kutaki | 2be2263de3ddb86a18bc0adb5a00c85a1cea207ea41cdb770a12b29336a115ea

Analysis

max time kernel
137s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20/09/2022, 09:58

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

HDFC Tax Payment Confirmation.exe
Size

544KB
MD5

4d99bb4a8d588039573908a4cb9c1f5d
SHA1

15feba0a4ad53bdb7135fd58de01dee088301646
SHA256

b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6
SHA512

1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda
SSDEEP

6144:M8ylUOltoMFD95ad/gvlfZPFHrbl3wL0n9/G0GM5JLMKRMWBXd+tPdvcW4Es+CSE:j2YcJmW/+bcB4/8vYjDpK8atfx8hDu

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/0x0008000000009db3-137.dat	family_kutaki
behavioral2/files/0x0008000000009db3-138.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
432	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-1-5-21-2295526160-1155304984-640977766-1000\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 Confirmation.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	HDFC Tax Payment Confirmation.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-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2144	mspaint.exe
2144	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
376	HDFC Tax Payment Confirmation.exe
376	HDFC Tax Payment Confirmation.exe
376	HDFC Tax Payment Confirmation.exe
2144	mspaint.exe
2144	mspaint.exe
2144	mspaint.exe
2144	mspaint.exe
432	ch.exe
432	ch.exe
432	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 4824	376	HDFC Tax Payment Confirmation.exe	79
PID 376 wrote to memory of 4824	376	HDFC Tax Payment Confirmation.exe	79
PID 376 wrote to memory of 4824	376	HDFC Tax Payment Confirmation.exe	79
PID 4824 wrote to memory of 2144	4824	cmd.exe	81
PID 4824 wrote to memory of 2144	4824	cmd.exe	81
PID 4824 wrote to memory of 2144	4824	cmd.exe	81
PID 376 wrote to memory of 432	376	HDFC Tax Payment Confirmation.exe	87
PID 376 wrote to memory of 432	376	HDFC Tax Payment Confirmation.exe	87
PID 376 wrote to memory of 432	376	HDFC Tax Payment Confirmation.exe	87

C:\Users\Admin\AppData\Local\Temp\HDFC Tax Payment Confirmation.exe
"C:\Users\Admin\AppData\Local\Temp\HDFC Tax Payment Confirmation.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:376
- 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:4824
- - 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:2144
- 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:432

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:1716

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
544KB

MD5
4d99bb4a8d588039573908a4cb9c1f5d

SHA1
15feba0a4ad53bdb7135fd58de01dee088301646

SHA256
b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6

SHA512
1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda

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

Filesize
544KB

MD5
4d99bb4a8d588039573908a4cb9c1f5d

SHA1
15feba0a4ad53bdb7135fd58de01dee088301646

SHA256
b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6

SHA512
1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda

Download Submit