kutaki | 2cabd4ef487d6c2493d2cf6fa45f3027473419125c7b54676459bc22da7c6a00

General

Target

Tax Payment Challan.exe
Size

795KB
MD5

75ee2cab545b73dc3ffb4a51c188f413
SHA1

a13d169deb59c403ece2e7a53e6413064595ac86
SHA256

8ea0ce7a60ddf35b65a734e87ff8e1b35c4525105fbf37ba36c1096a8e1c8765
SHA512

4e5d9d60df5e4a7bc4982484e99cd71bdd48c80cf8f40f8f9f7c98d15a646712fe31397f8bb1b43e247fbe785817b433ef39db4f2edcd8996c713908f62429a4

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 4 IoCs

resource	yara_rule
behavioral1/files/0x0009000000008527-58.dat	family_kutaki
behavioral1/files/0x0009000000008527-59.dat	family_kutaki
behavioral1/files/0x0009000000008527-61.dat	family_kutaki
behavioral1/files/0x0009000000008527-66.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
2020	hyuder.exe

Drops startup file 2 IoCs

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

Loads dropped DLL 2 IoCs

pid	Process
1908	Tax Payment Challan.exe
1908	Tax Payment Challan.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	hyuder.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	hyuder.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Internet Explorer\Main	hyuder.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1908	Tax Payment Challan.exe
1908	Tax Payment Challan.exe
1908	Tax Payment Challan.exe
2020	hyuder.exe
2020	hyuder.exe
2020	hyuder.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 2032	1908	Tax Payment Challan.exe	28
PID 1908 wrote to memory of 2032	1908	Tax Payment Challan.exe	28
PID 1908 wrote to memory of 2032	1908	Tax Payment Challan.exe	28
PID 1908 wrote to memory of 2032	1908	Tax Payment Challan.exe	28
PID 1908 wrote to memory of 2020	1908	Tax Payment Challan.exe	30
PID 1908 wrote to memory of 2020	1908	Tax Payment Challan.exe	30
PID 1908 wrote to memory of 2020	1908	Tax Payment Challan.exe	30
PID 1908 wrote to memory of 2020	1908	Tax Payment Challan.exe	30

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:2032
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:2020

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

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\hyuder.exe

Filesize
795KB

MD5
75ee2cab545b73dc3ffb4a51c188f413

SHA1
a13d169deb59c403ece2e7a53e6413064595ac86

SHA256
8ea0ce7a60ddf35b65a734e87ff8e1b35c4525105fbf37ba36c1096a8e1c8765

SHA512
4e5d9d60df5e4a7bc4982484e99cd71bdd48c80cf8f40f8f9f7c98d15a646712fe31397f8bb1b43e247fbe785817b433ef39db4f2edcd8996c713908f62429a4

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

Filesize
795KB

MD5
75ee2cab545b73dc3ffb4a51c188f413

SHA1
a13d169deb59c403ece2e7a53e6413064595ac86

SHA256
8ea0ce7a60ddf35b65a734e87ff8e1b35c4525105fbf37ba36c1096a8e1c8765

SHA512
4e5d9d60df5e4a7bc4982484e99cd71bdd48c80cf8f40f8f9f7c98d15a646712fe31397f8bb1b43e247fbe785817b433ef39db4f2edcd8996c713908f62429a4

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

Filesize
795KB

MD5
75ee2cab545b73dc3ffb4a51c188f413

SHA1
a13d169deb59c403ece2e7a53e6413064595ac86

SHA256
8ea0ce7a60ddf35b65a734e87ff8e1b35c4525105fbf37ba36c1096a8e1c8765

SHA512
4e5d9d60df5e4a7bc4982484e99cd71bdd48c80cf8f40f8f9f7c98d15a646712fe31397f8bb1b43e247fbe785817b433ef39db4f2edcd8996c713908f62429a4

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe

Filesize
795KB

MD5
75ee2cab545b73dc3ffb4a51c188f413

SHA1
a13d169deb59c403ece2e7a53e6413064595ac86

SHA256
8ea0ce7a60ddf35b65a734e87ff8e1b35c4525105fbf37ba36c1096a8e1c8765

SHA512
4e5d9d60df5e4a7bc4982484e99cd71bdd48c80cf8f40f8f9f7c98d15a646712fe31397f8bb1b43e247fbe785817b433ef39db4f2edcd8996c713908f62429a4

Download Submit
memory/1908-56-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download
memory/2020-65-0x00000000031C1000-0x000000000406D000-memory.dmp

Filesize
14.7MB

Download

Analysis

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