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Analysis
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max time kernel
3s -
max time network
71s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
19/03/2024, 20:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe
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Size
35KB
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MD5
03536215f3a82169420d9e5ba8ebfcc4
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SHA1
a8a541a3a9af85aee86555689e32e522b1b33a1f
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SHA256
9259836c45851a9d33089eb7aa3608e5b7ff854e096fda71fd904098283c6b16
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SHA512
f0faf33753dda3f1770b5a73ab9c88dae05910024bfc2023549bbb94fd6577bc139e83edb459269337eaf6c0b5f2ff53ffcb809ee3decd4190838d74080be43c
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZQYFxh4:b/yC4GyNM01GuQMNXw2PSj1POah4
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x0009000000014120-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 3000 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_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 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe 3000 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2380 wrote to memory of 3000 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe 28 PID 2380 wrote to memory of 3000 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe 28 PID 2380 wrote to memory of 3000 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe 28 PID 2380 wrote to memory of 3000 2380 2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-19_03536215f3a82169420d9e5ba8ebfcc4_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2380 -
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:3000
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
36KB
MD59221af77af562e6fd135366c34fd0b01
SHA1c4a02b5215fb21e9b204d982e25d019ed836cf6c
SHA256dc9f17ef1a3ce26bf42eefaa4f0d4f63f9f00eb11bc755b5234183d2f32b77b0
SHA512d310af99e6e2ea04e0f1b60390fdaa72f61ec3fef7d9ceb3b572480dfb276308fba921d467ddf84bfad2cac11b2e23ccf41090c0bba41a8249d52df8fcf76d40