kutaki | 6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f

Analysis

max time kernel
149s
max time network
127s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
26-02-2024 11:34

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General

Target

Challan.exe
Size

573KB
MD5

111d37dd39bb7f73b76eb13e22a16178
SHA1

c358557e24b87ae758606d707763bfa95da88a61
SHA256

6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f
SHA512

31b0424ce110261af02c23c94a60659301ba6eacc4223578b04fe1fc815f4eb41f7d899f6322e642a6df62e88580a4d70131a01500ebe12b9ffa46d9e7232bf4
SSDEEP

12288:Ua4NFT8ElW46A9jmP/uhu/yMS08CkntxYRtqL:J6YahfmP/UDMS08Ckn3v

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://linkwotowoto.club/new/two.php

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/0x000b0000000155e2-4.dat	family_kutaki

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2956	xbtrtdfk.exe

Loads dropped DLL 2 IoCs

pid	Process
2740	Challan.exe
2740	Challan.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
2636	DllHost.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2740	Challan.exe
2740	Challan.exe
2740	Challan.exe
2956	xbtrtdfk.exe
2956	xbtrtdfk.exe
2956	xbtrtdfk.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 1624	2740	Challan.exe	28
PID 2740 wrote to memory of 1624	2740	Challan.exe	28
PID 2740 wrote to memory of 1624	2740	Challan.exe	28
PID 2740 wrote to memory of 1624	2740	Challan.exe	28
PID 2740 wrote to memory of 2956	2740	Challan.exe	30
PID 2740 wrote to memory of 2956	2740	Challan.exe	30
PID 2740 wrote to memory of 2956	2740	Challan.exe	30
PID 2740 wrote to memory of 2956	2740	Challan.exe	30

C:\Users\Admin\AppData\Local\Temp\Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Challan.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1624
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xbtrtdfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xbtrtdfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2956

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:2636

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

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\xbtrtdfk.exe

Filesize
573KB

MD5
111d37dd39bb7f73b76eb13e22a16178

SHA1
c358557e24b87ae758606d707763bfa95da88a61

SHA256
6492086998bb2a858614dc2310e2349d5a282eadc5a08376c1111dca7d765c7f

SHA512
31b0424ce110261af02c23c94a60659301ba6eacc4223578b04fe1fc815f4eb41f7d899f6322e642a6df62e88580a4d70131a01500ebe12b9ffa46d9e7232bf4

Download Submit
memory/1624-62-0x00000000005F0000-0x00000000005F2000-memory.dmp

Filesize
8KB

Download
memory/2636-63-0x00000000001E0000-0x00000000001E2000-memory.dmp

Filesize
8KB

Download
memory/2636-64-0x00000000007B0000-0x00000000007B1000-memory.dmp

Filesize
4KB

Download
memory/2636-65-0x00000000007B0000-0x00000000007B1000-memory.dmp

Filesize
4KB

Download