Analysis
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max time kernel
136s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 15:35
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe
Resource
win7-20231129-en
General
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Target
2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe
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Size
37KB
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MD5
62d68d09fb35f9470bcef39eabf2d54c
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SHA1
37251773e948e396c945fa745a7d6f8b129f5731
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SHA256
b96ac8ee879f95718d8b527e085a5be825768cda2471a18150c1d6e310a2d00e
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SHA512
f4cfac5c7c8677e11c4d060ffb88547c6474188c4acb4d543ce97ff0566a01980896d930374c563459549aa8fe585a83930cb466bc888b94f4ec5de486141099
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HKcf24:X6QFElP6n+gJQMOtEvwDpjBsYK624
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2428 asih.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
Processes:
2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exedescription pid process target process PID 4932 wrote to memory of 2428 4932 2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe asih.exe PID 4932 wrote to memory of 2428 4932 2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe asih.exe PID 4932 wrote to memory of 2428 4932 2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_62d68d09fb35f9470bcef39eabf2d54c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4932 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2428
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
37KB
MD5c4b801dd9e4e5b383d3d5dc8f9675f1d
SHA11f2668346dfce820d443b507eb3cc91543272f9d
SHA2562d45d613170e6c4c62f20cf69bfd9d6cc6d35c67a108b95cfccae8316ea8fafd
SHA5124cce3f6a4e0ce4645488faef1a20ee96e3351c2fc845bf60e13da668af9a43a22c4dead2d7b9563a14d37a210f19628c53802e64665d285f17b3e880c9e7a748
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memory/2428-18-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
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memory/2428-17-0x00000000006C0000-0x00000000006C6000-memory.dmpFilesize
24KB
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memory/4932-0-0x0000000000660000-0x0000000000666000-memory.dmpFilesize
24KB
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memory/4932-1-0x0000000000660000-0x0000000000666000-memory.dmpFilesize
24KB
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memory/4932-2-0x0000000000810000-0x0000000000816000-memory.dmpFilesize
24KB