kutaki | c1dee46173e24ff77bf3723de5285b05ecfdc6bf2abdd4d885e4195aa90d520c

Analysis

max time kernel
200s
max time network
199s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19-02-2024 04:14

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General

Target

Tax Payment Challan.exe
Size

597KB
MD5

dd1d64884898d506bf90c29890f1b4bc
SHA1

e1ea541eb0a3ab8670e77d124da4ceb4b8febc9b
SHA256

d2aab40a9073aa3f2970017b652e4d42e34ad11c5505994ba8945013aedac69e
SHA512

bf5fa648c0fe45b346a50bbb5b8fd0ff7af5aa17df3a3a37df03f6d76ebcd35b6906851e1138bd111c1010815c4f31aaaa5f00fa44f73d648e32e6592c500f99
SSDEEP

12288:TK1aFT8EUJHvXH/Xgx46A9jmP/uhu/yMS08CkntxYReaL:TBYLJvXH/wqfmP/UDMS08Ckn3o

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://linkwotowoto.club/new/two.php

Signatures

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

Kutaki Executable 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lteijufk.exe	family_kutaki

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

cmd.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

Processes:

Tax Payment Challan.exe

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

Executes dropped EXE 1 IoCs

Processes:

lteijufk.exe

pid process

1676 lteijufk.exe
Drops file in Windows directory 1 IoCs

Processes:

mspaint.exe

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log mspaint.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

cmd.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000_Classes\Local Settings cmd.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mspaint.exe

pid process

4724 mspaint.exe
4724 mspaint.exe

pid	process
1676	lteijufk.exe

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	mspaint.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000_Classes\Local Settings	cmd.exe

pid	process
4724	mspaint.exe
4724	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

Tax Payment Challan.exelteijufk.exemspaint.exe

pid	process
4168	Tax Payment Challan.exe
4168	Tax Payment Challan.exe
4168	Tax Payment Challan.exe
1676	lteijufk.exe
1676	lteijufk.exe
1676	lteijufk.exe
4724	mspaint.exe
4724	mspaint.exe
4724	mspaint.exe
4724	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Tax Payment Challan.execmd.exe

description	pid	process	target process
PID 4168 wrote to memory of 4052	4168	Tax Payment Challan.exe	cmd.exe
PID 4168 wrote to memory of 4052	4168	Tax Payment Challan.exe	cmd.exe
PID 4168 wrote to memory of 4052	4168	Tax Payment Challan.exe	cmd.exe
PID 4168 wrote to memory of 1676	4168	Tax Payment Challan.exe	lteijufk.exe
PID 4168 wrote to memory of 1676	4168	Tax Payment Challan.exe	lteijufk.exe
PID 4168 wrote to memory of 1676	4168	Tax Payment Challan.exe	lteijufk.exe
PID 4052 wrote to memory of 4724	4052	cmd.exe	mspaint.exe
PID 4052 wrote to memory of 4724	4052	cmd.exe	mspaint.exe
PID 4052 wrote to memory of 4724	4052	cmd.exe	mspaint.exe

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  - Checks computer location settings
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4052
- - C:\Windows\SysWOW64\mspaint.exe
    "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp"
    3⤵
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:4724
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lteijufk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lteijufk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1676

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:3780

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
597KB

MD5
dd1d64884898d506bf90c29890f1b4bc

SHA1
e1ea541eb0a3ab8670e77d124da4ceb4b8febc9b

SHA256
d2aab40a9073aa3f2970017b652e4d42e34ad11c5505994ba8945013aedac69e

SHA512
bf5fa648c0fe45b346a50bbb5b8fd0ff7af5aa17df3a3a37df03f6d76ebcd35b6906851e1138bd111c1010815c4f31aaaa5f00fa44f73d648e32e6592c500f99

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