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Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
01/02/2024, 15:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
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Size
48KB
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MD5
5e5fca34a2985db7e47f240b4587d25a
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SHA1
b1e61412f4f0c007ed53b70944a4d190a509c1b0
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SHA256
28d15af47253c8e74cdc4ee24dc6bae93c510a08d33ecc7e8577b4e456bd1189
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SHA512
0dfa017c4563597c7dbc0b318e4e28651ee2d6bfee59b28c7298e4bb0b9e929b9c8cc5023a063f0e3c04045e157a2053e7d8cf1cab8fe5e3dcdcc94238f5f58a
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SSDEEP
768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTB52Y:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6uY
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000231f2-13.dat CryptoLocker_rule2 behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00070000000231f2-13.dat UPX behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4864 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 4172 wrote to memory of 4864 4172 2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe 85 PID 4172 wrote to memory of 4864 4172 2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe 85 PID 4172 wrote to memory of 4864 4172 2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4172 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4864
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
48KB
MD50ba1fb1d297df4eaf8c1d149417ea4ac
SHA1cba4713dc2e2637e9ae9861daca964cf6df60503
SHA25643742b6dba8fc49c86ef70861c9bedff5aac08ab12c9df95b615462e5e0c6120
SHA512407a725fb75273d0f776fb34b4e1ccf5a53916614d8068c52774e814024c197ed87075c9516bbb74b1576b557d95edd61ab6a5213037f8f4258cfeafca7afc0d