kutaki | af0d6784c97c27046e8801283e7fba16592683f780ae03d8971ae67eeeae8f02

Analysis

max time kernel
161s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
04/12/2022, 13:55

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General

Target

Tax Payment Challan.exe
Size

603KB
MD5

1299315c3032491208ef04f8674aa5fa
SHA1

f320997f6f3479ef392be9f35e1f5b600f9f42f1
SHA256

11724aa717338d3fa58fc1c6d92cdf9b64ca986b0e2f6cde1a5d795d6277fc4c
SHA512

41025d5293d43d630c932d1b186c75c793cf9430222a90e02c719c2b5a436715c3298626ef1c1567f92a42e468f8abb5c053e44c38d339b1e75c5b329ed8474a
SSDEEP

6144:BHmz3+U3iFSMYN5Exf2o9LnIH8iN/wfGB4Dosj1E+6VVPviDlSOcwhxAwOhgYwj7:9rtZmXN4zJpGPqlSpwhm4s5bsGSCs5

Score

10^/10

kutaki keylogger stealer

Malware Config

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/0x000400000001da4c-137.dat	family_kutaki
behavioral2/files/0x000400000001da4c-138.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
812	lunlerio.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-1-5-21-2629973501-4017243118-3254762364-1000\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\lunlerio.exe	Tax Payment Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe	Tax Payment Challan.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	lunlerio.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	lunlerio.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-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4772	mspaint.exe
4772	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4540	Tax Payment Challan.exe
4540	Tax Payment Challan.exe
4540	Tax Payment Challan.exe
4772	mspaint.exe
4772	mspaint.exe
4772	mspaint.exe
4772	mspaint.exe
812	lunlerio.exe
812	lunlerio.exe
812	lunlerio.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 2728	4540	Tax Payment Challan.exe	80
PID 4540 wrote to memory of 2728	4540	Tax Payment Challan.exe	80
PID 4540 wrote to memory of 2728	4540	Tax Payment Challan.exe	80
PID 2728 wrote to memory of 4772	2728	cmd.exe	82
PID 2728 wrote to memory of 4772	2728	cmd.exe	82
PID 2728 wrote to memory of 4772	2728	cmd.exe	82
PID 4540 wrote to memory of 812	4540	Tax Payment Challan.exe	86
PID 4540 wrote to memory of 812	4540	Tax Payment Challan.exe	86
PID 4540 wrote to memory of 812	4540	Tax Payment Challan.exe	86

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:4540
- 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:2728
- - 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:4772
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lunlerio.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:812

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4084

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
603KB

MD5
1299315c3032491208ef04f8674aa5fa

SHA1
f320997f6f3479ef392be9f35e1f5b600f9f42f1

SHA256
11724aa717338d3fa58fc1c6d92cdf9b64ca986b0e2f6cde1a5d795d6277fc4c

SHA512
41025d5293d43d630c932d1b186c75c793cf9430222a90e02c719c2b5a436715c3298626ef1c1567f92a42e468f8abb5c053e44c38d339b1e75c5b329ed8474a

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

Filesize
603KB

MD5
1299315c3032491208ef04f8674aa5fa

SHA1
f320997f6f3479ef392be9f35e1f5b600f9f42f1

SHA256
11724aa717338d3fa58fc1c6d92cdf9b64ca986b0e2f6cde1a5d795d6277fc4c

SHA512
41025d5293d43d630c932d1b186c75c793cf9430222a90e02c719c2b5a436715c3298626ef1c1567f92a42e468f8abb5c053e44c38d339b1e75c5b329ed8474a

Download Submit