kutaki | 134611d2d413f43dba8ecbe2839a45db7d54bd3749d3e52a85769bf3dc83edd6

General

Target
Tax Payment Challan.exe
Size 3.7MB
Sample220616-ltwheagch4
SHA256 99229a496b7b21bc5385bf85b68358418a5e3554740fa8ed14d355c5bc25997d
MD5 5f25cb32cb11c4e4983d85bf95aee8f1
SHA1 cd7ec29d9a162ac4ffd453c2beafae52767a3739
SHA512 bd528327be04e93c074175cf415fdb75811d951eaf4fb752c1bc56cd843292ae8c10357a6b66745179d5007ad31867e83aeaa82b61f6165090e368a0c9332987
MD5 SHA1 SHA512

Score

10^/10

kutaki keylogger stealer

Malware Config

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/0x001900000001db43-135.dat	family_kutaki
behavioral2/files/0x001900000001db43-136.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4984	mvekumch.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-1-5-21-3751123196-3323558407-1869646069-1000\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\mvekumch.exe	Tax Payment Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mvekumch.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-1-5-21-3751123196-3323558407-1869646069-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2628	mspaint.exe
2628	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
1276	Tax Payment Challan.exe
1276	Tax Payment Challan.exe
1276	Tax Payment Challan.exe
2628	mspaint.exe
2628	mspaint.exe
4984	mvekumch.exe
2628	mspaint.exe
2628	mspaint.exe
4984	mvekumch.exe
4984	mvekumch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1276 wrote to memory of 812	1276	Tax Payment Challan.exe	79
PID 1276 wrote to memory of 812	1276	Tax Payment Challan.exe	79
PID 1276 wrote to memory of 812	1276	Tax Payment Challan.exe	79
PID 812 wrote to memory of 2628	812	cmd.exe	81
PID 812 wrote to memory of 2628	812	cmd.exe	81
PID 812 wrote to memory of 2628	812	cmd.exe	81
PID 1276 wrote to memory of 4984	1276	Tax Payment Challan.exe	86
PID 1276 wrote to memory of 4984	1276	Tax Payment Challan.exe	86
PID 1276 wrote to memory of 4984	1276	Tax Payment Challan.exe	86

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:1276
- 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:812
- - 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:2628
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mvekumch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mvekumch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4984

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:4600

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

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Downloads

mvekumch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mvekumch.exe
Size 3.7MB
SHA256 99229a496b7b21bc5385bf85b68358418a5e3554740fa8ed14d355c5bc25997d
MD5 5f25cb32cb11c4e4983d85bf95aee8f1
SHA1 cd7ec29d9a162ac4ffd453c2beafae52767a3739
SHA512 bd528327be04e93c074175cf415fdb75811d951eaf4fb752c1bc56cd843292ae8c10357a6b66745179d5007ad31867e83aeaa82b61f6165090e368a0c9332987
SSDEEP 24576:25rtqfeVw767pC2K1oORbtTe9mjzBZ0mVidePAeRUPmIAtqRXWLufmP/UDMS08Cz:ortqfeaPufmP/SA8NC
MD5 SHA1 SHA512 SSDEEP

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