Analysis
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max time kernel
1732s -
max time network
1479s -
platform
windows11-21h2_x64 -
resource
win11-20240802-en -
resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system -
submitted
14-08-2024 01:17
Static task
static1
Behavioral task
behavioral1
Sample
remoteaccess.pyw
Resource
win11-20240802-en
General
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Target
remoteaccess.pyw
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Size
2KB
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MD5
6cb04fe62b0ddf9cdb853f6f1ac17ea7
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SHA1
a5be1de55524c10d54f233a06b59bc269a6ef7af
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SHA256
309f31b44abac52231b009adddd15239491a78f816864f9f330ac5a3d23416f3
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SHA512
4308593317411bfb853f420f1a5adc46aac8fe42cc4397833c7c8ddb8159457f6e7fb59a9d0e7364e9496ca17867b6a93aed5c2405574e3583ff976629b11837
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 Winword.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz Winword.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString Winword.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS Winword.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily Winword.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU Winword.exe -
Modifies registry class 10 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\.pyw\ = "pyw_auto_file" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file\shell\edit OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file\shell\edit\command OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file\shell\edit\command\ = "\"C:\\Program Files\\Microsoft Office\\root\\Office16\\Winword.exe\" /n \"%1\"" OpenWith.exe Set value (str) \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file\shell\edit\ = "@C:\\Program Files\\Microsoft Office\\root\\VFS\\ProgramFilesCommonX64\\Microsoft Shared\\Office16\\oregres.dll,-1" OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\Local Settings cmd.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\Local Settings OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\.pyw OpenWith.exe Key created \REGISTRY\USER\S-1-5-21-3761892313-3378554128-2287991803-1000_Classes\pyw_auto_file\shell OpenWith.exe -
Suspicious behavior: AddClipboardFormatListener 2 IoCs
pid Process 2024 Winword.exe 2024 Winword.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2516 OpenWith.exe -
Suspicious use of SetWindowsHookEx 47 IoCs
pid Process 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2516 OpenWith.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe 2024 Winword.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2516 wrote to memory of 2024 2516 OpenWith.exe 85 PID 2516 wrote to memory of 2024 2516 OpenWith.exe 85
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\remoteaccess.pyw1⤵
- Modifies registry class
PID:3172
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2516 -
C:\Program Files\Microsoft Office\root\Office16\Winword.exe"C:\Program Files\Microsoft Office\root\Office16\Winword.exe" /n "C:\Users\Admin\AppData\Local\Temp\remoteaccess.pyw"2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2024
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Microsoft\Templates\LiveContent\16\Managed\Word Document Bibliography Styles\TM02851223[[fn=iso690]].xsl
Filesize263KB
MD5ff0e07eff1333cdf9fc2523d323dd654
SHA177a1ae0dd8dbc3fee65dd6266f31e2a564d088a4
SHA2563f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5
SHA512b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d
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Filesize
16B
MD5d29962abc88624befc0135579ae485ec
SHA1e40a6458296ec6a2427bcb280572d023a9862b31
SHA256a91a702aab9b8dd722843d3d208a21bcfa6556dfc64e2ded63975de4511eb866
SHA5124311e87d8d5559248d4174908817a4ddc917bf7378114435cf12da8ccb7a1542c851812afbaf7dc106771bdb2e2d05f52e7d0c50d110fc7fffe4395592492c2f