kutaki | 67570553571b9f3ad18daca129d096966dbf327c2e900f1873c3a26adf4ea53f

General

Target

Tax Payment Challan.exe
Size

3.7MB
MD5

5f25cb32cb11c4e4983d85bf95aee8f1
SHA1

cd7ec29d9a162ac4ffd453c2beafae52767a3739
SHA256

99229a496b7b21bc5385bf85b68358418a5e3554740fa8ed14d355c5bc25997d
SHA512

bd528327be04e93c074175cf415fdb75811d951eaf4fb752c1bc56cd843292ae8c10357a6b66745179d5007ad31867e83aeaa82b61f6165090e368a0c9332987

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
4676	gqqpnkch.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\gqqpnkch.exe	Tax Payment Challan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gqqpnkch.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
3928	mspaint.exe
3928	mspaint.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2116	Tax Payment Challan.exe
2116	Tax Payment Challan.exe
2116	Tax Payment Challan.exe
3928	mspaint.exe
3928	mspaint.exe
3928	mspaint.exe
3928	mspaint.exe
4676	gqqpnkch.exe
4676	gqqpnkch.exe
4676	gqqpnkch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 3652	2116	Tax Payment Challan.exe	82
PID 2116 wrote to memory of 3652	2116	Tax Payment Challan.exe	82
PID 2116 wrote to memory of 3652	2116	Tax Payment Challan.exe	82
PID 3652 wrote to memory of 3928	3652	cmd.exe	84
PID 3652 wrote to memory of 3928	3652	cmd.exe	84
PID 3652 wrote to memory of 3928	3652	cmd.exe	84
PID 2116 wrote to memory of 4676	2116	Tax Payment Challan.exe	89
PID 2116 wrote to memory of 4676	2116	Tax Payment Challan.exe	89
PID 2116 wrote to memory of 4676	2116	Tax Payment Challan.exe	89

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:2116
- 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:3652
- - 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:3928
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gqqpnkch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gqqpnkch.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4676

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DeviceAssociationService
1⤵
PID:1040

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

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Downloads

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

Filesize
3.7MB

MD5
5f25cb32cb11c4e4983d85bf95aee8f1

SHA1
cd7ec29d9a162ac4ffd453c2beafae52767a3739

SHA256
99229a496b7b21bc5385bf85b68358418a5e3554740fa8ed14d355c5bc25997d

SHA512
bd528327be04e93c074175cf415fdb75811d951eaf4fb752c1bc56cd843292ae8c10357a6b66745179d5007ad31867e83aeaa82b61f6165090e368a0c9332987

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

Filesize
3.7MB

MD5
5f25cb32cb11c4e4983d85bf95aee8f1

SHA1
cd7ec29d9a162ac4ffd453c2beafae52767a3739

SHA256
99229a496b7b21bc5385bf85b68358418a5e3554740fa8ed14d355c5bc25997d

SHA512
bd528327be04e93c074175cf415fdb75811d951eaf4fb752c1bc56cd843292ae8c10357a6b66745179d5007ad31867e83aeaa82b61f6165090e368a0c9332987

Download Submit

Analysis

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