Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2024 15:51
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe
Resource
win7-20231129-en
General
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Target
2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe
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Size
39KB
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MD5
d4c8718e9141a225c4924a133004b83f
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SHA1
be12a7dbfdaa8bc4470b9d6d639e88cd21e3a071
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SHA256
ac24ef111464615583f608b1dc0b8e8810d0ca7474acbefa0f2ed927ccc0fe20
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SHA512
01a440e0a4abda0d1bdc7424ba1dc4b325b995ee25f7ca87a9646b791b5f2450a2e6d34d16a42e9493046bb001ce21a8de7cfe3c27ac3d375d5b8f1f9b86b1ff
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SSDEEP
768:bgX4zYcgTEu6QOaryfjqDDw3sCu5b+rc5vrN:bgGYcA/53GADw8Clrcv
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\hasfj.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
hasfj.exepid process 624 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
Processes:
2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exedescription pid process target process PID 4656 wrote to memory of 624 4656 2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe hasfj.exe PID 4656 wrote to memory of 624 4656 2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe hasfj.exe PID 4656 wrote to memory of 624 4656 2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe hasfj.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_d4c8718e9141a225c4924a133004b83f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4656 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:624
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\hasfj.exeFilesize
39KB
MD50607e404bf9b36482075c24e06f6dbf3
SHA1e1c06555302bae5562ebe96cec4505e5d3ae2ddf
SHA2563c3082e5c1303a144ed83a802d28bb040d5705e9c6f47525c2a5a102369b76f1
SHA5124b46ebaa3eb14af24ed9960c374b9e3aec8d66f52efb1d8294c5b726ae55a81f4d5c5681897c5409be54d5d65bb15517eb336a2ef30bcac97cd55fce912c7851
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memory/624-18-0x0000000002ED0000-0x0000000002ED6000-memory.dmpFilesize
24KB
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memory/624-17-0x0000000002090000-0x0000000002096000-memory.dmpFilesize
24KB
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memory/4656-0-0x0000000002260000-0x0000000002266000-memory.dmpFilesize
24KB
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memory/4656-1-0x0000000002260000-0x0000000002266000-memory.dmpFilesize
24KB
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memory/4656-2-0x0000000002310000-0x0000000002316000-memory.dmpFilesize
24KB