kutaki | 2b230a2d05aeb0a05373055d4cef9d25450779b60d7cf8a399ac2b4b373df5a7

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2023 09:14

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General

Target

Receipt.exe
Size

521KB
MD5

3c44c9045db8891afbd59a812a5a535b
SHA1

cadb3a94b3a84b6d375b9f3225973a2aff690642
SHA256

2b230a2d05aeb0a05373055d4cef9d25450779b60d7cf8a399ac2b4b373df5a7
SHA512

78a7ce8b53a97d9c06c8a447db8478bf42400e3c2c4bd8206c1859c2538a9e35fb4dcb75767df179e34229f4ee2c9ec39670ad0b1503e5b46f2bb9d7f83d644f
SSDEEP

12288:+j1IXFF+ylEzw46A9jmP/uhu/yMS08CkntxYRnL:wIXFgXfmP/UDMS08Ckn3K

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/0x0007000000022f46-136.dat	family_kutaki
behavioral2/files/0x0007000000022f46-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
3924	apsmpxfk.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\apsmpxfk.exe	Receipt.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\apsmpxfk.exe	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
3084	mspaint.exe
3084	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3496	Receipt.exe
3496	Receipt.exe
3496	Receipt.exe
3924	apsmpxfk.exe
3924	apsmpxfk.exe
3924	apsmpxfk.exe
3084	mspaint.exe
3084	mspaint.exe
3084	mspaint.exe
3084	mspaint.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3496 wrote to memory of 4332	3496	Receipt.exe	80
PID 3496 wrote to memory of 4332	3496	Receipt.exe	80
PID 3496 wrote to memory of 4332	3496	Receipt.exe	80
PID 3496 wrote to memory of 3924	3496	Receipt.exe	82
PID 3496 wrote to memory of 3924	3496	Receipt.exe	82
PID 3496 wrote to memory of 3924	3496	Receipt.exe	82
PID 4332 wrote to memory of 3084	4332	cmd.exe	83
PID 4332 wrote to memory of 3084	4332	cmd.exe	83
PID 4332 wrote to memory of 3084	4332	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\Receipt.exe
"C:\Users\Admin\AppData\Local\Temp\Receipt.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3496
- 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:4332
- - 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:3084
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\apsmpxfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\apsmpxfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3924

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:1444

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

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

Filesize
521KB

MD5
3c44c9045db8891afbd59a812a5a535b

SHA1
cadb3a94b3a84b6d375b9f3225973a2aff690642

SHA256
2b230a2d05aeb0a05373055d4cef9d25450779b60d7cf8a399ac2b4b373df5a7

SHA512
78a7ce8b53a97d9c06c8a447db8478bf42400e3c2c4bd8206c1859c2538a9e35fb4dcb75767df179e34229f4ee2c9ec39670ad0b1503e5b46f2bb9d7f83d644f

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

Filesize
521KB

MD5
3c44c9045db8891afbd59a812a5a535b

SHA1
cadb3a94b3a84b6d375b9f3225973a2aff690642

SHA256
2b230a2d05aeb0a05373055d4cef9d25450779b60d7cf8a399ac2b4b373df5a7

SHA512
78a7ce8b53a97d9c06c8a447db8478bf42400e3c2c4bd8206c1859c2538a9e35fb4dcb75767df179e34229f4ee2c9ec39670ad0b1503e5b46f2bb9d7f83d644f

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