4a5da1b9494470a4e3c88894e294104c5437df989456b1209764a5b444652d02

Analysis

max time kernel
178s
max time network
190s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
04/12/2022, 02:23

Target

4a5da1b9494470a4e3c88894e294104c5437df989456b1209764a5b444652d02.dll
Size

180KB
MD5

b484124d84114eefed6e32e5b97de8a0
SHA1

984c28db719cc975ad77f4e431e919b3cc7fc912
SHA256

4a5da1b9494470a4e3c88894e294104c5437df989456b1209764a5b444652d02
SHA512

438acc48ff2784f164ef49e33e5539fcd6d13b38289cac644f7339b9bf3a0f989e8d472c01fb6078e1b343a1ca90bf85322d4587bdd689aeb5c7e97422b31c88
SSDEEP

3072:Kn4cV8gf2u41Z5tKl4xoaePShY+dWvVJQTUsqPa7sn3Dvo:w4y8gOl2dznvUIxa7UDvo

Score

8^/10

upx

Executes dropped EXE 1 IoCs

pid	Process
4332	rundll32Srv.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

resource	yara_rule
behavioral2/files/0x0006000000022e2f-135.dat	upx
behavioral2/files/0x0006000000022e2f-136.dat	upx
behavioral2/memory/4332-137-0x0000000000400000-0x000000000045B000-memory.dmp	upx

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4712	4332	WerFault.exe	82

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 5044	2856	rundll32.exe	80
PID 2856 wrote to memory of 5044	2856	rundll32.exe	80
PID 2856 wrote to memory of 5044	2856	rundll32.exe	80
PID 5044 wrote to memory of 4332	5044	rundll32.exe	82
PID 5044 wrote to memory of 4332	5044	rundll32.exe	82
PID 5044 wrote to memory of 4332	5044	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a5da1b9494470a4e3c88894e294104c5437df989456b1209764a5b444652d02.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4a5da1b9494470a4e3c88894e294104c5437df989456b1209764a5b444652d02.dll,#1
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\rundll32Srv.exe
    C:\Windows\SysWOW64\rundll32Srv.exe
    3⤵
    - Executes dropped EXE
    PID:4332
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4332 -s 272
      4⤵
      Program crash
      PID:4712

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4332 -ip 4332
1⤵
PID:1816

C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
90KB

MD5
91b07c6f70654a26ca1cd8cde6fb2a7e

SHA1
789629859ed76191432fd7ab40cfa0487b580a6e

SHA256
37417b870c644d70c09c773b828dbb451e33d4e74df2f66d9698ae090d240d15

SHA512
077b62709e40c66304429acae5cccb953affa59791f2139d0b0e3e8a4610d38aa5dd6a44d9c857220245a9e746fb980a5dd0966d8b2795313ca7b6deeafd1dd2

Download Submit
memory/4332-137-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/5044-133-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download