f783f39824bcdd902660358f4a3d496305092309f13e2c1a15b057175bf78c67

Analysis

user interaction
yes
max time kernel
56s
max time network
23s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
07/11/2026, 11:43

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General

Target
KeepClean.exe
Size 405KB
Sample261107-nvzmkaxt8j
SHA256 f783f39824bcdd902660358f4a3d496305092309f13e2c1a15b057175bf78c67
MD5 33b955e25db460dc94fe7e8939750a81
SHA1 34462316ec9879abb2f48b180c2ec5ba7c87a5a1
SHA512 c4233cd6429ba23778fba7c1a654b8ce48f3a93dafc81f0a0455d05caecc41332f7053c78b1cea6188b25b10afeb6f950973ca5f765495892e22d2efd0f0f04c
SSDEEP 6144:CcQH5c5i2Yq6X2KQLJH/0R3HVUm3whrra:Cn5Ci2F6GKEB/0RFUmg4
TLSH
T1D494D60AEA7519F5D0BAE03C8582652AF87136A64370FFCB67944A571F327F4A93DB00
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

discovery ransomware spyware stealer

Malware Config

Signatures

Renames multiple (73) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	KeepClean.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	KeepClean.exe

Modifies registry class 14 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\.md	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\.md\ = "md_auto_file"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\옫∀耀	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\edit\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\open	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\open\command	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\open\command\ = "%SystemRoot%\\system32\\NOTEPAD.EXE %1"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\Local Settings	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file	OpenWith.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\옫∀耀\ = "md_auto_file"	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\edit	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-1404337215-1550464601-2805570857-1000_Classes\md_auto_file\shell\edit\command	OpenWith.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{B4BFCC3A-DB2C-424C-B029-7FE99A87C641}\Instance\	NOTEPAD.EXE

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
5860	NOTEPAD.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	OpenWith.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 5860	2264	OpenWith.exe	93

C:\Users\Admin\AppData\Local\Temp\KeepClean.exe
"C:\Users\Admin\AppData\Local\Temp\KeepClean.exe"
1⤵
- Reads the TCP/IP host and domain name from the registry
PID:5660

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\READMETOCLEAN.md
  2⤵
  - Modifies registry class
  - Opens file in notepad (likely ransom note)
  PID:5860

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

READMETOCLEAN.md

Path C:\Users\Admin\Desktop\READMETOCLEAN.md
Size 580B
SHA256 fbd283a3588d0f8996a9b539aa9c26855dd316dadc268a13039418756bd8ee7f
MD5 e9eadd9788ba2119116ba85a79023b0c
SHA1 12bc4a8336d8eb9852e1d4edd770d2338a35ceb3
SHA512 e3a52f2fd3f54b7be6cffb583a77500772409933af153cda568e1bb6c31c7164d889391c39821fd9e65550f8619283c098d20c98435512bd18a8e294e003e892
TLSH
T176F0412EDE0276A9908008702B7F28E0EC22408C861812D338584BAC2F3C304BBEE06E
MD5 SHA1 SHA512 TLSH

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