kutaki | 42a599077c305dc279440b0107ad763be0217960c598e16fa74182ed2457c2d3

General

Target
Tax Payment Challan.scr
Size 816KB
Sample220708-caf4yaeed7
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba
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/0x0010000000022e28-134.dat	family_kutaki
behavioral2/files/0x0010000000022e28-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
4248	tjqfpdch.exe

Drops startup file 2 IoCs

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

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	tjqfpdch.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	tjqfpdch.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
4892	Tax Payment Challan.scr
4892	Tax Payment Challan.scr
4892	Tax Payment Challan.scr
4248	tjqfpdch.exe
4248	tjqfpdch.exe
4248	tjqfpdch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 4836	4892	Tax Payment Challan.scr	81
PID 4892 wrote to memory of 4836	4892	Tax Payment Challan.scr	81
PID 4892 wrote to memory of 4836	4892	Tax Payment Challan.scr	81
PID 4892 wrote to memory of 4248	4892	Tax Payment Challan.scr	89
PID 4892 wrote to memory of 4248	4892	Tax Payment Challan.scr	89
PID 4892 wrote to memory of 4248	4892	Tax Payment Challan.scr	89

C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr
"C:\Users\Admin\AppData\Local\Temp\Tax Payment Challan.scr" /S
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4892
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:4836
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tjqfpdch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tjqfpdch.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:4248

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

tjqfpdch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tjqfpdch.exe
Size 816KB
SHA256 bdecdba010952f854106cced016ee000bfa09dd499d66fbc43acd585c9348c29
MD5 62fd0aecb02f01f3a59131ba5ae8d38a
SHA1 2c89f903ad958316ed22706c740cde7ee759247f
SHA512 84ef0834069a71dc1e4b73c2a927a7357dc066ff72ef479166695d45ee631155b785c1009248b2fbb8452945f8db83f4e89e5cbbc4f974d2d7ac05f8f68e2dba
SSDEEP 24576:zD7afb2MJMJkmryuVG96r1/kGlVZshDhw2:zD7aikHuU9E19lPshw2
MD5 SHA1 SHA512 SSDEEP

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