kutaki | 9a1d08a5e847f6faf3abdbbf95388055757c544c5b792be39463b94417d9ea69

Analysis

max time kernel
155s
max time network
174s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/12/2022, 09:05

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General

Target

jmt.exe
Size

629KB
MD5

79203689b5f7811d9215a51c7d8ca106
SHA1

97137de64f6d4f8e7d2ae769024ee4053bb3058e
SHA256

9a1d08a5e847f6faf3abdbbf95388055757c544c5b792be39463b94417d9ea69
SHA512

fe697e799f618dd45cd7e5d30dae3fa296303c337d1087b3a34adcc9a1b8282bd1c4d45256cbfb56d14f309464d6fc0040ebb9961e9779b890ef1748c032dcba
SSDEEP

12288:diwaCECK5cldtdlEqDPylAwl46A9jmP/uhu/yMS08CkntxYRvL:qCED5cldtdPDgAw+fmP/UDMS08Ckn32

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/0x000500000001d9f5-138.dat	family_kutaki
behavioral2/files/0x000500000001d9f5-139.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
3892	rxyxlsfk.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-1-5-21-2295526160-1155304984-640977766-1000\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\rxyxlsfk.exe	jmt.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rxyxlsfk.exe	jmt.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-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1888	mspaint.exe
1888	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
3064	jmt.exe
3064	jmt.exe
3064	jmt.exe
1888	mspaint.exe
1888	mspaint.exe
1888	mspaint.exe
1888	mspaint.exe
3892	rxyxlsfk.exe
3892	rxyxlsfk.exe
3892	rxyxlsfk.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 1352	3064	jmt.exe	81
PID 3064 wrote to memory of 1352	3064	jmt.exe	81
PID 3064 wrote to memory of 1352	3064	jmt.exe	81
PID 1352 wrote to memory of 1888	1352	cmd.exe	83
PID 1352 wrote to memory of 1888	1352	cmd.exe	83
PID 1352 wrote to memory of 1888	1352	cmd.exe	83
PID 3064 wrote to memory of 3892	3064	jmt.exe	89
PID 3064 wrote to memory of 3892	3064	jmt.exe	89
PID 3064 wrote to memory of 3892	3064	jmt.exe	89

C:\Users\Admin\AppData\Local\Temp\jmt.exe
"C:\Users\Admin\AppData\Local\Temp\jmt.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3064
- 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:1352
- - 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:1888
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rxyxlsfk.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rxyxlsfk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3892

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:2844

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\rxyxlsfk.exe

Filesize
629KB

MD5
79203689b5f7811d9215a51c7d8ca106

SHA1
97137de64f6d4f8e7d2ae769024ee4053bb3058e

SHA256
9a1d08a5e847f6faf3abdbbf95388055757c544c5b792be39463b94417d9ea69

SHA512
fe697e799f618dd45cd7e5d30dae3fa296303c337d1087b3a34adcc9a1b8282bd1c4d45256cbfb56d14f309464d6fc0040ebb9961e9779b890ef1748c032dcba

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rxyxlsfk.exe

Filesize
629KB

MD5
79203689b5f7811d9215a51c7d8ca106

SHA1
97137de64f6d4f8e7d2ae769024ee4053bb3058e

SHA256
9a1d08a5e847f6faf3abdbbf95388055757c544c5b792be39463b94417d9ea69

SHA512
fe697e799f618dd45cd7e5d30dae3fa296303c337d1087b3a34adcc9a1b8282bd1c4d45256cbfb56d14f309464d6fc0040ebb9961e9779b890ef1748c032dcba

Download Submit