kutaki | c540c69985914bd3e5f0fda62e55dde2bbea52c94305f305092fda4fa954c5b3

Analysis

max time kernel
116s
max time network
47s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/08/2022, 18:53

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General

Target

HDFC Payment Receipt.exe
Size

536KB
MD5

2a189ba5e989daca58342a7dd038b142
SHA1

abbaecc7acad08d1163a452cb56aa1d71c3582f8
SHA256

5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e
SHA512

f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa
SSDEEP

6144:NT1htGytvUf4yclQgx7+8DfpedxbKT3F9opcVyUW4Es+CS/wUcvzUjSa5pK2mKd4:7P+8DpFTvodUB4/8vYjDpK8atfx8hDu

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/0x0008000000014544-58.dat	family_kutaki
behavioral1/files/0x0008000000014544-59.dat	family_kutaki
behavioral1/files/0x0008000000014544-61.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1840	ch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	HDFC Payment Receipt.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	HDFC Payment Receipt.exe

Loads dropped DLL 2 IoCs

pid	Process
900	HDFC Payment Receipt.exe
900	HDFC Payment Receipt.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
1432	DllHost.exe

Suspicious use of SetWindowsHookEx 64 IoCs

pid	Process
900	HDFC Payment Receipt.exe
900	HDFC Payment Receipt.exe
900	HDFC Payment Receipt.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe
1840	ch.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 900 wrote to memory of 1932	900	HDFC Payment Receipt.exe	28
PID 900 wrote to memory of 1932	900	HDFC Payment Receipt.exe	28
PID 900 wrote to memory of 1932	900	HDFC Payment Receipt.exe	28
PID 900 wrote to memory of 1932	900	HDFC Payment Receipt.exe	28
PID 900 wrote to memory of 1840	900	HDFC Payment Receipt.exe	30
PID 900 wrote to memory of 1840	900	HDFC Payment Receipt.exe	30
PID 900 wrote to memory of 1840	900	HDFC Payment Receipt.exe	30
PID 900 wrote to memory of 1840	900	HDFC Payment Receipt.exe	30

C:\Users\Admin\AppData\Local\Temp\HDFC Payment Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\HDFC Payment Receipt.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:900
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  PID:1932
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1840

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1432

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

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Downloads

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

Filesize
536KB

MD5
2a189ba5e989daca58342a7dd038b142

SHA1
abbaecc7acad08d1163a452cb56aa1d71c3582f8

SHA256
5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e

SHA512
f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa

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

Filesize
536KB

MD5
2a189ba5e989daca58342a7dd038b142

SHA1
abbaecc7acad08d1163a452cb56aa1d71c3582f8

SHA256
5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e

SHA512
f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa

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

Filesize
536KB

MD5
2a189ba5e989daca58342a7dd038b142

SHA1
abbaecc7acad08d1163a452cb56aa1d71c3582f8

SHA256
5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e

SHA512
f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa

Download Submit
memory/900-56-0x0000000075571000-0x0000000075573000-memory.dmp

Filesize
8KB

Download
memory/1840-66-0x00000000031E0000-0x0000000003C9A000-memory.dmp

Filesize
10.7MB

Download