Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 23:09
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe
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Size
47KB
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MD5
58f4c7e33ffbef347607ecf1dbe9902c
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SHA1
a889a5587bfac2491f69a36a5830f63fdadd4a70
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SHA256
c5eca73b2d41e179057e0ee240edf4d4801449c24c15d05081dd514b0208eb12
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SHA512
2c29bf76d1155baa36b0f75438ae7ae6d5ce24b87b59754059af26e36317be710b4583ebe4d0dcbface888c7b88908728c05adf051e50015291a0d58221ee914
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SSDEEP
768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/DpkcU:P6Q0ElP6G+gJQMOtEvwDpjB8WMlfU
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1040-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002327d-13.dat CryptoLocker_rule2 behavioral2/memory/1040-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1624-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1624-27-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1040-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002327d-13.dat CryptoLocker_set1 behavioral2/memory/1040-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/1624-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/1624-27-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation 2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1624 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 1040 wrote to memory of 1624 1040 2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe 81 PID 1040 wrote to memory of 1624 1040 2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe 81 PID 1040 wrote to memory of 1624 1040 2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_58f4c7e33ffbef347607ecf1dbe9902c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1040 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1624
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
48KB
MD5a213790a338b42761bc10f0811cac32e
SHA1e51621858dbc1a4895d663fb27bf5fea540df19b
SHA256c1b30fe057607588b0bc8ece7c925f29e832c6e832001b9768f1658fd1a3e251
SHA5126c83b6414a3cda7da4e2648c82e410ba241bb1d83ee32570ebba5b49f060df4fd963484addf03a94b54a98a559f4a72a3c319f7d4178e69650bda2b20ae9bac5