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Analysis
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max time kernel
148s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
04/10/2024, 18:01
Behavioral task
behavioral1
Sample
2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe
Resource
win7-20240704-en
General
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Target
2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe
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Size
39KB
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MD5
537388688f026d9a5299d3381c832b5f
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SHA1
3022c6c23150afcc587fcb4eb45e4a8c78608da6
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SHA256
2ed2007649f8d866a40df12642d7daaab5328770c0f14e5399130c9bf2a885db
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SHA512
a3c59d2b36b27203b16f520dd2360d071ed91452e962accb12ec9357d09de2d371f440d42216c0b706b0e61723c50bc2c59f9de125a0ae5c961b2c53e6319638
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkIT3:qDdFJy3QMOtEvwDpjjWMl7T3
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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation 2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 5016 asih.exe -
resource yara_rule behavioral2/memory/4948-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0009000000023410-13.dat upx behavioral2/memory/4948-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5016-27-0x0000000000500000-0x0000000000510000-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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language asih.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4948 wrote to memory of 5016 4948 2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe 82 PID 4948 wrote to memory of 5016 4948 2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe 82 PID 4948 wrote to memory of 5016 4948 2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-10-04_537388688f026d9a5299d3381c832b5f_cryptolocker.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4948 -
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:5016
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
39KB
MD5ab3d6a4f75cc7a4d58fad1eb1470c711
SHA1754916b19614e7bd0d3f98040a5b11bbf16c8484
SHA256552de69e8d7294cc2e1c26d9baf9d47b00e2326e7bd258c4637adeecf51174ef
SHA512eb0c2ffd613ec2bba1418e5c64b36e920dc131a20fb1d9126e7b0ada47a3e7f79f4a1074ff5096450cca2df2974a3b72c308295a7d01e0c3f0a3404842ce851a