kutaki | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

Analysis

max time kernel
113s
max time network
45s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
22/07/2022, 04:53

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Tax Payment Challan.exe
Size

768KB
MD5

d25f259e5943e02244d5a6fb3cc9b778
SHA1

ae4c93a5264acdf26a11cd9165f7382afceedb50
SHA256

4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a
SHA512

8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://newloshree.xyz/work/kenny3.php

Signatures

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

Kutaki Executable 3 IoCs

resource	yara_rule
behavioral1/files/0x000a0000000122ed-58.dat	family_kutaki
behavioral1/files/0x000a0000000122ed-60.dat	family_kutaki
behavioral1/files/0x000a0000000122ed-62.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1652	ch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	Tax Payment Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	Tax Payment Challan.exe

Loads dropped DLL 2 IoCs

pid	Process
1668	Tax Payment Challan.exe
1668	Tax Payment Challan.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1016	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
1668	Tax Payment Challan.exe
1668	Tax Payment Challan.exe
1668	Tax Payment Challan.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe
1652	ch.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 1240	1668	Tax Payment Challan.exe	29
PID 1668 wrote to memory of 1240	1668	Tax Payment Challan.exe	29
PID 1668 wrote to memory of 1240	1668	Tax Payment Challan.exe	29
PID 1668 wrote to memory of 1240	1668	Tax Payment Challan.exe	29
PID 1668 wrote to memory of 1652	1668	Tax Payment Challan.exe	31
PID 1668 wrote to memory of 1652	1668	Tax Payment Challan.exe	31
PID 1668 wrote to memory of 1652	1668	Tax Payment Challan.exe	31
PID 1668 wrote to memory of 1652	1668	Tax Payment Challan.exe	31

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1240
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1652

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe

Filesize
768KB

MD5
d25f259e5943e02244d5a6fb3cc9b778

SHA1
ae4c93a5264acdf26a11cd9165f7382afceedb50

SHA256
4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

SHA512
8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe

Filesize
768KB

MD5
d25f259e5943e02244d5a6fb3cc9b778

SHA1
ae4c93a5264acdf26a11cd9165f7382afceedb50

SHA256
4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

SHA512
8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe

Filesize
768KB

MD5
d25f259e5943e02244d5a6fb3cc9b778

SHA1
ae4c93a5264acdf26a11cd9165f7382afceedb50

SHA256
4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

SHA512
8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

Download Submit
memory/1652-66-0x00000000028D0000-0x000000000338A000-memory.dmp

Filesize
10.7MB

Download
memory/1668-56-0x0000000075B61000-0x0000000075B63000-memory.dmp

Filesize
8KB

Download