905e7a135834baf2f139e57b3ba4e59892684221d3132ff6463ad1902a0b11cd

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 16:48

Target

91vpn(3.5.4)/91vpn/vpnutil.dll
Size

750KB
MD5

2a85f60ed95582d66ebedeec374ea64e
SHA1

ad1b515b0b72e6d51563e89f40b23e62630c39de
SHA256

163399e825d23c9c019a9bd03a58328d365a5fc9f80af1e516ca7412de2c49e6
SHA512

cb2766a0bcd7f6979831f004e84b15df18ba33ad11d6ce20b6432845074e8249de72c906cd4900576831c21d09940b9e30b701db839b0aba299ff364d9e8b458
SSDEEP

12288:3ysfcCzYEjeYL89XikxFkPBs+OeO+OeNhBBhhBBdlrYj5cEwmco0LgUdj:lzYERL89XikxFkPnYj5zwmd0LgUdj

Score

7^/10

Loads dropped DLL 1 IoCs

pid	Process
1756	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\91vpn.log	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1984	1756	WerFault.exe	28

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 2060 wrote to memory of 1756	2060	rundll32.exe	28
PID 1756 wrote to memory of 1984	1756	rundll32.exe	29
PID 1756 wrote to memory of 1984	1756	rundll32.exe	29
PID 1756 wrote to memory of 1984	1756	rundll32.exe	29
PID 1756 wrote to memory of 1984	1756	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\91vpn(3.5.4)\91vpn\vpnutil.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\91vpn(3.5.4)\91vpn\vpnutil.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1756
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1756 -s 228
    3⤵
    - Program crash
    PID:1984

\Users\Admin\AppData\Local\Temp\2D09.tmp

Filesize
43KB

MD5
51138beea3e2c21ec44d0932c71762a8

SHA1
8939cf35447b22dd2c6e6f443446acc1bf986d58

SHA256
5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

SHA512
794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

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