kutaki | 4e95c654625af3c239740b6d8f1799d5ad938bcb9404d2935c5240c22985d76b

Analysis

max time kernel
156s
max time network
152s
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, 09:16

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General

Target
Payment Channel.exe
Size 501KB
Sample231109-k8fvtsaa35
SHA256 b8e4bcb3699104e49979cc86b84ce278bd6b9b392d65d465ac1acd7808ed0db0
MD5 646849ab728ff631b3c70480638e6a2a
SHA1 8f9f70ef43add2a45e0a2430b2d9680616faef8b
SHA512 32f0a0949c33e0b34239581bbb86d3ee42acdaddc9856c78a55b88924dcade166663e2c8345040dbc2f383b74ebda88e952d9091643d8a7ea8e5d1fd82002de3
SSDEEP 12288:7Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqT1:7Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQM
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/0x0006000000022e35-5.dat	family_kutaki
behavioral2/files/0x0006000000022e35-6.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-1-5-21-3350690463-3549324357-1323838019-1000\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\fpbbivfk.exe	Payment Channel.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fpbbivfk.exe	Payment Channel.exe

Executes dropped EXE 1 IoCs

pid	Process
4064	fpbbivfk.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-1-5-21-3350690463-3549324357-1323838019-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2384	mspaint.exe
2384	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
5116	Payment Channel.exe
5116	Payment Channel.exe
5116	Payment Channel.exe
4064	fpbbivfk.exe
4064	fpbbivfk.exe
4064	fpbbivfk.exe
2384	mspaint.exe
2384	mspaint.exe
2384	mspaint.exe
2384	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 364	5116	Payment Channel.exe	90
PID 5116 wrote to memory of 364	5116	Payment Channel.exe	90
PID 5116 wrote to memory of 364	5116	Payment Channel.exe	90
PID 5116 wrote to memory of 4064	5116	Payment Channel.exe	91
PID 5116 wrote to memory of 4064	5116	Payment Channel.exe	91
PID 5116 wrote to memory of 4064	5116	Payment Channel.exe	91
PID 364 wrote to memory of 2384	364	cmd.exe	93
PID 364 wrote to memory of 2384	364	cmd.exe	93
PID 364 wrote to memory of 2384	364	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\Payment Channel.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Channel.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5116
- 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:364
- - 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:2384
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fpbbivfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fpbbivfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4064

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4188

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

fpbbivfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fpbbivfk.exe
Size 501KB
SHA256 b8e4bcb3699104e49979cc86b84ce278bd6b9b392d65d465ac1acd7808ed0db0
MD5 646849ab728ff631b3c70480638e6a2a
SHA1 8f9f70ef43add2a45e0a2430b2d9680616faef8b
SHA512 32f0a0949c33e0b34239581bbb86d3ee42acdaddc9856c78a55b88924dcade166663e2c8345040dbc2f383b74ebda88e952d9091643d8a7ea8e5d1fd82002de3
SSDEEP 12288:7Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqT1:7Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQM
MD5 SHA1 SHA512 SSDEEP

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fpbbivfk.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fpbbivfk.exe
Size 501KB
SHA256 b8e4bcb3699104e49979cc86b84ce278bd6b9b392d65d465ac1acd7808ed0db0
MD5 646849ab728ff631b3c70480638e6a2a
SHA1 8f9f70ef43add2a45e0a2430b2d9680616faef8b
SHA512 32f0a0949c33e0b34239581bbb86d3ee42acdaddc9856c78a55b88924dcade166663e2c8345040dbc2f383b74ebda88e952d9091643d8a7ea8e5d1fd82002de3
SSDEEP 12288:7Ycs+XKy/AZe+e9AP8LP810o4HfyNQlQj0DunOq0Mte9oIopkyd+wMeMIC10pqT1:7Ycs+XKy/AZeJ9AP8LP810o4HfyNQlQM
MD5 SHA1 SHA512 SSDEEP

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