kutaki | 6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f

Analysis

max time kernel
151s
max time network
156s
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 11:34

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General

Target

Challan.exe
Size

573KB
MD5

111d37dd39bb7f73b76eb13e22a16178
SHA1

c358557e24b87ae758606d707763bfa95da88a61
SHA256

6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f
SHA512

31b0424ce110261af02c23c94a60659301ba6eacc4223578b04fe1fc815f4eb41f7d899f6322e642a6df62e88580a4d70131a01500ebe12b9ffa46d9e7232bf4
SSDEEP

12288:Ua4NFT8ElW46A9jmP/uhu/yMS08CkntxYRtqL:J6YahfmP/UDMS08Ckn3v

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\txlgjefk.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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

Processes:

Challan.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\txlgjefk.exe	Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\txlgjefk.exe	Challan.exe

Executes dropped EXE 1 IoCs

Processes:

txlgjefk.exe

pid process

376 txlgjefk.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-1-5-21-3844919115-497234255-166257750-1000_Classes\Local Settings cmd.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mspaint.exe

pid process

5116 mspaint.exe
5116 mspaint.exe

pid	process
376	txlgjefk.exe

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

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000_Classes\Local Settings	cmd.exe

pid	process
5116	mspaint.exe
5116	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

Challan.exetxlgjefk.exemspaint.exe

pid	process
2144	Challan.exe
2144	Challan.exe
2144	Challan.exe
376	txlgjefk.exe
376	txlgjefk.exe
376	txlgjefk.exe
5116	mspaint.exe
5116	mspaint.exe
5116	mspaint.exe
5116	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Challan.execmd.exe

description	pid	process	target process
PID 2144 wrote to memory of 3856	2144	Challan.exe	cmd.exe
PID 2144 wrote to memory of 3856	2144	Challan.exe	cmd.exe
PID 2144 wrote to memory of 3856	2144	Challan.exe	cmd.exe
PID 2144 wrote to memory of 376	2144	Challan.exe	txlgjefk.exe
PID 2144 wrote to memory of 376	2144	Challan.exe	txlgjefk.exe
PID 2144 wrote to memory of 376	2144	Challan.exe	txlgjefk.exe
PID 3856 wrote to memory of 5116	3856	cmd.exe	mspaint.exe
PID 3856 wrote to memory of 5116	3856	cmd.exe	mspaint.exe
PID 3856 wrote to memory of 5116	3856	cmd.exe	mspaint.exe

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:2144

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:3856

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:5116

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\txlgjefk.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\txlgjefk.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:376

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:836

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\txlgjefk.exe
Filesize
573KB

MD5
111d37dd39bb7f73b76eb13e22a16178

SHA1
c358557e24b87ae758606d707763bfa95da88a61

SHA256
6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f

SHA512
31b0424ce110261af02c23c94a60659301ba6eacc4223578b04fe1fc815f4eb41f7d899f6322e642a6df62e88580a4d70131a01500ebe12b9ffa46d9e7232bf4

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