Analysis
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max time kernel
15s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
27/05/2024, 18:46
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe
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Size
41KB
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MD5
e86563b09645ddb7464fccb7d1fdd390
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SHA1
b15c69755a89ef44e74e68642b7186fc1acb5629
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SHA256
aaaa3b43426637ca9cdc30e5066061264170cc93f5923d462addc1179877b7f0
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SHA512
66d767650022bcbb9e1f5dae2e0e8fcf4279ce78547a9bdde712f1e6000732393d5b6e94a5392abd738e7a0038769853e8948a4b6386bab78ad1de4158901faf
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyv7:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZ67
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral1/files/0x000d00000001232c-13.dat CryptoLocker_rule2 -
Executes dropped EXE 1 IoCs
pid Process 2984 retln.exe -
Loads dropped DLL 1 IoCs
pid Process 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_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 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe 2984 retln.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1964 wrote to memory of 2984 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe 28 PID 1964 wrote to memory of 2984 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe 28 PID 1964 wrote to memory of 2984 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe 28 PID 1964 wrote to memory of 2984 1964 2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_e86563b09645ddb7464fccb7d1fdd390_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1964 -
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:2984
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD55a18fe9daecdbaf09b182090a767e194
SHA14127c8c71f21f4f6152154197ba90bbfa5e94d4d
SHA256ed687604ab929336f77a256df9a14a15aa59299fe14a17f67c334ba12cd5521a
SHA512620a138b7873df0a90e90f9633a12b7daabe34d9d112b8afa1b70328f9b7460fd60fc50032a607f8cb37ebc09791f6d3d8464e3e552877df34a60f37a4355f8d