kutaki | 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307

Analysis

max time kernel
145s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
03/07/2022, 21:21

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
IncomeTax_Payment_Receipt.exe
Size 636KB
Sample220703-z7apradbbl
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f
MD5 SHA1 SHA512

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://newloshree.xyz/work/son.php

Signatures

Kutaki
Information stealer and keylogger that hides inside legitimate Visual Basic applications.
stealer keylogger kutaki

Kutaki Executable 2 IoCs

resource	yara_rule
behavioral2/files/0x000800000001dabb-134.dat	family_kutaki
behavioral2/files/0x000800000001dabb-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4628	nbmonxch.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe	IncomeTax_Payment_Receipt.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe	IncomeTax_Payment_Receipt.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3060	IncomeTax_Payment_Receipt.exe
3060	IncomeTax_Payment_Receipt.exe
3060	IncomeTax_Payment_Receipt.exe
4628	nbmonxch.exe
4628	nbmonxch.exe
4628	nbmonxch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 464	3060	IncomeTax_Payment_Receipt.exe	77
PID 3060 wrote to memory of 464	3060	IncomeTax_Payment_Receipt.exe	77
PID 3060 wrote to memory of 464	3060	IncomeTax_Payment_Receipt.exe	77
PID 3060 wrote to memory of 4628	3060	IncomeTax_Payment_Receipt.exe	80
PID 3060 wrote to memory of 4628	3060	IncomeTax_Payment_Receipt.exe	80
PID 3060 wrote to memory of 4628	3060	IncomeTax_Payment_Receipt.exe	80

C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\IncomeTax_Payment_Receipt.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:464
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4628

Network

MITRE ATT&CK Matrix

Replay Monitor

Loading Replay Monitor...

Downloads

nbmonxch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\nbmonxch.exe
Size 636KB
SHA256 9b301c6642a4184267f2c62cfd2b32b0766a1e82caf699136a575ba07d3c7307
MD5 bc6618a7be87946f55d90ac92b47f0bc
SHA1 10da65cd3ba38618f83473ab6c09abaec80e8341
SHA512 d8939bb5ade4e6abda0b67f591390521ac91078727b4231e5191a473454dd5e84e9a707e8af0376d24924e6c04d85889f74c2797489cd0e1b2e6c459cacfab0f
SSDEEP 6144:u0Wnw+yGM/Bd+nBf52A2tegcHB1S4GlA9jmHv/VCSY3hw9lMbk6u1QMS0y+lqiHu:u2LfQm46A9jmP/uhu/yMS08CkntxYRLm
MD5 SHA1 SHA512 SSDEEP

Submit Download