Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
26/05/2024, 03:49
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe
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Size
37KB
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MD5
a4382c7cb6ed8dcc66e116f2bea41d88
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SHA1
64deb3050c45b353fbbd2a8abbc3d5bbd207c465
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SHA256
712317968045922180b805ae86ace11c89ce237dc0ec1dc1d1b01bacdb9923be
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SHA512
944252ddea5b05c1191e651cb2e4b6b72c516dcf045d90cb1b54c983970f97e2996663c5433d534b755c9dbb2a578e282076d54fb8de92152e0bf91b4e0f5a8c
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SSDEEP
384:bA74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUqMV6U8zKvGaLigYqVwX1q6i:bA74zYcgT/Ekd0ryfj86U8zbUYqSFq6i
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000022f51-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1308 hasfj.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 4928 wrote to memory of 1308 4928 2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe 83 PID 4928 wrote to memory of 1308 4928 2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe 83 PID 4928 wrote to memory of 1308 4928 2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-26_a4382c7cb6ed8dcc66e116f2bea41d88_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4928 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:1308
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD5895c63111680a899c6a9a89236eef708
SHA1bb76e40b9f8630defefb512b7c1f16a0c4c25315
SHA2564cc276eba9b392a711c5852dfe4a84dd621cdc67e35a025636bcbb4595f95f84
SHA51213320d9f5effcd4d15c07f63e71fe7c1bd1b0767235d7e5b03df9a89b30770c186b45fd741f932cd79bd4b8639a65b76a65243ce8fabc00ec95232d826d21a1a