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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
05/10/2024, 23:30
Behavioral task
behavioral1
Sample
83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
Resource
win7-20240903-en
General
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Target
83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
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Size
55KB
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MD5
b517822aff15eafcf704dda1cd11fa7b
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SHA1
ac9260db25f10ae2a1b5982e5bd5d7c2675ba702
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SHA256
83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9
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SHA512
fd05862a546995d8cc78839d2b3e0ddc386a7117da71e9d5c3203f84f4ae063b60bfbf5a302eb42c4206a290bc97b0e88819dfd3d125af214ab70bd146978ceb
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SSDEEP
768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8w:b7/y28wZEjbnouy8G76iH/NLpB
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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation 83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe -
Executes dropped EXE 1 IoCs
pid Process 2208 rewok.exe -
resource yara_rule behavioral2/memory/3688-0-0x0000000000400000-0x000000000040E000-memory.dmp upx behavioral2/files/0x000a000000023464-13.dat 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 rewok.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3688 wrote to memory of 2208 3688 83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe 82 PID 3688 wrote to memory of 2208 3688 83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe 82 PID 3688 wrote to memory of 2208 3688 83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe"C:\Users\Admin\AppData\Local\Temp\83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3688 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2208
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
55KB
MD5edeb5cb3d0092e67f02006d20478c555
SHA13586d2c03004e5e7de7b1a27203f325c31b63d06
SHA256227771a5f91471aeec82893c4c8f0a743d77adf541f17708a83cca1ee73d08b3
SHA512aa1fc907d9d8367c6168891bbb6a4748799566aae4e192e7c06d87117cab0642af51590157d0b273fb04032bd9290c24856393da13715d9c95024490a6ff4a9b