kutaki | 37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe

General

Target

37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
Size

707KB
MD5

eb31bd6d5ff7c28b47395961db00d4bd
SHA1

2a41952d03da49c16095cc5aca603cd3bb8a2972
SHA256

37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe
SHA512

c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

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/0x0003000000000709-134.dat	family_kutaki
behavioral2/files/0x0003000000000709-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
5104	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	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.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

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
5104	hyuder.exe
5104	hyuder.exe
5104	hyuder.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 940	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	80
PID 4984 wrote to memory of 940	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	80
PID 4984 wrote to memory of 940	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	80
PID 4984 wrote to memory of 5104	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	87
PID 4984 wrote to memory of 5104	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	87
PID 4984 wrote to memory of 5104	4984	37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe	87

C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe
"C:\Users\Admin\AppData\Local\Temp\37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:940
- 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
  - Suspicious use of SetWindowsHookEx
  PID:5104

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

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

Filesize
707KB

MD5
eb31bd6d5ff7c28b47395961db00d4bd

SHA1
2a41952d03da49c16095cc5aca603cd3bb8a2972

SHA256
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe

SHA512
c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

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

Filesize
707KB

MD5
eb31bd6d5ff7c28b47395961db00d4bd

SHA1
2a41952d03da49c16095cc5aca603cd3bb8a2972

SHA256
37d09b414bcdb52bd41321de0c8003f713537bf79e25636433cd553bbc0c5bbe

SHA512
c38436a2588d43af05dae56cd1933f4fab83431d910267926640ba58a3892448ad908a5be7947d9b3c7ce5d60c5e2a170a744d41e608ad3e2dfc064514ceb137

Download Submit

Analysis

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