kutaki | 793b8eebc54d69cd4e7e80400d55bc97dda0ff3836c39eec8c67a00285bdd722

Analysis

max time kernel
140s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/09/2022, 07:09

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General

Target

HDFC Tax Payment Attached.exe
Size

408KB
MD5

f2d9b19707c3356037cb197852fe938d
SHA1

44e2604986ee12516c7a53226885eb062e70fb19
SHA256

793b8eebc54d69cd4e7e80400d55bc97dda0ff3836c39eec8c67a00285bdd722
SHA512

1a9de6ca3b77396792dc3914dcef44f00dec10ed2d51bcb7721c61756a290260523017de20a257a1e09969155208471967f5e2bd4ef34940b71d2f1e87709db0
SSDEEP

6144:Bx9Xwhm7c/n10V7c5W4Es+CS/wUcvzUjSa5pK2mKdl0TruunfD09gfJChgGJhCj:BbXwhm7a1NB4/8vYjDpK8atfx8hDu

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://newbosslink.xyz/baba/new4.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/0x000a000000022e1c-137.dat	family_kutaki
behavioral2/files/0x000a000000022e1c-138.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
2624	ch.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\ch.exe	HDFC Tax Payment Attached.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	HDFC Tax Payment Attached.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
2976	mspaint.exe
2976	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3208	HDFC Tax Payment Attached.exe
3208	HDFC Tax Payment Attached.exe
3208	HDFC Tax Payment Attached.exe
2976	mspaint.exe
2976	mspaint.exe
2976	mspaint.exe
2976	mspaint.exe
2624	ch.exe
2624	ch.exe
2624	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3208 wrote to memory of 4808	3208	HDFC Tax Payment Attached.exe	83
PID 3208 wrote to memory of 4808	3208	HDFC Tax Payment Attached.exe	83
PID 3208 wrote to memory of 4808	3208	HDFC Tax Payment Attached.exe	83
PID 4808 wrote to memory of 2976	4808	cmd.exe	85
PID 4808 wrote to memory of 2976	4808	cmd.exe	85
PID 4808 wrote to memory of 2976	4808	cmd.exe	85
PID 3208 wrote to memory of 2624	3208	HDFC Tax Payment Attached.exe	90
PID 3208 wrote to memory of 2624	3208	HDFC Tax Payment Attached.exe	90
PID 3208 wrote to memory of 2624	3208	HDFC Tax Payment Attached.exe	90

C:\Users\Admin\AppData\Local\Temp\HDFC Tax Payment Attached.exe
"C:\Users\Admin\AppData\Local\Temp\HDFC Tax Payment Attached.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3208
- 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:4808
- - 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:2976
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2624

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:692

Network

MITRE ATT&CK Enterprise v6

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

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

Filesize
408KB

MD5
f2d9b19707c3356037cb197852fe938d

SHA1
44e2604986ee12516c7a53226885eb062e70fb19

SHA256
793b8eebc54d69cd4e7e80400d55bc97dda0ff3836c39eec8c67a00285bdd722

SHA512
1a9de6ca3b77396792dc3914dcef44f00dec10ed2d51bcb7721c61756a290260523017de20a257a1e09969155208471967f5e2bd4ef34940b71d2f1e87709db0

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

Filesize
408KB

MD5
f2d9b19707c3356037cb197852fe938d

SHA1
44e2604986ee12516c7a53226885eb062e70fb19

SHA256
793b8eebc54d69cd4e7e80400d55bc97dda0ff3836c39eec8c67a00285bdd722

SHA512
1a9de6ca3b77396792dc3914dcef44f00dec10ed2d51bcb7721c61756a290260523017de20a257a1e09969155208471967f5e2bd4ef34940b71d2f1e87709db0

Download Submit