kutaki | 3b998760d65dba0cf8820f4743bda79310dea60a0926460f613ee4d90fa0c720

Analysis

max time kernel
121s
max time network
120s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
02-06-2024 00:03

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General

Target

TDS Challan.exe
Size

740KB
MD5

1ba628a1b76f3a2f4133f94c7c18f91c
SHA1

876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA256

408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
SHA512

219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24
SSDEEP

12288:FCVVVVVVVf8g1ufKr43yABrn9AVGB7SLCY1J1kGl8V3eZsemDhkJM:FEk9n9AVG96r1/kGlVZshDhwM

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 1 IoCs

resource	yara_rule
behavioral1/files/0x0007000000012120-4.dat	family_kutaki

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2720	mjgniech.exe

Loads dropped DLL 2 IoCs

pid	Process
2940	TDS Challan.exe
2940	TDS Challan.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2940	TDS Challan.exe
2940	TDS Challan.exe
2940	TDS Challan.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe
2720	mjgniech.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2940 wrote to memory of 2580	2940	TDS Challan.exe	29
PID 2940 wrote to memory of 2580	2940	TDS Challan.exe	29
PID 2940 wrote to memory of 2580	2940	TDS Challan.exe	29
PID 2940 wrote to memory of 2580	2940	TDS Challan.exe	29
PID 2940 wrote to memory of 2720	2940	TDS Challan.exe	31
PID 2940 wrote to memory of 2720	2940	TDS Challan.exe	31
PID 2940 wrote to memory of 2720	2940	TDS Challan.exe	31
PID 2940 wrote to memory of 2720	2940	TDS Challan.exe	31

C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe
"C:\Users\Admin\AppData\Local\Temp\TDS Challan.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2940
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:2580
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mjgniech.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mjgniech.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mjgniech.exe

Filesize
740KB

MD5
1ba628a1b76f3a2f4133f94c7c18f91c

SHA1
876664b10a1fc68dba94efbb6aaa9f8eae3d1fac

SHA256
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0

SHA512
219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24

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