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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
06/03/2024, 05:45
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe
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Size
46KB
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MD5
414d3d9ef97fb36290cf05571de4dfa8
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SHA1
0888d4e9131fee41f437603d646aada4f822a398
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SHA256
1e1b3a6dc8a201a3c4c76c974c91ce45a3e106e236aadc890cd4e47216d00326
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SHA512
00137c776e250f63ec62a284c23099954c5221ebeef8f887d13df23719245bcfcb8b8dce98d38798247dd2fe81877d3d826fc2e7e252505e9a01aa6767af5772
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mobpr:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ3
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1892-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000400000001e5eb-13.dat CryptoLocker_rule2 behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1892-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000400000001e5eb-13.dat UPX behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4764 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
description pid Process procid_target PID 1892 wrote to memory of 4764 1892 2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe 88 PID 1892 wrote to memory of 4764 1892 2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe 88 PID 1892 wrote to memory of 4764 1892 2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1892 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4764
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
46KB
MD54f3e334cd132ca464b786aa85327bf4a
SHA1b653644ec24a118d57a257b93dda038b66d559c7
SHA25635d16c70121b34cfa13e8211cb7167ec177c46c11de9be857b508b6d14291b8e
SHA51252ff1e73cd8deddc46c776c737b7fe28d83966e6a3e8ba9cf892229def8512733a41b7f471dc45c79a967fc378a1d7fc3fc31ecd376a0ba0b1b50bfc7a9558b2