kutaki | ba29bda31111ba22d9c9ee00201e1f09c911501efd6555fce54ec2e7bde89d25

Analysis

max time kernel
143s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
22/09/2022, 22:34

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General

Target
Payment Confirmation.exe
Size 368KB
Sample220922-2he92scee6
SHA256 3de1ccba9149c85aea890f3e20a4e8908ecc5fc143d66ebaf195f597d032f122
MD5 6194e97f02193b30006bb56c1d85ad26
SHA1 a42a91469fea64a4d14cafa0ef8e30208490499f
SHA512 69d5f949df9f08c82377e46b25b8b7fb65ad2f47f1cddc3dc35b2557fb63372fe838dfcf7cfa24ae0900107a03e1892e1aa83c5e035934427fe5560f53c1083c
SSDEEP 6144:1L0VwchW4Es+CS/wUcvzUjSa5pK2mKdl0TruunfD09gfJChgGJhCj:1L0LB4/8vYjDpK8atfx8hDu
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/0x0001000000022e74-138.dat	family_kutaki
behavioral2/files/0x0001000000022e74-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4488	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-1-5-21-929662420-1054238289-2961194603-1000\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	Payment Confirmation.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe	Payment Confirmation.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-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4656	mspaint.exe
4656	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3120	Payment Confirmation.exe
3120	Payment Confirmation.exe
3120	Payment Confirmation.exe
4656	mspaint.exe
4656	mspaint.exe
4488	ch.exe
4656	mspaint.exe
4656	mspaint.exe
4488	ch.exe
4488	ch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3120 wrote to memory of 3980	3120	Payment Confirmation.exe	85
PID 3120 wrote to memory of 3980	3120	Payment Confirmation.exe	85
PID 3120 wrote to memory of 3980	3120	Payment Confirmation.exe	85
PID 3980 wrote to memory of 4656	3980	cmd.exe	87
PID 3980 wrote to memory of 4656	3980	cmd.exe	87
PID 3980 wrote to memory of 4656	3980	cmd.exe	87
PID 3120 wrote to memory of 4488	3120	Payment Confirmation.exe	91
PID 3120 wrote to memory of 4488	3120	Payment Confirmation.exe	91
PID 3120 wrote to memory of 4488	3120	Payment Confirmation.exe	91

C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe
"C:\Users\Admin\AppData\Local\Temp\Payment Confirmation.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3120
- 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:3980
- - 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:4656
- 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:4488

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:3312

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

Replay Monitor

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Downloads

ch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ch.exe
Size 368KB
SHA256 3de1ccba9149c85aea890f3e20a4e8908ecc5fc143d66ebaf195f597d032f122
MD5 6194e97f02193b30006bb56c1d85ad26
SHA1 a42a91469fea64a4d14cafa0ef8e30208490499f
SHA512 69d5f949df9f08c82377e46b25b8b7fb65ad2f47f1cddc3dc35b2557fb63372fe838dfcf7cfa24ae0900107a03e1892e1aa83c5e035934427fe5560f53c1083c
SSDEEP 6144:1L0VwchW4Es+CS/wUcvzUjSa5pK2mKdl0TruunfD09gfJChgGJhCj:1L0LB4/8vYjDpK8atfx8hDu
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 368KB
SHA256 3de1ccba9149c85aea890f3e20a4e8908ecc5fc143d66ebaf195f597d032f122
MD5 6194e97f02193b30006bb56c1d85ad26
SHA1 a42a91469fea64a4d14cafa0ef8e30208490499f
SHA512 69d5f949df9f08c82377e46b25b8b7fb65ad2f47f1cddc3dc35b2557fb63372fe838dfcf7cfa24ae0900107a03e1892e1aa83c5e035934427fe5560f53c1083c
SSDEEP 6144:1L0VwchW4Es+CS/wUcvzUjSa5pK2mKdl0TruunfD09gfJChgGJhCj:1L0LB4/8vYjDpK8atfx8hDu
MD5 SHA1 SHA512 SSDEEP

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