kutaki | db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841

General

Target
db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
Size 732KB
Sample220701-eddjbsaggk
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb
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/0x00050000000162b4-134.dat	family_kutaki
behavioral2/files/0x00050000000162b4-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1600	femsfach.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.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	femsfach.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	femsfach.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
1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
1600	femsfach.exe
1600	femsfach.exe
1600	femsfach.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 5052	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	81
PID 1620 wrote to memory of 5052	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	81
PID 1620 wrote to memory of 5052	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	81
PID 1620 wrote to memory of 1600	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	90
PID 1620 wrote to memory of 1600	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	90
PID 1620 wrote to memory of 1600	1620	db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe	90

C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe
"C:\Users\Admin\AppData\Local\Temp\db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:5052
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:1600

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

femsfach.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\femsfach.exe
Size 732KB
SHA256 db983f3dd070a7b403f0b56f7b377959c46416b3b48328b2e343f2ecd988b841
MD5 a20059fdc62668a1bc68d5f1691b33de
SHA1 6f86fab1c3f5897c46e7a8a9386214c1dd3be4da
SHA512 5a882b4b51ee7bb9e3afd7033004391f9d71e82775da0034eb44cdaf1df1b6061a379a854d20576f3010d266f6475607fd29550825f1bd110698b5d525b986cb
SSDEEP 12288:S+Igl7oknDIF7ljIgl7oknDIFkRjyL1UMOyhVGB7SLCY1J1kGl8V3eZsemDhkJj:flckDIFhLlckDIFkML1LVG96r1/kGlVX
MD5 SHA1 SHA512 SSDEEP

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