kutaki | 4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

Analysis

max time kernel
125s
max time network
61s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
22/07/2022, 04:53

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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 2 IoCs

resource	yara_rule
behavioral2/files/0x000a000000022eb4-135.dat	family_kutaki
behavioral2/files/0x000a000000022eb4-136.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4328	ch.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-1-5-21-2372564722-193526734-2636556182-1000\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\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

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-1-5-21-2372564722-193526734-2636556182-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
376	mspaint.exe
376	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3148	Tax Payment Challan.exe
3148	Tax Payment Challan.exe
3148	Tax Payment Challan.exe
376	mspaint.exe
4328	ch.exe
376	mspaint.exe
376	mspaint.exe
376	mspaint.exe
4328	ch.exe
4328	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3148 wrote to memory of 3428	3148	Tax Payment Challan.exe	78
PID 3148 wrote to memory of 3428	3148	Tax Payment Challan.exe	78
PID 3148 wrote to memory of 3428	3148	Tax Payment Challan.exe	78
PID 3428 wrote to memory of 376	3428	cmd.exe	80
PID 3428 wrote to memory of 376	3428	cmd.exe	80
PID 3428 wrote to memory of 376	3428	cmd.exe	80
PID 3148 wrote to memory of 4328	3148	Tax Payment Challan.exe	82
PID 3148 wrote to memory of 4328	3148	Tax Payment Challan.exe	82
PID 3148 wrote to memory of 4328	3148	Tax Payment Challan.exe	82

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:3148
- 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:3428
- - 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:376
- 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:4328

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4360

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

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

Filesize
768KB

MD5
d25f259e5943e02244d5a6fb3cc9b778

SHA1
ae4c93a5264acdf26a11cd9165f7382afceedb50

SHA256
4b0f2eb3c83c7a8f9bf0f945feeadad30cb7e5432f6c66fe7d6b921925ce142a

SHA512
8363351c576a8be88a02408ebcfc60a6c5abc0db402cd12b349c80b787bb3fd9bc2ab6206c3a7293ff187b61d0da2cdf6100020836c8a590a2181689c72fd019

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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