Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
09/06/2024, 07:32
Behavioral task
behavioral1
Sample
2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe
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Size
71KB
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MD5
93c09ea5cb023c1616718babd6c4427d
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SHA1
8886503aaabe59761e8bfaebe956c71bedab8d63
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SHA256
5aa4480175c4d9c03906a1aa5f67655f03a71cc90574430642651ebc078de9f8
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SHA512
490df6151e4041454c468e1b636c926f115eb3e82a49d5caa0f63447dabe38d099513ff97ddbeafb854b3d68f40a249c22a1b030f452612f388d726f7cec4dda
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SSDEEP
1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQALz:78SEOtEvwDpjWYvQd2PP
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3148-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002328e-16.dat CryptoLocker_rule2 behavioral2/memory/2248-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3148-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3148-19-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002328e-16.dat CryptoLocker_set1 behavioral2/memory/2248-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3148-28-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3148-19-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000700000002328e-16.dat UPX behavioral2/memory/2248-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3148-28-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
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 2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3148 asih.exe -
resource yara_rule behavioral2/memory/2248-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3148-19-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000700000002328e-16.dat upx behavioral2/memory/2248-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3148-28-0x0000000000500000-0x000000000050F000-memory.dmp upx -
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 2248 wrote to memory of 3148 2248 2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe 82 PID 2248 wrote to memory of 3148 2248 2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe 82 PID 2248 wrote to memory of 3148 2248 2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_93c09ea5cb023c1616718babd6c4427d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2248 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3148
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5b94a2939730bddcc3d27e84ab3952d92
SHA1926b21a23054202aacd465a545068355b4c00e9a
SHA256ed8eb2d33d336273f3b954b87ef2c27a5a79534d7eca2bab793737bca3c2466a
SHA512967d8da0a2ec50b1a4a555043071e4b2b640ce52fe8306f2809a5938f3a10127ff3ecfd00fe50f0bed3d0bc885d672849b8dfa48b53b9935b4cf8bc7fbe5a90b