kutaki | 5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e

Analysis

max time kernel
132s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06/09/2022, 11:07

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General

Target
HDFC Payment Receipt.exe
Size 536KB
Sample220906-m7zbwsbge7
SHA256 5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e
MD5 2a189ba5e989daca58342a7dd038b142
SHA1 abbaecc7acad08d1163a452cb56aa1d71c3582f8
SHA512 f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa
SSDEEP 6144:NT1htGytvUf4yclQgx7+8DfpedxbKT3F9opcVyUW4Es+CS/wUcvzUjSa5pK2mKd4:7P+8DpFTvodUB4/8vYjDpK8atfx8hDu
MD5 SHA1 SHA512 SSDEEP

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 2 IoCs

resource	yara_rule
behavioral2/files/0x0006000000022f55-137.dat	family_kutaki
behavioral2/files/0x0006000000022f55-138.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1216	ch.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	cmd.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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	mspaint.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1424	mspaint.exe
1424	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4452	HDFC Payment Receipt.exe
4452	HDFC Payment Receipt.exe
4452	HDFC Payment Receipt.exe
1424	mspaint.exe
1424	mspaint.exe
1424	mspaint.exe
1424	mspaint.exe
1216	ch.exe
1216	ch.exe
1216	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 4700	4452	HDFC Payment Receipt.exe	84
PID 4452 wrote to memory of 4700	4452	HDFC Payment Receipt.exe	84
PID 4452 wrote to memory of 4700	4452	HDFC Payment Receipt.exe	84
PID 4700 wrote to memory of 1424	4700	cmd.exe	86
PID 4700 wrote to memory of 1424	4700	cmd.exe	86
PID 4700 wrote to memory of 1424	4700	cmd.exe	86
PID 4452 wrote to memory of 1216	4452	HDFC Payment Receipt.exe	92
PID 4452 wrote to memory of 1216	4452	HDFC Payment Receipt.exe	92
PID 4452 wrote to memory of 1216	4452	HDFC Payment Receipt.exe	92

C:\Users\Admin\AppData\Local\Temp\HDFC Payment Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\HDFC Payment Receipt.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp
  2⤵
  - Checks computer location settings
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\SysWOW64\mspaint.exe
    "C:\Windows\system32\mspaint.exe" "C:\Users\Admin\AppData\Local\Temp\NewBitmapImage.bmp"
    3⤵
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:1424
- 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:1216

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:1968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

ch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
Size 536KB
SHA256 5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e
MD5 2a189ba5e989daca58342a7dd038b142
SHA1 abbaecc7acad08d1163a452cb56aa1d71c3582f8
SHA512 f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa
SSDEEP 6144:NT1htGytvUf4yclQgx7+8DfpedxbKT3F9opcVyUW4Es+CS/wUcvzUjSa5pK2mKd4:7P+8DpFTvodUB4/8vYjDpK8atfx8hDu
MD5 SHA1 SHA512 SSDEEP

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ch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
Size 536KB
SHA256 5587ae6cef689c180254ba9d455eb62c171c4bbb20f82af7450ea2eeff4eac1e
MD5 2a189ba5e989daca58342a7dd038b142
SHA1 abbaecc7acad08d1163a452cb56aa1d71c3582f8
SHA512 f22d03a70d3177096acb5f62f9f6949df2478cb7d2dea40fc2057b6f8ebf8bc28320f23e1c9a4edd92753baa989cea7d19482582a6d5878d3e9815c0ab800baa
SSDEEP 6144:NT1htGytvUf4yclQgx7+8DfpedxbKT3F9opcVyUW4Es+CS/wUcvzUjSa5pK2mKd4:7P+8DpFTvodUB4/8vYjDpK8atfx8hDu
MD5 SHA1 SHA512 SSDEEP

Submit Download