Analysis
- max time kernel
149s - max time network
99s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system - submitted
02/06/2024, 22:29
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe
Resource
win7-20240508-en
windows7-x64
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe
Resource
win10v2004-20240426-en
windows10-2004-x64
9 signatures
150 seconds
General
- Target b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe
- Size 79KB
- Sample240602-2ef26sad94
- SHA256 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5
- MD5 83c5ae72482d3aa72b5823112d32cbfc
- SHA1 01a6734fa5d5670df0497381814734a0f286f558
- SHA512 ba72d4278b33a5c20525c5700771d079c2a4fa395a96a1bc7c8652cdc1a230731811eb71bd9ea591a2a691e7810539c270ac1e1d5e6880418e4dec7306e976e1
- SSDEEP 1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOhEbGY:GhfxHNIreQm+Hi2EbGY
- MD5 SHA1 SHA512 SSDEEP
Score
7/10
Malware Config
Signatures
- Executes dropped EXE 1 IoCs
pid Process 2028 rundll32.exe - Modifies system executable filetype association 2 TTPs 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" rundll32.exe Key created \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe - Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\¢«.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe File opened for modification C:\Windows\SysWOW64\notepad¢¬.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe File created C:\Windows\SysWOW64\notepad¢¬.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe File opened for modification C:\Windows\SysWOW64\¢«.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe - Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\system\rundll32.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe File created C:\Windows\system\rundll32.exe b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe - Modifies registry class 15 IoCs
description ioc Process Key created \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1717367379" rundll32.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1717367379" rundll32.exe Key created \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command rundll32.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" rundll32.exe Key created \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Key created \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Key created \REGISTRY\MACHINE\Software\Classes\MSipv rundll32.exe Key created \REGISTRY\MACHINE\Software\Classes\MSipv b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" rundll32.exe - Suspicious behavior: EnumeratesProcesses 28 IoCs
pid Process 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2028 rundll32.exe - Suspicious use of SetWindowsHookEx 3 IoCs
pid Process 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 2028 rundll32.exe 2028 rundll32.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3968 wrote to memory of 2028 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 85 PID 3968 wrote to memory of 2028 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 85 PID 3968 wrote to memory of 2028 3968 b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe 85
Processes
-
C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe"C:\Users\Admin\AppData\Local\Temp\b8fabf807efe6c0b712c20ded166d12c182f5a76e3adc352f2f9a6fcdf9defb5.exe"1⤵
- Modifies system executable filetype association
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3968 -
C:\Windows\system\rundll32.exeC:\Windows\system\rundll32.exe2⤵
- Executes dropped EXE
- Modifies system executable filetype association
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2028
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Windows\SysWOW64\notepad¢¬.exe
- Size 75KB
- SHA256 65143cdf6c14f3871f0d3f4232454daa042cba66aab4a1d7f3a6d3250a15a313
- MD5 76d34b0faf8a356668d0dbd909594cdf
- SHA1 1b0463ae732fd461deae7598251403d8e4a91e9a
- SHA512 d0c4a12057d1375fde6fa47d187bc60c7b5d6f62b17bfc7fb9f449ab98d3297937b88aec966ac1a4d862c7d0f99aba47b00ee65e538ecc062b5b7fd08e417cc6
- SSDEEP 1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWO+CJ:GhfxHNIreQm+HifCJ
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System\rundll32.exe
- Size 82KB
- SHA256 a6fe2f464ab5a693b37c56da0469eb10ec9303011afe6a51b3c478741d379f4e
- MD5 388dd5f4b72ad505c9fca603739aa82c
- SHA1 75bf92c7bb8793e6dd9821e99bcf0b152bb7ef89
- SHA512 420046fd105093f6db82ee4edf7f46a5b95155d2f9135c45b5d1ed628a3e8a3a017bc5d60a776d12c1fa27fe097a3acc47540642a951c572ffde975a081eb789
- SSDEEP 1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOrLAdFeq9:GhfxHNIreQm+Hi8LAdFeq9
- MD5 SHA1 SHA512 SSDEEP