kutaki | 55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

Analysis

max time kernel
152s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
25/07/2022, 14:42

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General

Target

55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
Size

795KB
MD5

feaa99287f22b1fad4acdfec4481daa3
SHA1

9e882b1037f36bb2ae131500954c16bc1f0aa26f
SHA256

55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c
SHA512

13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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/0x0008000000022e40-134.dat	family_kutaki
behavioral2/files/0x0008000000022e40-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
2836	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	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.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
2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
2836	hyuder.exe
2836	hyuder.exe
2836	hyuder.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 2380	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	80
PID 2624 wrote to memory of 2380	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	80
PID 2624 wrote to memory of 2380	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	80
PID 2624 wrote to memory of 2836	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	83
PID 2624 wrote to memory of 2836	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	83
PID 2624 wrote to memory of 2836	2624	55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe	83

C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe
"C:\Users\Admin\AppData\Local\Temp\55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:2380
- 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:2836

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
795KB

MD5
feaa99287f22b1fad4acdfec4481daa3

SHA1
9e882b1037f36bb2ae131500954c16bc1f0aa26f

SHA256
55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

SHA512
13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

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

Filesize
795KB

MD5
feaa99287f22b1fad4acdfec4481daa3

SHA1
9e882b1037f36bb2ae131500954c16bc1f0aa26f

SHA256
55dfd27d50e55d714888455ff76c5cbed787547df9e7f1bf7824d7e0994fdf6c

SHA512
13ed01e3afef06b0596cd549ef814f6aece751f221b806828bde945bb9989979e1b1381875219cb23b8494f186f4120acfa64ddb1c577adf555f5260eb884366

Download Submit