Analysis
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max time kernel
10s -
max time network
154s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22/02/2024, 17:38
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe
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Size
34KB
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MD5
5c1398d8bf8f62c68ea581b470a2c497
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SHA1
eddc234dd6f340c4e5997a5cc03c54dbe186c345
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SHA256
7a5acd9fd0adcb951f40cfe533c8f7dd9f7a19ba56487b3b606108097f976c53
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SHA512
d3b041b732d86763977e828fd60807ce147085fe27649e4e99762442e7a264ce69230f19c8cad33c1acf2c7d7f9041a8c7ef638202cdca113f70187d6faad4f4
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjNc9:b/yC4GyNM01GuQMNXw2PSjH+PPNc9
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000a000000015e9f-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2540 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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
pid Process 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe 2540 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2332 wrote to memory of 2540 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe 28 PID 2332 wrote to memory of 2540 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe 28 PID 2332 wrote to memory of 2540 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe 28 PID 2332 wrote to memory of 2540 2332 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2332 -
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:2540
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
34KB
MD5ffc35fc562442f6fb46cf352f3461d5f
SHA10618fba8726f5b3d299c088e6b99577561bfa061
SHA256a2d5d7599d88262c21f0a916d10fbe3e3ea62acc4aaad79acd5533869f858c91
SHA5124c23d24956700318e8a13b59a82df525be737546f09462aa4bca04c29b0aa0a42c9d501e5139975c2ff6798ce10fd2d6d6d021b1c5f0b3d2caf9c99a982e2fd7