kutaki | 381ec80e02dba4fe1877e427522ea92a94b29b7f45bddd11c1f2ef9724dd6d2e

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

Processes:

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

Drops startup file 2 IoCs

Processes:

9693fd176c8734b1928a56cb9771a0c8.exe

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

Processes:

rkbblfch.exe

pid process

2716 rkbblfch.exe
Loads dropped DLL 2 IoCs

Processes:

9693fd176c8734b1928a56cb9771a0c8.exe

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

Processes:

DllHost.exe

pid process

2612 DllHost.exe

pid	process
2716	rkbblfch.exe

pid	process
2612	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

Processes:

9693fd176c8734b1928a56cb9771a0c8.exerkbblfch.exe

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

Processes:

9693fd176c8734b1928a56cb9771a0c8.exe

description	pid	process	target process
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	cmd.exe
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	cmd.exe
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	cmd.exe
PID 3060 wrote to memory of 2760	3060	9693fd176c8734b1928a56cb9771a0c8.exe	cmd.exe
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	rkbblfch.exe
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	rkbblfch.exe
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	rkbblfch.exe
PID 3060 wrote to memory of 2716	3060	9693fd176c8734b1928a56cb9771a0c8.exe	rkbblfch.exe

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

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads