kutaki | 2be2263de3ddb86a18bc0adb5a00c85a1cea207ea41cdb770a12b29336a115ea

Analysis

max time kernel
104s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
20/09/2022, 09:58

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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 3 IoCs

resource	yara_rule
behavioral1/files/0x00090000000122eb-59.dat	family_kutaki
behavioral1/files/0x00090000000122eb-58.dat	family_kutaki
behavioral1/files/0x00090000000122eb-62.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
856	ch.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

Loads dropped DLL 2 IoCs

pid	Process
1972	HDFC Tax Payment Confirmation.exe
1972	HDFC Tax Payment Confirmation.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2028	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
1972	HDFC Tax Payment Confirmation.exe
1972	HDFC Tax Payment Confirmation.exe
1972	HDFC Tax Payment Confirmation.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe
856	ch.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1360	1972	HDFC Tax Payment Confirmation.exe	29
PID 1972 wrote to memory of 1360	1972	HDFC Tax Payment Confirmation.exe	29
PID 1972 wrote to memory of 1360	1972	HDFC Tax Payment Confirmation.exe	29
PID 1972 wrote to memory of 1360	1972	HDFC Tax Payment Confirmation.exe	29
PID 1972 wrote to memory of 856	1972	HDFC Tax Payment Confirmation.exe	31
PID 1972 wrote to memory of 856	1972	HDFC Tax Payment Confirmation.exe	31
PID 1972 wrote to memory of 856	1972	HDFC Tax Payment Confirmation.exe	31
PID 1972 wrote to memory of 856	1972	HDFC Tax Payment Confirmation.exe	31

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
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1360
- 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:856

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
544KB

MD5
4d99bb4a8d588039573908a4cb9c1f5d

SHA1
15feba0a4ad53bdb7135fd58de01dee088301646

SHA256
b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6

SHA512
1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda

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

Filesize
544KB

MD5
4d99bb4a8d588039573908a4cb9c1f5d

SHA1
15feba0a4ad53bdb7135fd58de01dee088301646

SHA256
b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6

SHA512
1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda

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

Filesize
544KB

MD5
4d99bb4a8d588039573908a4cb9c1f5d

SHA1
15feba0a4ad53bdb7135fd58de01dee088301646

SHA256
b515657198d14112d9fd991fc5147cb8ca68050bf948669548e4d7998f76e9b6

SHA512
1884646b44413a603c8ca2ce186d04e32456c693676e1949f38bcae21732c0428aeef412ac6202a199f7ab4a48c2cbde923ae4ea9917fb289aa9aee1b8ea9cda

Download Submit
memory/1972-56-0x0000000075501000-0x0000000075503000-memory.dmp

Filesize
8KB

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