kutaki | 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f

General

Target
689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
Size 755KB
Sample220701-gbmekaecbp
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2
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 4 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015c46-58.dat	family_kutaki
behavioral1/files/0x0008000000015c46-59.dat	family_kutaki
behavioral1/files/0x0008000000015c46-61.dat	family_kutaki
behavioral1/files/0x0008000000015c46-66.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
996	hyuder.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe

Loads dropped DLL 2 IoCs

pid	Process
1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.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-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Internet Explorer\Main	hyuder.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
996	hyuder.exe
996	hyuder.exe
996	hyuder.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 1456	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	26
PID 1552 wrote to memory of 1456	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	26
PID 1552 wrote to memory of 1456	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	26
PID 1552 wrote to memory of 1456	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	26
PID 1552 wrote to memory of 996	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	28
PID 1552 wrote to memory of 996	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	28
PID 1552 wrote to memory of 996	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	28
PID 1552 wrote to memory of 996	1552	689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe	28

C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe
"C:\Users\Admin\AppData\Local\Temp\689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f.exe"
1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1552
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:1456
- 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:996

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

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Downloads

hyuder.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
Size 755KB
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2
SSDEEP 12288:6XJT7lzwFAvBzK61oORo2pGPqlSpwhm4s5bsGSCs5:65T7lzwFAvBzK61oORo2rlSpnHuGE5
MD5 SHA1 SHA512 SSDEEP

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hyuder.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
Size 755KB
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2
SSDEEP 12288:6XJT7lzwFAvBzK61oORo2pGPqlSpwhm4s5bsGSCs5:65T7lzwFAvBzK61oORo2rlSpnHuGE5
MD5 SHA1 SHA512 SSDEEP

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hyuder.exe

Path \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
Size 755KB
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2
SSDEEP 12288:6XJT7lzwFAvBzK61oORo2pGPqlSpwhm4s5bsGSCs5:65T7lzwFAvBzK61oORo2rlSpnHuGE5
MD5 SHA1 SHA512 SSDEEP

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hyuder.exe

Path \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\hyuder.exe
Size 755KB
SHA256 689a19bf9eed2b5458ee1ac3eb1b127500f658eee3acde9955efae97fb6ec32f
MD5 77f193dbefdabd317c13e70d24fba155
SHA1 efca7bcad227df76ba1f3997bc32a7e18c68999f
SHA512 d5ee8b4e8ed3184fc0f4c9996364b20538f64ed1f29364d456a28284d845c1e4fd2bdffb17ccc0831644180eb007d1a1fa9943c2514633db2d8e44c543bc27a2
SSDEEP 12288:6XJT7lzwFAvBzK61oORo2pGPqlSpwhm4s5bsGSCs5:65T7lzwFAvBzK61oORo2rlSpnHuGE5
MD5 SHA1 SHA512 SSDEEP

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memory/996-65-0x0000000003911000-0x00000000047BD000-memory.dmp

Download

memory/1552-56-0x00000000759E1000-0x00000000759E3000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads