Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 17:54
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe
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Size
38KB
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MD5
e4c6a8f52933f59cf9ebaa0d02b08605
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SHA1
82686aec00ab89206d9fcbf0d075bf962d82bf31
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SHA256
1fb8f384acd6b115069de35936ed4bf7f49f278a28e33692a429f0fe8bd88d60
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SHA512
5885cc8d1666217a1e4e16e7474dff565c0fb1583a0661396041afc561a4b6305b0be6560ec76f663f39b3b4b229f9c39d601e52f49f88c763295c8dd1658eba
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaac4HKcfu:X6QFElP6n+gJQMOtEvwDpjBsYK6u
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:
2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 3924 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:
2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exedescription pid process target process PID 3032 wrote to memory of 3924 3032 2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe asih.exe PID 3032 wrote to memory of 3924 3032 2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe asih.exe PID 3032 wrote to memory of 3924 3032 2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_e4c6a8f52933f59cf9ebaa0d02b08605_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3032 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3924
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5c4135408616ee1cc3489b8a4c7fa7430
SHA11aedb704a79533f2aa30dea225f840343ad73985
SHA256b7fa2af11cdb384de80294c68d9042f0b5321a8f619ccb2c4ebc61180cedf2b7
SHA512b30a5153b8955ef03153f538d5d66b14d05faefb029aeeba373f15e529024ebe871608ee1531697b4947589a5b6a7515e46a0a6ee338c0181c8db84ea3ab57c3