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Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
15/04/2024, 09:56
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe
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Size
36KB
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MD5
8c27b54c42a9973e86315a04d4efd337
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SHA1
351114bb7538a8196c10fb911f71f26cf3887667
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SHA256
bea795bea1e9d040fe321e4363254fab1a2688b8eb61d037098762345e784fee
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SHA512
6b5e599e66793b4ecdc0a59bea7f97bf22ad2959af4fc8cb0817428a21c6b19aff3465cb08418f83283d347d152433baf89215f37e9b1465c4e89f381bfaa824
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHC02ltAUACe:b/pYayGig5HC02gbCe
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000800000001db0e-12.dat CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation 2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 964 retln.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2680 wrote to memory of 964 2680 2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe 84 PID 2680 wrote to memory of 964 2680 2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe 84 PID 2680 wrote to memory of 964 2680 2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-15_8c27b54c42a9973e86315a04d4efd337_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2680 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:964
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
36KB
MD54056a0f9d24fac7f3fea3e9576640b1d
SHA16edb79530c61e73c4bcbadb7eb8764a470a4744b
SHA25663895bd98b56665ec385bb92d1c8fcef41f4702be082c8c4fe84f6373331aafd
SHA5125dfbf22c8fb2da29ccc83c9e22b480a1eb3ec69f5ca46fc26d595c5793990d81cb5a8e5d6ce6776a4f424e034fc7ba46c617bceb97f02ee7467e7f098c0cf306