kutaki | 2c72daa02805c43f5a35ebca409ad1ddcad3c4b244a9a0579d529b722fea9e6a

Analysis

max time kernel
150s
max time network
31s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
25-01-2023 19:47

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General

Target

4710472a59fc98d7368b3aa1b719f024.exe
Size

453KB
MD5

4710472a59fc98d7368b3aa1b719f024
SHA1

f37094d763df983afce0ab20b49cc4afda0abedc
SHA256

2c72daa02805c43f5a35ebca409ad1ddcad3c4b244a9a0579d529b722fea9e6a
SHA512

ea798060fdc5368815b8cfa68892b6799dedae3354fe6bf8712a1c26b6c7281ea29bef50b2a63ef1d9eaa1dc517842059060eef60a58bc0aa025b9d0caa60ebb
SSDEEP

12288:8U4Tisi646A9jmP/uhu/yMS08CkntxYR/L:rDsufmP/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 3 IoCs

resource	yara_rule
behavioral1/files/0x0009000000012738-58.dat	family_kutaki
behavioral1/files/0x0009000000012738-59.dat	family_kutaki
behavioral1/files/0x0009000000012738-62.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1504	vrxjlyfk.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vrxjlyfk.exe	4710472a59fc98d7368b3aa1b719f024.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vrxjlyfk.exe	4710472a59fc98d7368b3aa1b719f024.exe

Loads dropped DLL 2 IoCs

pid	Process
1232	4710472a59fc98d7368b3aa1b719f024.exe
1232	4710472a59fc98d7368b3aa1b719f024.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
324	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
1232	4710472a59fc98d7368b3aa1b719f024.exe
1232	4710472a59fc98d7368b3aa1b719f024.exe
1232	4710472a59fc98d7368b3aa1b719f024.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe
1504	vrxjlyfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 524	1232	4710472a59fc98d7368b3aa1b719f024.exe	29
PID 1232 wrote to memory of 524	1232	4710472a59fc98d7368b3aa1b719f024.exe	29
PID 1232 wrote to memory of 524	1232	4710472a59fc98d7368b3aa1b719f024.exe	29
PID 1232 wrote to memory of 524	1232	4710472a59fc98d7368b3aa1b719f024.exe	29
PID 1232 wrote to memory of 1504	1232	4710472a59fc98d7368b3aa1b719f024.exe	31
PID 1232 wrote to memory of 1504	1232	4710472a59fc98d7368b3aa1b719f024.exe	31
PID 1232 wrote to memory of 1504	1232	4710472a59fc98d7368b3aa1b719f024.exe	31
PID 1232 wrote to memory of 1504	1232	4710472a59fc98d7368b3aa1b719f024.exe	31

C:\Users\Admin\AppData\Local\Temp\4710472a59fc98d7368b3aa1b719f024.exe
"C:\Users\Admin\AppData\Local\Temp\4710472a59fc98d7368b3aa1b719f024.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:524
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vrxjlyfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\vrxjlyfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1504

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:324

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

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Downloads

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

Filesize
453KB

MD5
4710472a59fc98d7368b3aa1b719f024

SHA1
f37094d763df983afce0ab20b49cc4afda0abedc

SHA256
2c72daa02805c43f5a35ebca409ad1ddcad3c4b244a9a0579d529b722fea9e6a

SHA512
ea798060fdc5368815b8cfa68892b6799dedae3354fe6bf8712a1c26b6c7281ea29bef50b2a63ef1d9eaa1dc517842059060eef60a58bc0aa025b9d0caa60ebb

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

Filesize
453KB

MD5
4710472a59fc98d7368b3aa1b719f024

SHA1
f37094d763df983afce0ab20b49cc4afda0abedc

SHA256
2c72daa02805c43f5a35ebca409ad1ddcad3c4b244a9a0579d529b722fea9e6a

SHA512
ea798060fdc5368815b8cfa68892b6799dedae3354fe6bf8712a1c26b6c7281ea29bef50b2a63ef1d9eaa1dc517842059060eef60a58bc0aa025b9d0caa60ebb

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

Filesize
453KB

MD5
4710472a59fc98d7368b3aa1b719f024

SHA1
f37094d763df983afce0ab20b49cc4afda0abedc

SHA256
2c72daa02805c43f5a35ebca409ad1ddcad3c4b244a9a0579d529b722fea9e6a

SHA512
ea798060fdc5368815b8cfa68892b6799dedae3354fe6bf8712a1c26b6c7281ea29bef50b2a63ef1d9eaa1dc517842059060eef60a58bc0aa025b9d0caa60ebb

Download Submit
memory/1232-56-0x00000000760B1000-0x00000000760B3000-memory.dmp

Filesize
8KB

Download