kutaki | ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5

Analysis

max time kernel
96s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
13/01/2023, 15:00

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General

Target

Payment Confirmation.exe
Size

621KB
MD5

7558689ffc3f6a0da8e35d8f257c86bb
SHA1

40b520982a8e9e79c39eec75d3b62d685b8946e5
SHA256

ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5
SHA512

acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401
SSDEEP

12288:/GDq0pDRbx37mEZBVlUvE46A9jmP/uhu/yMS08CkntxYRXL:/GDq05R1rmEZBQfmP/UDMS08Ckn3y

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/0x000900000001267d-62.dat	family_kutaki
behavioral1/files/0x000900000001267d-59.dat	family_kutaki
behavioral1/files/0x000900000001267d-58.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
592	fvsdjmfk.exe

Drops startup file 2 IoCs

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

Loads dropped DLL 2 IoCs

pid	Process
1748	Payment Confirmation.exe
1748	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
1284	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
1748	Payment Confirmation.exe
1748	Payment Confirmation.exe
1748	Payment Confirmation.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe
592	fvsdjmfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 1528	1748	Payment Confirmation.exe	29
PID 1748 wrote to memory of 1528	1748	Payment Confirmation.exe	29
PID 1748 wrote to memory of 1528	1748	Payment Confirmation.exe	29
PID 1748 wrote to memory of 1528	1748	Payment Confirmation.exe	29
PID 1748 wrote to memory of 592	1748	Payment Confirmation.exe	31
PID 1748 wrote to memory of 592	1748	Payment Confirmation.exe	31
PID 1748 wrote to memory of 592	1748	Payment Confirmation.exe	31
PID 1748 wrote to memory of 592	1748	Payment Confirmation.exe	31

C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1528
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fvsdjmfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fvsdjmfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:592

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1284

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\fvsdjmfk.exe

Filesize
621KB

MD5
7558689ffc3f6a0da8e35d8f257c86bb

SHA1
40b520982a8e9e79c39eec75d3b62d685b8946e5

SHA256
ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5

SHA512
acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401

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

Filesize
621KB

MD5
7558689ffc3f6a0da8e35d8f257c86bb

SHA1
40b520982a8e9e79c39eec75d3b62d685b8946e5

SHA256
ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5

SHA512
acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401

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

Filesize
621KB

MD5
7558689ffc3f6a0da8e35d8f257c86bb

SHA1
40b520982a8e9e79c39eec75d3b62d685b8946e5

SHA256
ed8534bd6aa40b9c0af7f68fe82154b3e7f0a82ecb05189a2de9884521f963a5

SHA512
acd8e620abdd36c822245afbe87f27d554a111054ed434b8d03dd11e6ac2fd6ac8613a210b0bc4697738b73b0c6119a3d0d42671d67f1ecdea393beafd6ca401

Download Submit
memory/1748-56-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

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