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Analysis
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max time kernel
14s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
04/02/2024, 08:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe
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Size
38KB
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MD5
2618359e59365da681adce117f44ba98
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SHA1
4165fb73a50addbbdf8627752c89d4d996dd0ba2
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SHA256
95a408a3a778f1741ce032d1bd72b3d575b9e6fe52d23155ebfdd4db38066980
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SHA512
dca117cf7d9d0259b67443c4bdb6c8943645fe304ab9c5cde1879dee9b4ff77e8e9229b42b6cde3e4941be246cbdd62823f0e279e65f1b8210a7c564b8d1e79f
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu3y:b/yC4GyNM01GuQMNXw2PSjHPbSuYl7
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000a000000012243-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 3068 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 1044 2024-02-04_2618359e59365da681adce117f44ba98_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 1044 2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe 3068 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1044 wrote to memory of 3068 1044 2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe 28 PID 1044 wrote to memory of 3068 1044 2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe 28 PID 1044 wrote to memory of 3068 1044 2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe 28 PID 1044 wrote to memory of 3068 1044 2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-04_2618359e59365da681adce117f44ba98_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1044 -
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:3068
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5a965fe397f038b0792b72924d6397921
SHA18330be40c92b4f9b452de2e40f6af3cd2ed11c84
SHA2564f582c6293d82a6b92357f20510df2c8810f57266365b11b1bcfa370b2298b67
SHA512ee9b5d13809215eeade4236c7f664cb05a4149cfea13d980dfd22da2617ae8b675523a4c53c5dcdf83def4c51a376b00320f5dc7f88be6e6b48788a7853c85b1