kutaki | 03e067b68230dd9da8e74c905e862dd1f7c094a35606405d4e426f8ba02981bc

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/09/2022, 00:44

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General

Target
Payment_Receipt.exe
Size 812KB
Sample220906-a3gvtsceb7
SHA256 c056c58e3d32716447e27dbe38e784b685203dededddf1253ba4051d0a7a174a
MD5 fad8c7f1f023b519a8bc97f44c845f1b
SHA1 e305349bd0dda9732aaab10499153d6e80ce11bc
SHA512 ff1a302e99ad89f01c805517085fd76291ee594edc0e9e9c3980cd47dbf1c2429016b11df3b7621eb96da914809b2bb47e5291ec3cd2894f43ff116f9ce39fb3
SSDEEP 12288:jw/h2mDPAtjj4cv6aiUoIxbU546A9jmP/uhu/yMS08CkntxYRK:EPmjj4cZfmP/UDMS08Ckn3n
MD5 SHA1 SHA512 SSDEEP

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/0x000200000001e726-136.dat	family_kutaki
behavioral2/files/0x000200000001e726-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
2324	dpuznoch.exe

Drops startup file 2 IoCs

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

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
4200	Payment_Receipt.exe
4200	Payment_Receipt.exe
4200	Payment_Receipt.exe
2324	dpuznoch.exe
2324	dpuznoch.exe
2324	dpuznoch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4200 wrote to memory of 1340	4200	Payment_Receipt.exe	82
PID 4200 wrote to memory of 1340	4200	Payment_Receipt.exe	82
PID 4200 wrote to memory of 1340	4200	Payment_Receipt.exe	82
PID 4200 wrote to memory of 2324	4200	Payment_Receipt.exe	86
PID 4200 wrote to memory of 2324	4200	Payment_Receipt.exe	86
PID 4200 wrote to memory of 2324	4200	Payment_Receipt.exe	86

C:\Users\Admin\AppData\Local\Temp\Payment_Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\Payment_Receipt.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:1340
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dpuznoch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dpuznoch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2324

Network

MITRE ATT&CK Matrix

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Downloads

dpuznoch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dpuznoch.exe
Size 812KB
SHA256 c056c58e3d32716447e27dbe38e784b685203dededddf1253ba4051d0a7a174a
MD5 fad8c7f1f023b519a8bc97f44c845f1b
SHA1 e305349bd0dda9732aaab10499153d6e80ce11bc
SHA512 ff1a302e99ad89f01c805517085fd76291ee594edc0e9e9c3980cd47dbf1c2429016b11df3b7621eb96da914809b2bb47e5291ec3cd2894f43ff116f9ce39fb3
SSDEEP 12288:jw/h2mDPAtjj4cv6aiUoIxbU546A9jmP/uhu/yMS08CkntxYRK:EPmjj4cZfmP/UDMS08Ckn3n
MD5 SHA1 SHA512 SSDEEP

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