Analysis
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max time kernel
150s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220331-en -
submitted
05-04-2022 02:18
Static task
static1
Behavioral task
behavioral1
Sample
63aaf7e9b28cc5f9a48891e99256d866.docx.vir
Resource
win7-20220331-en
windows7_x64
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
63aaf7e9b28cc5f9a48891e99256d866.docx.vir
Resource
win10v2004-20220331-en
windows10-2004_x64
0 signatures
0 seconds
General
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Target
63aaf7e9b28cc5f9a48891e99256d866.docx.vir
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Size
12.5MB
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MD5
63aaf7e9b28cc5f9a48891e99256d866
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SHA1
c3524aac7885c96c8ef8badeeb6a28037d964dff
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SHA256
d6273f528ad9fe35b2d8d46521359d5d19ff6c3fba44da01a1fd23796905be92
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SHA512
7d60abf1e4b8010f88ea11dd04a5edca43a1d9743b23aa60fce2433ab47d1dd88d29a7b0c7881aa26124e4fd9c8e4818f82b741e946726fddc95689585d4e388
Score
3/10
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 10 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file\shell\Read rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file\shell\Read\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\.vir\ = "vir_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\vir_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000_CLASSES\.vir rundll32.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
pid Process 900 AcroRd32.exe 900 AcroRd32.exe 900 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1660 wrote to memory of 820 1660 cmd.exe 29 PID 1660 wrote to memory of 820 1660 cmd.exe 29 PID 1660 wrote to memory of 820 1660 cmd.exe 29 PID 820 wrote to memory of 900 820 rundll32.exe 30 PID 820 wrote to memory of 900 820 rundll32.exe 30 PID 820 wrote to memory of 900 820 rundll32.exe 30 PID 820 wrote to memory of 900 820 rundll32.exe 30
Processes
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C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\63aaf7e9b28cc5f9a48891e99256d866.docx.vir1⤵
- Suspicious use of WriteProcessMemory
PID:1660 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\63aaf7e9b28cc5f9a48891e99256d866.docx.vir2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:820 -
C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\63aaf7e9b28cc5f9a48891e99256d866.docx.vir"3⤵
- Suspicious use of SetWindowsHookEx
PID:900
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