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe
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Size
38KB
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MD5
ea1c97d4a55233587d16fea3d2118c22
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SHA1
c268a4b78ff6bc5f9b59729d0351c4c973b3db52
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SHA256
3e6b5e3b5e794c5ed3fac5bf9fb824072730bf7e6816432132088386f186a3b3
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SHA512
cd12ca2537e37dda3d48d34b3b807139bffb612f2232469baf0819989e81102291ad52b097f3ec4068d282059f9a8f431602123b59720b7058af771c00a8dc62
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu2x:b/yC4GyNM01GuQMNXw2PSjHPbSuYl3
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 2700 retln.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exepid process 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe -
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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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:
2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exeretln.exepid process 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe 2700 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exedescription pid process target process PID 1768 wrote to memory of 2700 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe retln.exe PID 1768 wrote to memory of 2700 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe retln.exe PID 1768 wrote to memory of 2700 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe retln.exe PID 1768 wrote to memory of 2700 1768 2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe retln.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_ea1c97d4a55233587d16fea3d2118c22_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1768 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2700
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\retln.exeFilesize
39KB
MD562cc778e5f787e41e077c63cf9b7d2cb
SHA13ed1e59f498e3044b9a56d6ae7d98156b262330a
SHA2566131bff917f0b6b21e967a1f77cb99f4482e092d71495a57fef69a6947e95562
SHA5124877be93aada7e78cb00043c23ebe2e065b0b312512bdfadea6ec31181186bfaac22833d6f1d7581507790b3bfeb9d44a7abfd763dee2745348b994a97e95d3a
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memory/1768-0-0x0000000000410000-0x0000000000416000-memory.dmpFilesize
24KB
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memory/1768-1-0x0000000000400000-0x0000000000406000-memory.dmpFilesize
24KB
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memory/1768-8-0x0000000000410000-0x0000000000416000-memory.dmpFilesize
24KB
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memory/2700-20-0x0000000000310000-0x0000000000316000-memory.dmpFilesize
24KB