kutaki | 3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd

General

Target
3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
Size 568KB
Sample220701-jd1q3sabal
SHA256 3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd
MD5 609b31697442f224deb7fcd4170e8fd3
SHA1 11aed89fd1a0141fcc4626c1411239e5afe6ee8c
SHA512 aeb9d03cc8feab950ddb36ffab3e68a2eab9fd31ab4da01236ee8e539d4078ac92d28ef7245a346a331324cd3aea20f3f18322f8371153ca93ac4b5c94aa724c
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/0x001b00000001dab9-134.dat	family_kutaki
behavioral2/files/0x001b00000001dab9-135.dat	family_kutaki

Executes dropped EXE 1 IoCs

pid	Process
1316	euywtfch.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\euywtfch.exe	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\euywtfch.exe	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.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	euywtfch.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	euywtfch.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
4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
1316	euywtfch.exe
1316	euywtfch.exe
1316	euywtfch.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4588 wrote to memory of 5060	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	79
PID 4588 wrote to memory of 5060	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	79
PID 4588 wrote to memory of 5060	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	79
PID 4588 wrote to memory of 1316	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	83
PID 4588 wrote to memory of 1316	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	83
PID 4588 wrote to memory of 1316	4588	3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe	83

C:\Users\Admin\AppData\Local\Temp\3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe
"C:\Users\Admin\AppData\Local\Temp\3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd.exe"
1⤵
- Drops startup file
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4588
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c C:\Users\Admin\AppData\Local\Temp\
  2⤵
  PID:5060
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\euywtfch.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\euywtfch.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious use of SetWindowsHookEx
  PID:1316

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

euywtfch.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\euywtfch.exe
Size 568KB
SHA256 3e6593faa630ec2c87ff8406f08264bb055982363400fddeaca502b0019ce6fd
MD5 609b31697442f224deb7fcd4170e8fd3
SHA1 11aed89fd1a0141fcc4626c1411239e5afe6ee8c
SHA512 aeb9d03cc8feab950ddb36ffab3e68a2eab9fd31ab4da01236ee8e539d4078ac92d28ef7245a346a331324cd3aea20f3f18322f8371153ca93ac4b5c94aa724c
SSDEEP 12288:TV4gmym7HFTQOlxtnp+jOuRFQGSPI5eLXg:a17lxijO+FQGmI5eLXg
MD5 SHA1 SHA512 SSDEEP

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