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Analysis
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max time kernel
8s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
15/05/2024, 05:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe
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Size
44KB
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MD5
4dad7c98b99a1aa280fc4bebfeec33f7
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SHA1
456f19ea215ffab096bb715e76ac5b9c7eedfc73
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SHA256
08f29efa264e253d943127f1daa0276f1931b23f02d7cbcb90952ccb96e924ca
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SHA512
50d383b1d5f82e37d7cb8653b5192af4669af7b4e6c0c7c32e93c01d3c75ed20bb3ba561f190e727e854abd52e17271536f483e91a7a209fab64e5ce18d92b0d
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAl:b/pYayGig5HjS3NPAl
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000d000000012345-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2456 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_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 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe 2456 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2108 wrote to memory of 2456 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe 28 PID 2108 wrote to memory of 2456 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe 28 PID 2108 wrote to memory of 2456 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe 28 PID 2108 wrote to memory of 2456 2108 2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-15_4dad7c98b99a1aa280fc4bebfeec33f7_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2108 -
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:2456
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD5dc8c5e67bedea4b578d0fb7c40cd60d2
SHA1a33965d1448985aa50dc01cdc3b725ba4e56f9ee
SHA2564df06a7f6e3a5569c49d6ddbccf1c115e1432228cf8112da69a0d02107ae6bb1
SHA51248feed0c77b56bc291016c14feef84079f43b3d30403af300ff264e5902ae77dd78ecad5eae1bc054be3bb8a003070642fbd46d07a3cd8bf70e6050e4fc33bfc