kutaki | adb3a34eb8e6464c7e2b7b4cbd314ed8bce96482c5ce66a09ece79b86591daaa

General

Target
Tax Payment Challan.exe
Sample220610-ewybfsfdbj

Score

10^/10

kutaki keylogger stealer

Malware Config

Extracted

Family

kutaki

C2

http://newloshree.xyz/work/kenny3.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/0x000300000001db7f-135.dat	family_kutaki
behavioral2/files/0x000300000001db7f-136.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4952	fnpaefch.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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fnpaefch.exe	Tax Payment Challan.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fnpaefch.exe	Tax Payment Challan.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-1-5-21-1081944012-3634099177-1681222835-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4184	mspaint.exe
4184	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4976	Tax Payment Challan.exe
4976	Tax Payment Challan.exe
4976	Tax Payment Challan.exe
4184	mspaint.exe
4184	mspaint.exe
4952	fnpaefch.exe
4184	mspaint.exe
4184	mspaint.exe
4952	fnpaefch.exe
4952	fnpaefch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4976 wrote to memory of 5048	4976	Tax Payment Challan.exe	80
PID 4976 wrote to memory of 5048	4976	Tax Payment Challan.exe	80
PID 4976 wrote to memory of 5048	4976	Tax Payment Challan.exe	80
PID 5048 wrote to memory of 4184	5048	cmd.exe	82
PID 5048 wrote to memory of 4184	5048	cmd.exe	82
PID 5048 wrote to memory of 4184	5048	cmd.exe	82
PID 4976 wrote to memory of 4952	4976	Tax Payment Challan.exe	88
PID 4976 wrote to memory of 4952	4976	Tax Payment Challan.exe	88
PID 4976 wrote to memory of 4952	4976	Tax Payment Challan.exe	88

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4976
- 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:5048
- - 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:4184
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fnpaefch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fnpaefch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4952

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:1156

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

fnpaefch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fnpaefch.exe
Size 716KB
SHA256 0aa466d43ac980075738dafa15dde3e6ed03925fe732eb2d90f31ad297c49b23
MD5 048d34edb1310036f884ccca5905b216
SHA1 47bc33931d26ee7d7455398a74abff5beca1d39c
SHA512 d853f906f18483e7d5e835af8b6239bb55722a9be0224c3897ec5cf09f7ef33836edbd192427aa53e4dc34140fcb921e95099d2e23d29cfba76bdab90473f186
SSDEEP 12288:BpotTnTENZwfEPegZ7HueeRTpSYh/mW5c46A9jmP/uhu/yMS08CkntxYRc:BWTQNnPegZ7HueeRT04fmP/UDMS08CkN
MD5 SHA1 SHA512 SSDEEP

Submit Download