kutaki | a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659

Analysis

max time kernel
4294183s
max time network
127s
platform
windows7_x64
resource
win7-20220311-en
submitted
29/03/2022, 20:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
Size

884KB
MD5

5d481b1a50c3d6477180f413f1b5597c
SHA1

3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca
SHA256

a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659
SHA512

d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

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 3 IoCs

resource	yara_rule
behavioral1/files/0x00090000000122fd-58.dat	family_kutaki
behavioral1/files/0x00090000000122fd-61.dat	family_kutaki
behavioral1/files/0x00090000000122fd-59.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1732	fbzxyrch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe

Loads dropped DLL 2 IoCs

pid	Process
1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.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 SetWindowsHookEx 64 IoCs

pid	Process
1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe
1732	fbzxyrch.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 300	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	28
PID 1968 wrote to memory of 300	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	28
PID 1968 wrote to memory of 300	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	28
PID 1968 wrote to memory of 300	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	28
PID 1968 wrote to memory of 1732	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	30
PID 1968 wrote to memory of 1732	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	30
PID 1968 wrote to memory of 1732	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	30
PID 1968 wrote to memory of 1732	1968	a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe	30

C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe
"C:\Users\Admin\AppData\Local\Temp\a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:300
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fbzxyrch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1732

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
884KB

MD5
5d481b1a50c3d6477180f413f1b5597c

SHA1
3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca

SHA256
a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659

SHA512
d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

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

Filesize
884KB

MD5
5d481b1a50c3d6477180f413f1b5597c

SHA1
3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca

SHA256
a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659

SHA512
d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

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

Filesize
884KB

MD5
5d481b1a50c3d6477180f413f1b5597c

SHA1
3cb1c4f6622fbd6b591fd3f50fa18664c6d9d0ca

SHA256
a8a690b159d9ee37b5ef2a16800385d61581a8e4d21f0069cd492e919a868659

SHA512
d0ec083a97be0ce6fa33cf6dd3e424e1f939fded0dbaebed0f66c7871071cfc355c8da117726fd9328537595b6ca641f4dc7419baf7f105cf018a3deed5f1f0c

Download Submit
memory/1968-56-0x00000000767A1000-0x00000000767A3000-memory.dmp

Filesize
8KB

Download