kutaki | 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0

General

Target
408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
Size 740KB
Sample220703-mama3ahah6
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24
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/0x000300000001e5e0-134.dat	family_kutaki
behavioral2/files/0x000300000001e5e0-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
644	bknidzch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.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	bknidzch.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	bknidzch.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
1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
644	bknidzch.exe
644	bknidzch.exe
644	bknidzch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1240 wrote to memory of 4904	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	82
PID 1240 wrote to memory of 4904	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	82
PID 1240 wrote to memory of 4904	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	82
PID 1240 wrote to memory of 644	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	93
PID 1240 wrote to memory of 644	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	93
PID 1240 wrote to memory of 644	1240	408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe	93

C:\Users\Admin\AppData\Local\Temp\408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe
"C:\Users\Admin\AppData\Local\Temp\408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1240
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:4904
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:644

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

bknidzch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bknidzch.exe
Size 740KB
SHA256 408e62f6612f1ace5d52c48c850a16881504dd50dd3af9bfc245bae8cb7cfeb0
MD5 1ba628a1b76f3a2f4133f94c7c18f91c
SHA1 876664b10a1fc68dba94efbb6aaa9f8eae3d1fac
SHA512 219a3a6e8cea16a58b90d7e2a044c4e7e26145e7e33c5a73033e382b2ccd8f8e16767af8af22f7f1db973733619a03e5cce1a4c2327f2d8f79db67f534f67e24
SSDEEP 12288:FCVVVVVVVf8g1ufKr43yABrn9AVGB7SLCY1J1kGl8V3eZsemDhkJM:FEk9n9AVG96r1/kGlVZshDhwM
MD5 SHA1 SHA512 SSDEEP

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