kutaki | e4adf875355662338b487d33f7235b3987f2d5c06c8c6772a374a8d65e353ee0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
26-02-2024 15:59

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General

Target

Tax Payment Challan.exe
Size

617KB
MD5

9b719e21e56dfe22fe282fcd496d83c6
SHA1

f0229d661757258893ca0f0b9daf21ac52d71364
SHA256

314354ecd6851e77c74ab85bba3a53c9f2ee6c95010410f8ef3c5c435600ecb2
SHA512

c969de50ba51747e457aed23a2f60a131e055d217c8e941ea03e0f51a2f441d4dc4f105ae78418f7be9bec326f7949ebabe174e9c50226c6ef8c59c57418750e
SSDEEP

12288:eFT8EyAFXYN1hP46A9jmP/uhu/yMS08CkntxYRmqL:uYlAFXqAfmP/UDMS08Ckn3A

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\jsaekxfk.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-1-5-21-2828415587-3732861812-1919322417-1000\Control Panel\International\Geo\Nation cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2828415587-3732861812-1919322417-1000\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\jsaekxfk.exe	Tax Payment Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jsaekxfk.exe	Tax Payment Challan.exe

Executes dropped EXE 1 IoCs

Processes:

jsaekxfk.exe

pid process

2316 jsaekxfk.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-1-5-21-2828415587-3732861812-1919322417-1000_Classes\Local Settings cmd.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mspaint.exe

pid process

4196 mspaint.exe
4196 mspaint.exe

pid	process
2316	jsaekxfk.exe

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

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2828415587-3732861812-1919322417-1000_Classes\Local Settings	cmd.exe

pid	process
4196	mspaint.exe
4196	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

Tax Payment Challan.exejsaekxfk.exemspaint.exe

pid	process
368	Tax Payment Challan.exe
368	Tax Payment Challan.exe
368	Tax Payment Challan.exe
2316	jsaekxfk.exe
2316	jsaekxfk.exe
2316	jsaekxfk.exe
4196	mspaint.exe
4196	mspaint.exe
4196	mspaint.exe
4196	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Tax Payment Challan.execmd.exe

description	pid	process	target process
PID 368 wrote to memory of 884	368	Tax Payment Challan.exe	cmd.exe
PID 368 wrote to memory of 884	368	Tax Payment Challan.exe	cmd.exe
PID 368 wrote to memory of 884	368	Tax Payment Challan.exe	cmd.exe
PID 368 wrote to memory of 2316	368	Tax Payment Challan.exe	jsaekxfk.exe
PID 368 wrote to memory of 2316	368	Tax Payment Challan.exe	jsaekxfk.exe
PID 368 wrote to memory of 2316	368	Tax Payment Challan.exe	jsaekxfk.exe
PID 884 wrote to memory of 4196	884	cmd.exe	mspaint.exe
PID 884 wrote to memory of 4196	884	cmd.exe	mspaint.exe
PID 884 wrote to memory of 4196	884	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:368

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:884

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:4196

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jsaekxfk.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jsaekxfk.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:2316

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:2616

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\jsaekxfk.exe
Filesize
617KB

MD5
9b719e21e56dfe22fe282fcd496d83c6

SHA1
f0229d661757258893ca0f0b9daf21ac52d71364

SHA256
314354ecd6851e77c74ab85bba3a53c9f2ee6c95010410f8ef3c5c435600ecb2

SHA512
c969de50ba51747e457aed23a2f60a131e055d217c8e941ea03e0f51a2f441d4dc4f105ae78418f7be9bec326f7949ebabe174e9c50226c6ef8c59c57418750e

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