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Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240220-en -
resource tags
arch:x64arch:x86image:win10v2004-20240220-enlocale:en-usos:windows10-2004-x64system -
submitted
20/02/2024, 11:43
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
Resource
win10v2004-20240220-en
General
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Target
2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe
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Size
39KB
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MD5
bda97fa11f49c0a13bf90d913747ba84
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SHA1
c80899b6bb74cc178115debe04f1a907e4b37a94
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SHA256
8604f1c36999d9f419384b1226da7648d3db699405468a0f399e15cc1036ed83
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SHA512
1d6313ed3b7f1fd8928ba854767366739214f48ddd77ab4aaeac16fc06f73ec3eefafd23628ce078a2a7dab684b3d0d7f933012e91090970579b77047a0856ed
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlE2Pn:b/pYayGig5HjS3+2P
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00080000000231e8-12.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-1-5-21-1888637039-960448630-940472005-1000\Control Panel\International\Geo\Nation 2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5012 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 720 wrote to memory of 5012 720 2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe 86 PID 720 wrote to memory of 5012 720 2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe 86 PID 720 wrote to memory of 5012 720 2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_bda97fa11f49c0a13bf90d913747ba84_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:720 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:5012
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5b7f1a137afa6ca414d1cc2f35a9c2781
SHA10ebeb9dc09f9b6c3574b60c72510052b688de401
SHA256f21312942d2ebbd82195f807f5dc76a95daef2a3bfada419bf79ee5f73196f01
SHA5121643f91b9f0b6642a155e4ae8e6b08c7754bea4fb8c57e3b44dff97e01b07cabacb77964b5e7f7a6597cae4f742ea70c043e8638b0d85b449ddf2b9604e0a427