kutaki | 551139fbf090ebe790659819d4dce1b9f9294ccf547a86e672ba1b7477c07ad1

Analysis

max time kernel
124s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/09/2022, 11:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Payment Confirmation Invoice.exe
Size

408KB
MD5

226bea0278f6534c83992d1ceac1c211
SHA1

b1a3df7bedbb45b0a2df9e575293d795996da01a
SHA256

29b194f5409b24a2bdf4b74f35e13a73e7e133dab36339f7b2cc9a0e4f007e17
SHA512

e889315f6609ace41811e0f7379cccb802b0ed3012337f9653241b3a0bdaf9b9bf523b9134b2e373d9117118fef68565c1a5e7eb57ddb53c2656277f2957277e
SSDEEP

6144:ax9Xwhm7c/n10V7cMW4Es+CS/wUcvzUjSa5pK2mKdl0TruunfD09gfJChgGJhCj:abXwhm7a1gB4/8vYjDpK8atfx8hDu

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/0x000400000001d9f7-137.dat	family_kutaki
behavioral2/files/0x000400000001d9f7-138.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
808	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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	Payment Confirmation Invoice.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	Payment Confirmation Invoice.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-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4724	mspaint.exe
4724	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2072	Payment Confirmation Invoice.exe
2072	Payment Confirmation Invoice.exe
2072	Payment Confirmation Invoice.exe
4724	mspaint.exe
4724	mspaint.exe
808	ch.exe
4724	mspaint.exe
4724	mspaint.exe
808	ch.exe
808	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 540	2072	Payment Confirmation Invoice.exe	83
PID 2072 wrote to memory of 540	2072	Payment Confirmation Invoice.exe	83
PID 2072 wrote to memory of 540	2072	Payment Confirmation Invoice.exe	83
PID 540 wrote to memory of 4724	540	cmd.exe	84
PID 540 wrote to memory of 4724	540	cmd.exe	84
PID 540 wrote to memory of 4724	540	cmd.exe	84
PID 2072 wrote to memory of 808	2072	Payment Confirmation Invoice.exe	89
PID 2072 wrote to memory of 808	2072	Payment Confirmation Invoice.exe	89
PID 2072 wrote to memory of 808	2072	Payment Confirmation Invoice.exe	89

C:\Users\Admin\AppData\Local\Temp\Payment Confirmation Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Confirmation Invoice.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2072
- 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:540
- - 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\ch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:808

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4924

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
408KB

MD5
226bea0278f6534c83992d1ceac1c211

SHA1
b1a3df7bedbb45b0a2df9e575293d795996da01a

SHA256
29b194f5409b24a2bdf4b74f35e13a73e7e133dab36339f7b2cc9a0e4f007e17

SHA512
e889315f6609ace41811e0f7379cccb802b0ed3012337f9653241b3a0bdaf9b9bf523b9134b2e373d9117118fef68565c1a5e7eb57ddb53c2656277f2957277e

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

Filesize
408KB

MD5
226bea0278f6534c83992d1ceac1c211

SHA1
b1a3df7bedbb45b0a2df9e575293d795996da01a

SHA256
29b194f5409b24a2bdf4b74f35e13a73e7e133dab36339f7b2cc9a0e4f007e17

SHA512
e889315f6609ace41811e0f7379cccb802b0ed3012337f9653241b3a0bdaf9b9bf523b9134b2e373d9117118fef68565c1a5e7eb57ddb53c2656277f2957277e

Download Submit