kutaki | 529324b39de6f6a2a6095479f4dc4fe1856809b2eb60924ea3ab9592bf655a1e

Analysis

max time kernel
115s
max time network
126s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
27-10-2023 09:48

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General

Target

HDFC_RTGS.exe
Size

1.5MB
MD5

30adcb75b8ce11e32915d329f4292854
SHA1

cda01ae84ef0b9688f8911de661f1adec108a73b
SHA256

8de3fb617df36b4e33432d30ea4fc626c968421d594b0b5102f8d9b1fbb8fbdf
SHA512

d7d21d2a64719ac10e8818b2b775caa83a56e11e198cc60b28036a5631d7121b8d2dc777893d862a47caccee006ccb014e2f810229cf1b36d6492da9e2b031ef
SSDEEP

24576:XMjlxu1t+S0kLaSW/u/a+DzovnwNnxV/gb7e2AsvwbR281z+zfmP/UDMS08Ckn30:ulAR0kL1t8nO/CAsn81z+zfmP/SA8NE

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

http://ojorobia.club/laptop/laptop.php

http://terebinnahicc.club/sec/kool.txt

Signatures

Kutaki
Information stealer and keylogger that hides inside legitimate Visual Basic applications.
stealer keylogger kutaki

Kutaki Executable 4 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x000f0000000122ed-4.dat	family_kutaki
behavioral1/files/0x000f0000000122ed-6.dat	family_kutaki
behavioral1/files/0x000f0000000122ed-8.dat	family_kutaki
behavioral1/files/0x000f0000000122ed-10.dat	family_kutaki

Drops startup file 2 IoCs

Processes:

HDFC_RTGS.exe

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

Executes dropped EXE 1 IoCs

Processes:

wxxdrlch.exe

pid	Process
2548	wxxdrlch.exe

Loads dropped DLL 2 IoCs

Processes:

HDFC_RTGS.exe

pid	Process
2744	HDFC_RTGS.exe
2744	HDFC_RTGS.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 64 IoCs

Processes:

HDFC_RTGS.exewxxdrlch.exe

pid	Process
2744	HDFC_RTGS.exe
2744	HDFC_RTGS.exe
2744	HDFC_RTGS.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe
2548	wxxdrlch.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

HDFC_RTGS.exe

description	pid	Process	procid_target
PID 2744 wrote to memory of 2772	2744	HDFC_RTGS.exe	29
PID 2744 wrote to memory of 2772	2744	HDFC_RTGS.exe	29
PID 2744 wrote to memory of 2772	2744	HDFC_RTGS.exe	29
PID 2744 wrote to memory of 2772	2744	HDFC_RTGS.exe	29
PID 2744 wrote to memory of 2548	2744	HDFC_RTGS.exe	31
PID 2744 wrote to memory of 2548	2744	HDFC_RTGS.exe	31
PID 2744 wrote to memory of 2548	2744	HDFC_RTGS.exe	31
PID 2744 wrote to memory of 2548	2744	HDFC_RTGS.exe	31

C:\Users\Admin\AppData\Local\Temp\HDFC_RTGS.exe
"C:\Users\Admin\AppData\Local\Temp\HDFC_RTGS.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:2772
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wxxdrlch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wxxdrlch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2548

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

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Downloads

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

Filesize
1.5MB

MD5
30adcb75b8ce11e32915d329f4292854

SHA1
cda01ae84ef0b9688f8911de661f1adec108a73b

SHA256
8de3fb617df36b4e33432d30ea4fc626c968421d594b0b5102f8d9b1fbb8fbdf

SHA512
d7d21d2a64719ac10e8818b2b775caa83a56e11e198cc60b28036a5631d7121b8d2dc777893d862a47caccee006ccb014e2f810229cf1b36d6492da9e2b031ef

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

Filesize
1.5MB

MD5
30adcb75b8ce11e32915d329f4292854

SHA1
cda01ae84ef0b9688f8911de661f1adec108a73b

SHA256
8de3fb617df36b4e33432d30ea4fc626c968421d594b0b5102f8d9b1fbb8fbdf

SHA512
d7d21d2a64719ac10e8818b2b775caa83a56e11e198cc60b28036a5631d7121b8d2dc777893d862a47caccee006ccb014e2f810229cf1b36d6492da9e2b031ef

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

Filesize
1.5MB

MD5
30adcb75b8ce11e32915d329f4292854

SHA1
cda01ae84ef0b9688f8911de661f1adec108a73b

SHA256
8de3fb617df36b4e33432d30ea4fc626c968421d594b0b5102f8d9b1fbb8fbdf

SHA512
d7d21d2a64719ac10e8818b2b775caa83a56e11e198cc60b28036a5631d7121b8d2dc777893d862a47caccee006ccb014e2f810229cf1b36d6492da9e2b031ef

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

Filesize
1.5MB

MD5
30adcb75b8ce11e32915d329f4292854

SHA1
cda01ae84ef0b9688f8911de661f1adec108a73b

SHA256
8de3fb617df36b4e33432d30ea4fc626c968421d594b0b5102f8d9b1fbb8fbdf

SHA512
d7d21d2a64719ac10e8818b2b775caa83a56e11e198cc60b28036a5631d7121b8d2dc777893d862a47caccee006ccb014e2f810229cf1b36d6492da9e2b031ef

Download Submit