8380fd22afc0de82f34c63cc37146f809dd742a136381e097e7f1c55a570b644

Analysis

max time kernel
148s
max time network
126s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
12/10/2026, 23:56

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General

Target
jaffacakes118_Backdoor.Win32.Koutodoor.aihc.exe
Size 192KB
Sample261012-3zewaattb1
SHA256 8380fd22afc0de82f34c63cc37146f809dd742a136381e097e7f1c55a570b644
MD5 2a646c29149fa21b1ab6203b010f00d7
SHA1 2782fa7b222a1ccd9757c02f56d0ba9ae5e12eb0
SHA512 bafefa628d65c9a301b881a4cc1815972016a53d412ef232ead13a5ac1a201f88fbba380aad23affb45cc1ca6dcd98221644e33c9d753a1b35d51851ac79b8d7
SSDEEP 3072:apYzTJXgGRiwKOmaGD02DsLyLBkkLYgjTbWTGATsuZfl:apuoHDaS+gjTaNwuZ9
TLSH
T172146956B7198911DA6E3031032F17F26327DBF0FD52854296839FD92CA7183BDB622B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery execution

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4688	eoktss.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
120	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eoktss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_Backdoor.Win32.Koutodoor.aihc.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5824	PING.EXE

Modifies registry class 7 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\\shell\\weokt\\command	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\weokt	eoktss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\\{871C5380-42A0-1069-A2EA-08002B30309D}\\shell\\weokt	eoktss.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5824	PING.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 120	2372	jaffacakes118_Backdoor.Win32.Koutodoor.aihc.exe	88
PID 120 wrote to memory of 4688	120	cmd.exe	90
PID 120 wrote to memory of 5824	120	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.Koutodoor.aihc.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Backdoor.Win32.Koutodoor.aihc.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\unjfmua.bat
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:120
- - C:\Users\Admin\AppData\Local\Temp\eoktss.exe
    "C:\Users\Admin\AppData\Local\Temp\eoktss.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Modifies registry class
    PID:4688
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5824

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

T1018

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

eoktss.exe

Path C:\Users\Admin\AppData\Local\Temp\eoktss.exe
Size 144KB
SHA256 99c8685cad7e66cc15ec2b9636ada6b28ab2dfff12ccb9ce5da6e5b9d85f77c9
MD5 f6b1157caf2b07d7fc5f546f70192377
SHA1 3505779902c0b2dd49c6541bfba075527dbd57ba
SHA512 50dae3aeda50ed54368429d04a8705907405f39214320fb15d03dfccf06ddd68d6b2e20d124dc4be3186270c9de18511c0a1b557a16b72217dac6832b331a95c
SSDEEP 3072:IpYzTJXgGRiwKOmaGD02DsLyLBkkLYgjTbWTGg:IpuoHDaS+gjTax
TLSH
T1EBE3145ABB194511EA6E3072036F16F2A327CBF0FD52814286978FD42C971877DF622B
MD5 SHA1 SHA512 SSDEEP TLSH

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piaipp.bat

Path C:\Users\Admin\AppData\Local\Temp\piaipp.bat
Size 167B
SHA256 62b2474f27680ec4f3b6c2564cf70abe7ee3532e12527fb94dd832948f3bdf63
MD5 6e755779f500e6df512795762b0ae905
SHA1 dd096ac6d4ee66befa9334b925213c9da6fc6fd8
SHA512 68fd6b3e1f659f73c2067e39d858e072299466db5a8a5e9f576e0cbe005e9b82c2959aedc543cf58530e93814b26e699883a9735690b420f60bab72f5921d2de
TLSH
T1C0C08C4E82838A6E0A08C4A71839A74FE06A0C8C3A493B045B31F9CC22E2429AA87704
MD5 SHA1 SHA512 TLSH

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unjfmua.bat

Path C:\Users\Admin\AppData\Local\Temp\unjfmua.bat
Size 124B
SHA256 95b5fb0dafc391a8a1c9857bad6f4daae89c0bbd5536ea1b29b16de2b97d2517
MD5 7c25f958f2fccc3b1a6064b98940c0b0
SHA1 0aa6ac61f45b4fb5cf3156f0edb46780587242cc
SHA512 d2ac7d914117402d93e04e35b6a7ee65f0ab2f5735ca5f97fba07169ca2d7f54586db8ed77eed8511b76b449bf9ea5cedcd031e5547154c1a0ae8610ed3ad0ba
TLSH
T1A7B09B034ED7A6DE144DF16F0579955C8468CC783A553B10E710D40C1957F1DBA81355
MD5 SHA1 SHA512 TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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