kutaki | d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34

Analysis

max time kernel
75s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
26-04-2023 15:46

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General

Target

217edd398f416851e2cbc52f868735c9.exe
Size

521KB
MD5

217edd398f416851e2cbc52f868735c9
SHA1

9bc4c13a5747101b3ecefcc9bbc6e558bb97adec
SHA256

d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34
SHA512

4d1d7a9aea4fea33495048a28a3ea3d90c6a1c2ef470588feb033fe6be8ab40d0d846a03181521a6f510fe918236b62099bdd64973b0ce841b13c9ea8e7b05d1
SSDEEP

12288:K6LK18Gnl3Pw9Yi46A9jmP/uhu/yMS08CkntxYRTL:K6L5Gnl3HfmP/UDMS08Ckn3C

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 4 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000122fe-64.dat	family_kutaki
behavioral1/files/0x000b0000000122fe-62.dat	family_kutaki
behavioral1/files/0x000b0000000122fe-60.dat	family_kutaki
behavioral1/files/0x000b0000000122fe-58.dat	family_kutaki

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pvayjwfk.exe	217edd398f416851e2cbc52f868735c9.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pvayjwfk.exe	217edd398f416851e2cbc52f868735c9.exe

Executes dropped EXE 1 IoCs

pid	Process
660	pvayjwfk.exe

Loads dropped DLL 2 IoCs

pid	Process
1724	217edd398f416851e2cbc52f868735c9.exe
1724	217edd398f416851e2cbc52f868735c9.exe

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1060	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
1724	217edd398f416851e2cbc52f868735c9.exe
1724	217edd398f416851e2cbc52f868735c9.exe
1724	217edd398f416851e2cbc52f868735c9.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe
660	pvayjwfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1184	1724	217edd398f416851e2cbc52f868735c9.exe	29
PID 1724 wrote to memory of 1184	1724	217edd398f416851e2cbc52f868735c9.exe	29
PID 1724 wrote to memory of 1184	1724	217edd398f416851e2cbc52f868735c9.exe	29
PID 1724 wrote to memory of 1184	1724	217edd398f416851e2cbc52f868735c9.exe	29
PID 1724 wrote to memory of 660	1724	217edd398f416851e2cbc52f868735c9.exe	31
PID 1724 wrote to memory of 660	1724	217edd398f416851e2cbc52f868735c9.exe	31
PID 1724 wrote to memory of 660	1724	217edd398f416851e2cbc52f868735c9.exe	31
PID 1724 wrote to memory of 660	1724	217edd398f416851e2cbc52f868735c9.exe	31

C:\Users\Admin\AppData\Local\Temp\217edd398f416851e2cbc52f868735c9.exe
"C:\Users\Admin\AppData\Local\Temp\217edd398f416851e2cbc52f868735c9.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1184
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pvayjwfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\pvayjwfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:660

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1060

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\pvayjwfk.exe

Filesize
521KB

MD5
217edd398f416851e2cbc52f868735c9

SHA1
9bc4c13a5747101b3ecefcc9bbc6e558bb97adec

SHA256
d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34

SHA512
4d1d7a9aea4fea33495048a28a3ea3d90c6a1c2ef470588feb033fe6be8ab40d0d846a03181521a6f510fe918236b62099bdd64973b0ce841b13c9ea8e7b05d1

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

Filesize
521KB

MD5
217edd398f416851e2cbc52f868735c9

SHA1
9bc4c13a5747101b3ecefcc9bbc6e558bb97adec

SHA256
d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34

SHA512
4d1d7a9aea4fea33495048a28a3ea3d90c6a1c2ef470588feb033fe6be8ab40d0d846a03181521a6f510fe918236b62099bdd64973b0ce841b13c9ea8e7b05d1

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

Filesize
521KB

MD5
217edd398f416851e2cbc52f868735c9

SHA1
9bc4c13a5747101b3ecefcc9bbc6e558bb97adec

SHA256
d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34

SHA512
4d1d7a9aea4fea33495048a28a3ea3d90c6a1c2ef470588feb033fe6be8ab40d0d846a03181521a6f510fe918236b62099bdd64973b0ce841b13c9ea8e7b05d1

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

Filesize
521KB

MD5
217edd398f416851e2cbc52f868735c9

SHA1
9bc4c13a5747101b3ecefcc9bbc6e558bb97adec

SHA256
d2f8b78d8bc87cb6a703b593213573c850d37c146775cdc3bff274d1c929de34

SHA512
4d1d7a9aea4fea33495048a28a3ea3d90c6a1c2ef470588feb033fe6be8ab40d0d846a03181521a6f510fe918236b62099bdd64973b0ce841b13c9ea8e7b05d1

Download Submit
memory/660-118-0x0000000003070000-0x0000000003B2A000-memory.dmp

Filesize
10.7MB

Download
memory/1060-117-0x0000000000160000-0x0000000000162000-memory.dmp

Filesize
8KB

Download
memory/1060-119-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/1060-120-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/1184-116-0x0000000002010000-0x0000000002012000-memory.dmp

Filesize
8KB

Download