kutaki | fd521a6a9e13b00329723103b9039e23950450f901da8f61cea3b92ff96dceee

Analysis

max time kernel
151s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
09/11/2023, 20:02

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General

Target
Challan.exe
Size 501KB
Sample231109-ysa7asee28
SHA256 2114e284c9636a3b015aadb156369d5c55dc29541bc9f27ecf3724f16a65fa8d
MD5 816cdd0d2e0852404804a683d1cd1b53
SHA1 9842b46047c8ef18a2041a7a35fe3b51515dd829
SHA512 9648bb75a15afb57baeb7c9becf994dece54f499f04df344210c8241839d493599b71cf7ae7a9f4f790009ba3a9b8d2f80df7db41bac5b78edce20bd1a115cf2
SSDEEP 12288:6Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqTO:6Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQn
MD5 SHA1 SHA512 SSDEEP

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 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000022d69-6.dat	family_kutaki
behavioral2/files/0x0007000000022d69-5.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000\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\smiyevfk.exe	Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\smiyevfk.exe	Challan.exe

Executes dropped EXE 1 IoCs

pid	Process
3904	smiyevfk.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).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
980	mspaint.exe
980	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3260	Challan.exe
3260	Challan.exe
3260	Challan.exe
3904	smiyevfk.exe
3904	smiyevfk.exe
3904	smiyevfk.exe
980	mspaint.exe
980	mspaint.exe
980	mspaint.exe
980	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3260 wrote to memory of 3824	3260	Challan.exe	90
PID 3260 wrote to memory of 3824	3260	Challan.exe	90
PID 3260 wrote to memory of 3824	3260	Challan.exe	90
PID 3260 wrote to memory of 3904	3260	Challan.exe	92
PID 3260 wrote to memory of 3904	3260	Challan.exe	92
PID 3260 wrote to memory of 3904	3260	Challan.exe	92
PID 3824 wrote to memory of 980	3824	cmd.exe	93
PID 3824 wrote to memory of 980	3824	cmd.exe	93
PID 3824 wrote to memory of 980	3824	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Challan.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3260
- 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:3824
- - 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:980
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\smiyevfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\smiyevfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3904

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:2916

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

smiyevfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\smiyevfk.exe
Size 501KB
SHA256 2114e284c9636a3b015aadb156369d5c55dc29541bc9f27ecf3724f16a65fa8d
MD5 816cdd0d2e0852404804a683d1cd1b53
SHA1 9842b46047c8ef18a2041a7a35fe3b51515dd829
SHA512 9648bb75a15afb57baeb7c9becf994dece54f499f04df344210c8241839d493599b71cf7ae7a9f4f790009ba3a9b8d2f80df7db41bac5b78edce20bd1a115cf2
SSDEEP 12288:6Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqTO:6Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQn
MD5 SHA1 SHA512 SSDEEP

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smiyevfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\smiyevfk.exe
Size 501KB
SHA256 2114e284c9636a3b015aadb156369d5c55dc29541bc9f27ecf3724f16a65fa8d
MD5 816cdd0d2e0852404804a683d1cd1b53
SHA1 9842b46047c8ef18a2041a7a35fe3b51515dd829
SHA512 9648bb75a15afb57baeb7c9becf994dece54f499f04df344210c8241839d493599b71cf7ae7a9f4f790009ba3a9b8d2f80df7db41bac5b78edce20bd1a115cf2
SSDEEP 12288:6Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqTO:6Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQn
MD5 SHA1 SHA512 SSDEEP

Submit Download