kutaki | 61b2dea87b12e821f4f0cbb6cb51bbf15a261b5d27b868b2450b32b68016b31a

Analysis

max time kernel
159s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220722-en
resource tags

arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system
submitted
30/07/2022, 20:22

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

TDS Invoice.exe
Size

840KB
MD5

03d14d25935aabae662a09db5146ea35
SHA1

e75ffa7ef6be023be366f95dedffff934e890f06
SHA256

3a3ea1848d9834a0959b57b6225cc5730b3d576e8a73bdc129622a12d6e51bc0
SHA512

3f1cd8d0032f49a5a724479f45c3767910cfb9196aeec051a3e162af99631814cfb7fa9729274c091d6ca49a3db87a3f53d3d01eb72eb573f771eaca5617f61a

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/0x000300000001e40f-136.dat	family_kutaki
behavioral2/files/0x000300000001e40f-137.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
3372	fmxfepch.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fmxfepch.exe	TDS Invoice.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fmxfepch.exe	TDS Invoice.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	fmxfepch.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	fmxfepch.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2796	TDS Invoice.exe
2796	TDS Invoice.exe
2796	TDS Invoice.exe
3372	fmxfepch.exe
3372	fmxfepch.exe
3372	fmxfepch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 4276	2796	TDS Invoice.exe	82
PID 2796 wrote to memory of 4276	2796	TDS Invoice.exe	82
PID 2796 wrote to memory of 4276	2796	TDS Invoice.exe	82
PID 2796 wrote to memory of 3372	2796	TDS Invoice.exe	94
PID 2796 wrote to memory of 3372	2796	TDS Invoice.exe	94
PID 2796 wrote to memory of 3372	2796	TDS Invoice.exe	94

C:\Users\Admin\AppData\Local\Temp\TDS Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\TDS Invoice.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:4276
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fmxfepch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\fmxfepch.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:3372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
840KB

MD5
03d14d25935aabae662a09db5146ea35

SHA1
e75ffa7ef6be023be366f95dedffff934e890f06

SHA256
3a3ea1848d9834a0959b57b6225cc5730b3d576e8a73bdc129622a12d6e51bc0

SHA512
3f1cd8d0032f49a5a724479f45c3767910cfb9196aeec051a3e162af99631814cfb7fa9729274c091d6ca49a3db87a3f53d3d01eb72eb573f771eaca5617f61a

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

Filesize
840KB

MD5
03d14d25935aabae662a09db5146ea35

SHA1
e75ffa7ef6be023be366f95dedffff934e890f06

SHA256
3a3ea1848d9834a0959b57b6225cc5730b3d576e8a73bdc129622a12d6e51bc0

SHA512
3f1cd8d0032f49a5a724479f45c3767910cfb9196aeec051a3e162af99631814cfb7fa9729274c091d6ca49a3db87a3f53d3d01eb72eb573f771eaca5617f61a

Download Submit