Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
31-10-2024 08:24
Behavioral task
behavioral1
Sample
2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe
Resource
win7-20240903-en
General
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Target
2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe
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Size
37KB
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MD5
4bb7c21f363e30dadc518dd956fc90b5
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SHA1
c75a52696a835fd453867186461e21158622c7c3
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SHA256
d7e6940103fdd9a0a7b693b42dd7c15aff312539101c62863a91e4d68ba99117
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SHA512
0722f3b9c84fe55d3f8da4f14e3345e65a44265d1ceb7d95bf61d0771bc063d1d0e61010260413753db385b0458d32fe946ac68843c680bda0049ad135b2b0c1
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITo:qDdFJy3QMOtEvwDpjjWMl7To
Malware Config
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exedescription ioc Process Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation 2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid Process 1068 asih.exe -
Processes:
resource yara_rule behavioral2/memory/4872-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000c000000023b99-13.dat upx behavioral2/memory/4872-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1068-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exeasih.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language asih.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exedescription pid Process procid_target PID 4872 wrote to memory of 1068 4872 2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe 86 PID 4872 wrote to memory of 1068 4872 2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe 86 PID 4872 wrote to memory of 1068 4872 2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-31_4bb7c21f363e30dadc518dd956fc90b5_cryptolocker.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4872 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1068
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5889381b89a993a33974452fc2a955f76
SHA1058042224fb31a84256c0df9a4733832fdfc23dc
SHA25609e6fce9c2a2190ee214f20d365bddecea30af35ad73576a5fac68bd52575d81
SHA51218d3b3079de8abc1bad4e1a3827256fc11b3793c56bddd98a9db119b7a804d948b72ee847e0d7323c83244857591a435528416496ee6deda014559289b6e9fc9