Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
02-05-2024 01:18
Behavioral task
behavioral1
Sample
2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe
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Size
38KB
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MD5
f4213f0853e31228022156858625c379
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SHA1
bdfbdca27526bdec8ab9eea008e8025871d50689
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SHA256
3dae8f1360ea93ea89f7f7cbb893efa3294ae849c8a50956fce5bd3cbbd5fbaa
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SHA512
a53a2cb9a9a041d44ab552bbfb8f29b9708aad155d0875630d985885277e32194e944a0fedb3a03c2d8ecf0d46bd25ae0a67973fb670eea62ab6dbd878766c92
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYe:qDdFJy3QMOtEvwDpjjWMl7T/
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/5096-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d000000023ae7-13.dat CryptoLocker_rule2 behavioral2/memory/5096-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4808-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4808-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/5096-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000d000000023ae7-13.dat CryptoLocker_set1 behavioral2/memory/5096-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4808-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4808-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/5096-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000d000000023ae7-13.dat UPX behavioral2/memory/5096-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4808-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4808-27-0x0000000000500000-0x0000000000510000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation 2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4808 asih.exe -
resource yara_rule behavioral2/memory/5096-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000d000000023ae7-13.dat upx behavioral2/memory/5096-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4808-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4808-27-0x0000000000500000-0x0000000000510000-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 5096 wrote to memory of 4808 5096 2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe 83 PID 5096 wrote to memory of 4808 5096 2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe 83 PID 5096 wrote to memory of 4808 5096 2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-02_f4213f0853e31228022156858625c379_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5096 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4808
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5e547b845318136528e4979ab157d0381
SHA1719e2d2de5a3e345ed683acde5efbfb8e2c30ec7
SHA2564f0c75062cbfa8b8ba0fab15ed3366fcd09e1e0f857b083f792dbdddbc15c91d
SHA512c8435ce0ecf61ff26fdacc1d7a032137326f80f11c23f05cef888988e9a5698c48f5072f779e79db0997b0debfddf41e91c52599d399100d301f440114a73ae1