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Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
15/06/2024, 07:37
Behavioral task
behavioral1
Sample
2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe
Resource
win10v2004-20240611-en
General
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Target
2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe
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Size
33KB
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MD5
72eff5ee9b92c90f650764c0cbd7cbb3
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SHA1
623ae89cc0d0bc5918907cb2954332998d3e55b1
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SHA256
ad4de6c98b3f7a8071af3687c3238ce6b3ee6d885de911b41d8b417450985c98
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SHA512
a5e7c1b9cafb6c92e73062682462fea15799932d0a1aad35b5962a10e574ac2cafd14b9890e1ac84b67ac5c8fc11559879c1f1fec6aaab6fc14cd18d6fc4affe
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SSDEEP
768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+w:bRO2wZEjbnouy8Gv6iH/NLpN
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00060000000232b0-13.dat CryptoLocker_rule2 behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 3 IoCs
resource yara_rule behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp UPX behavioral2/files/0x00060000000232b0-13.dat UPX behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-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-1-5-21-3169499791-3545231813-3156325206-1000\Control Panel\International\Geo\Nation 2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4580 rewok.exe -
resource yara_rule behavioral2/memory/2356-0-0x0000000000400000-0x000000000040D000-memory.dmp upx behavioral2/files/0x00060000000232b0-13.dat upx behavioral2/memory/4580-18-0x0000000000400000-0x000000000040D000-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 2356 wrote to memory of 4580 2356 2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe 82 PID 2356 wrote to memory of 4580 2356 2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe 82 PID 2356 wrote to memory of 4580 2356 2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-15_72eff5ee9b92c90f650764c0cbd7cbb3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:4580
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
33KB
MD5cc1f1b45ac56b31982c3cb8357e3be2c
SHA161f1e69ec1d63b348568c562e0aeee67aee6d5a9
SHA256d2883988366d112a21b2ce15499c5f30a60e24f8082897a4312824ef83c5990a
SHA5127e04318764ece5aa546db83aaaf40f4493bed2d944595ebe5c2c2b8380632fbabc353879d212758b32685ddbcd1ff825189bfd73210f099c80a07e985eef8a32