Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 04:39
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe
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Size
39KB
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MD5
19c3eb939ebe5587e12f5429b99fd4b8
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SHA1
f1b099aa45769c7cdb3d6fc24e6170a6638f22b0
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SHA256
7a46913b08a642afb020f454221cc373ec69e2d01bf0277f4741a785b3f7748f
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SHA512
c1703d9186f4d2bb35fc717f4880ca15c19d85cfb0a3d9d713c934c5dbecb45a42b212fc40c975beb08bc1ac1e579d2040cc1b9d038b99dae946491539e04559
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IujdxNX6vL:b/yC4GyNM01GuQMNXw2PSj1Pqq8BC
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002328e-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3920 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 4808 wrote to memory of 3920 4808 2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe 81 PID 4808 wrote to memory of 3920 4808 2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe 81 PID 4808 wrote to memory of 3920 4808 2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_19c3eb939ebe5587e12f5429b99fd4b8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4808 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3920
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5f98a52514e9b516189538c7c20d99e18
SHA18b0c89bade776f64c05845e917bc911ab316514c
SHA2566712790403b2981a9b66f0e9fbad8903ef90d18c8e27d3a1a0eb3ff6fac020d1
SHA512616fef4fe7118d7b0e529e4cc3ec4b24ae0e3372aa224576171d5a4641a7f5fabf4a8165bd6b58b99320d551f277a22cfb3c3581452128483d31b510480c2448