kutaki | 381ec80e02dba4fe1877e427522ea92a94b29b7f45bddd11c1f2ef9724dd6d2e

Analysis

max time kernel
56s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 07:12

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General

Target

9693fd176c8734b1928a56cb9771a0c8.exe
Size

376KB
MD5

9693fd176c8734b1928a56cb9771a0c8
SHA1

35d2579e6a03c2e769b17f1aa8ce934f91fd5e13
SHA256

381ec80e02dba4fe1877e427522ea92a94b29b7f45bddd11c1f2ef9724dd6d2e
SHA512

cb68ab4fb44c52763294fbe010ae6383d1feafa0ea67c663c333f36b5ddac7374b2a787fe7f6b331893c40e94c060782a6d2a65acadb5771c05defe103a6a847
SSDEEP

6144:7IaXScY1S4GlA9jmHv/VCSY3hw9lMbk6u1QMS0y+lqiHTonWryFDYRF:H46A9jmP/uhu/yMS08CkntxYRF

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 1 IoCs

resource	yara_rule
behavioral1/files/0x0032000000015c2f-8.dat	family_kutaki

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rkbblfch.exe	9693fd176c8734b1928a56cb9771a0c8.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rkbblfch.exe	9693fd176c8734b1928a56cb9771a0c8.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	rkbblfch.exe

Loads dropped DLL 2 IoCs

pid	Process
3060	9693fd176c8734b1928a56cb9771a0c8.exe
3060	9693fd176c8734b1928a56cb9771a0c8.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
2612	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
3060	9693fd176c8734b1928a56cb9771a0c8.exe
3060	9693fd176c8734b1928a56cb9771a0c8.exe
3060	9693fd176c8734b1928a56cb9771a0c8.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe
2716	rkbblfch.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	29
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	29
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	29
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	29
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	31
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	31
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	31
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	31

C:\Users\Admin\AppData\Local\Temp\9693fd176c8734b1928a56cb9771a0c8.exe
"C:\Users\Admin\AppData\Local\Temp\9693fd176c8734b1928a56cb9771a0c8.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:2760
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rkbblfch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rkbblfch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2716

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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Downloads

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

Filesize
376KB

MD5
9693fd176c8734b1928a56cb9771a0c8

SHA1
35d2579e6a03c2e769b17f1aa8ce934f91fd5e13

SHA256
381ec80e02dba4fe1877e427522ea92a94b29b7f45bddd11c1f2ef9724dd6d2e

SHA512
cb68ab4fb44c52763294fbe010ae6383d1feafa0ea67c663c333f36b5ddac7374b2a787fe7f6b331893c40e94c060782a6d2a65acadb5771c05defe103a6a847

Download Submit
memory/2612-63-0x0000000000120000-0x0000000000122000-memory.dmp

Filesize
8KB

Download
memory/2612-64-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2612-65-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2716-66-0x0000000004230000-0x000000000427F000-memory.dmp

Filesize
316KB

Download
memory/2716-67-0x0000000004430000-0x0000000005492000-memory.dmp

Filesize
16.4MB

Download
memory/2760-62-0x0000000002160000-0x0000000002162000-memory.dmp

Filesize
8KB

Download