kutaki | ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5

Analysis

max time kernel
158s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
13/01/2023, 15:00

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General

Target
Payment Confirmation.exe
Size 621KB
Sample230113-sdchxsde2t
SHA256 ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5
MD5 7558689ffc3f6a0da8e35d8f257c86bb
SHA1 40b520982a8e9e79c39eec75d3b62d685b8946e5
SHA512 acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401
SSDEEP 12288:/GDq0pDRbx37mEZBVlUvE46A9jmP/uhu/yMS08CkntxYRXL:/GDq05R1rmEZBQfmP/UDMS08Ckn3y
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://newbosslink.xyz/baba/new4.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/0x0006000000022e37-136.dat	family_kutaki
behavioral2/files/0x0006000000022e37-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4496	tgfljtfk.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

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

Drops file in Windows directory 1 IoCs

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). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2576	mspaint.exe
2576	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4800	Payment Confirmation.exe
4800	Payment Confirmation.exe
4800	Payment Confirmation.exe
4496	tgfljtfk.exe
4496	tgfljtfk.exe
4496	tgfljtfk.exe
2576	mspaint.exe
2576	mspaint.exe
2576	mspaint.exe
2576	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 4320	4800	Payment Confirmation.exe	82
PID 4800 wrote to memory of 4320	4800	Payment Confirmation.exe	82
PID 4800 wrote to memory of 4320	4800	Payment Confirmation.exe	82
PID 4800 wrote to memory of 4496	4800	Payment Confirmation.exe	84
PID 4800 wrote to memory of 4496	4800	Payment Confirmation.exe	84
PID 4800 wrote to memory of 4496	4800	Payment Confirmation.exe	84
PID 4320 wrote to memory of 2576	4320	cmd.exe	85
PID 4320 wrote to memory of 2576	4320	cmd.exe	85
PID 4320 wrote to memory of 2576	4320	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4800
- 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:4320
- - 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:2576
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tgfljtfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tgfljtfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4496

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4636

Network

MITRE ATT&CK Enterprise v6

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

tgfljtfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tgfljtfk.exe
Size 621KB
SHA256 ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5
MD5 7558689ffc3f6a0da8e35d8f257c86bb
SHA1 40b520982a8e9e79c39eec75d3b62d685b8946e5
SHA512 acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401
SSDEEP 12288:/GDq0pDRbx37mEZBVlUvE46A9jmP/uhu/yMS08CkntxYRXL:/GDq05R1rmEZBQfmP/UDMS08Ckn3y
MD5 SHA1 SHA512 SSDEEP

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tgfljtfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tgfljtfk.exe
Size 621KB
SHA256 ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5
MD5 7558689ffc3f6a0da8e35d8f257c86bb
SHA1 40b520982a8e9e79c39eec75d3b62d685b8946e5
SHA512 acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401
SSDEEP 12288:/GDq0pDRbx37mEZBVlUvE46A9jmP/uhu/yMS08CkntxYRXL:/GDq05R1rmEZBQfmP/UDMS08Ckn3y
MD5 SHA1 SHA512 SSDEEP

Submit Download