965616976ed28bffd24f8316ba6bad5d6008dc511c757643f038bc6c57c37e2b

Analysis

max time kernel
116s
max time network
169s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 21:44

Target

cygwin1.dll
Size

500KB
MD5

405424a7869cf6a03fdc50871bd1fd42
SHA1

197b549de251578c4a8f57f80fc45c87149b0836
SHA256

9f04175a6f348948783ef9200d78fbbc8b82a904ce6980d8349284d1e011f495
SHA512

a5677204bc2eea54c64593dc3849e4de924128b486ace9e142e1bf18fcaa694fdf8c38597585b442659fab8461e6158aba4fabd4b073d45eb0e565e5983ad324
SSDEEP

12288:jWhhoRJLk0u0b+e7JtNkUlEDeS4Xa6p2e0mYPTb:qSRm0u0b+oDl9Xa6I1mYPTb

Score

7^/10

upx

UPX packed file 4 IoCs

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

resource	yara_rule
behavioral22/memory/1636-0-0x0000000061000000-0x000000006126B000-memory.dmp	upx
behavioral22/memory/1948-1-0x0000000061000000-0x000000006126B000-memory.dmp	upx
behavioral22/memory/1636-2-0x0000000061000000-0x000000006126B000-memory.dmp	upx
behavioral22/memory/1948-3-0x0000000061000000-0x000000006126B000-memory.dmp	upx

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5012	1948	WerFault.exe	94

Modifies data under HKEY_USERS 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions\Cygwin	rundll32.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Cygnus Solutions\Cygwin\mounts v2	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 1636	4392	rundll32.exe	90
PID 4392 wrote to memory of 1636	4392	rundll32.exe	90
PID 4392 wrote to memory of 1636	4392	rundll32.exe	90
PID 1636 wrote to memory of 1948	1636	rundll32.exe	94
PID 1636 wrote to memory of 1948	1636	rundll32.exe	94
PID 1636 wrote to memory of 1948	1636	rundll32.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cygwin1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cygwin1.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\cygwin1.dll,#1
    3⤵
    - Modifies data under HKEY_USERS
    PID:1948
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 736
      4⤵
      Program crash
      PID:5012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1948 -ip 1948
1⤵
PID:2780

memory/1636-0-0x0000000061000000-0x000000006126B000-memory.dmp

Filesize
2.4MB

Download
memory/1636-2-0x0000000061000000-0x000000006126B000-memory.dmp

Filesize
2.4MB

Download
memory/1948-1-0x0000000061000000-0x000000006126B000-memory.dmp

Filesize
2.4MB

Download
memory/1948-3-0x0000000061000000-0x000000006126B000-memory.dmp

Filesize
2.4MB

Download