Analysis
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max time kernel
4s -
max time network
82s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
22/02/2024, 20:47
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe
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Size
31KB
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MD5
f335673f25f838240b76ee713f786f02
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SHA1
44f8e47f4393265c0ba78b6d36a2cedc1e03d77d
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SHA256
0edb5a71269986b02bfea9b1a16a0f7c4bdb73fe99083dacb2f30b524214d871
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SHA512
1b1c63b3e82c64840ab6df409b598b8fc1e0e66f913da4d8054159f67daa82ef628df1b7ecf8675983e6e3945f5aae4607aff246439fff3e0381c19b82bccff1
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn8YtI:b/yC4GyNM01GuQMNXw2PSj6
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000b00000001224d-10.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2120 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 1712 2024-02-22_f335673f25f838240b76ee713f786f02_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 1712 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe 2120 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1712 wrote to memory of 2120 1712 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe 28 PID 1712 wrote to memory of 2120 1712 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe 28 PID 1712 wrote to memory of 2120 1712 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe 28 PID 1712 wrote to memory of 2120 1712 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1712 -
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:2120
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
31KB
MD57bd6a9cb61b48e862024957f6cefdaff
SHA17a8a365c2d57966b8643b30e3ff43d491489737c
SHA256eb88d4d90d75c9fc6b963e07c46f12d94c766514863af95efb6bc7c26980fe35
SHA512348dc6d94e06e296e9211a8537c1429fbbb9d5c21593fd2596f6442bf1d9931ec160e379b06c24cc9e5838cc64415252831b47b6a4ff6fb5a686c56a9bc15a33