e79f164ccc75a5d5c032b4c5a96d6ad7604faffb28afe77bc29b9173fa3543e4

max time kernel
80s
max time network
68s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-es
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-eslocale:es-esos:windows11-ltsc_2024-x64systemwindows
submitted
11/11/2026, 01:54

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General

Target
Ransomware/Krotten.exe
Size 53KB
Sample261111-cb2f9sts2r
SHA256 e79f164ccc75a5d5c032b4c5a96d6ad7604faffb28afe77bc29b9173fa3543e4
MD5 87ccd6f4ec0e6b706d65550f90b0e3c7
SHA1 213e6624bff6064c016b9cdc15d5365823c01f5f
SHA512 a72403d462e2e2e181dbdabfcc02889f001387943571391befed491aaecba830b0869bdd4d82bca137bd4061bbbfb692871b1b4622c4a7d9f16792c60999c990
SSDEEP 768:4yKoNLsn4Jp9ZvRInygrpMoZN+WtOl08jxBEHCDwBLpZTPCUvQK:j/sn4/OycxZN+MKxp8t9zQK
TLSH
T17D335A9374A4D0F2C2F163B15D1A3A20EBBDA2663569E7114F647C49AC7B143E7230EB
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

adware defense_evasion discovery persistence spyware stealer

Malware Config

Signatures

Disables RegEdit via registry modification 2 IoCs

defense_evasion

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe

Disables Task Manager via registry modification
defense_evasion

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\WINDOWS\\Web\\rundll32.exe"	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AVPCC = "C:\\WINDOWS\\Cursors\\avp.exe"	Krotten.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\LegalNoticeCaption = "DANGER"	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\LegalNoticeText = "Äëÿ òîãî ÷òîáû âîññòàíîâèòü íîðìàëüíóþ ðàáîòó ñâîåãî êîìïüþòåðà íå ïîòåðÿâ ÂÑÞ èíôîðìàöèþ! È ñ ýêîíîìèâ äåíüãè, ïðèøëè ìíå íà e-mail [email protected] êîä ïîïîëíåíèÿ ñ÷åòà êèåâñòàð íà 25 ãðèâåíü. Â îòâåò â òå÷åíèå äâåíàäöàòè ÷àñîâ íà ñâîé e-mail òû ïîëó÷èøü ôàèë äëÿ óäàëåíèÿ ýòîé ïðîãðàììû."	Krotten.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\WINDOWS\Web	Krotten.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	Krotten.exe

Modifies Control Panel 6 IoCs

defense_evasion

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\International	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\International\sTimeFormat = "ÕÓÉ"	Krotten.exe
Key created	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\Desktop	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\Desktop\WallpaperOriginX = "210"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\Desktop\WallpaperOriginY = "187"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Control Panel\Desktop\MenuShowDelay = "9999"	Krotten.exe

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Main	Krotten.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::"	Krotten.exe
Key created	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::"	Krotten.exe

Modifies Internet Explorer start page 1 TTPs 2 IoCs

stealer

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Start Page = "http://poetry.rotten.com/lightning/"	Krotten.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-461973139-3212354679-1508698038-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "http://poetry.rotten.com/lightning/"	Krotten.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\CLASSES\REGFILE\SHELL\OPEN\COMMAND	Krotten.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeSystemtimePrivilege	5612	Krotten.exe

System policy modification 1 TTPs 37 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuMyMusic = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoActiveDesktop = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoRun = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFavoritesMenu = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoCommonGroups = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoLogOff = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoUserNameInStartMenu = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoNetHood = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoManageMyComputerVerb = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum\{450D8FBA-AD25-11D0-98A8-0800361B1103} = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDesktop = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDrives = "1044"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoControlPanel = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoToolbarCustomize = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoThemesTab = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuPinnedList = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoViewOnDrive = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoRecentDocsMenu = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoClose = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoPrinters = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\NonEnum\{20D04FE0-3AEA-1069-A2D8-08002B30309D} = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Uninstall	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFind = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMHelp = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Uninstall\NoAddRemovePrograms = "1"	Krotten.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuMFUprogramsList = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMMyDocs = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoPrinterTabs = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\NoDispCPL = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoStartMenuSubFolders = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSMMyPictures = "1"	Krotten.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoSaveSettings = "1"	Krotten.exe

C:\Users\Admin\AppData\Local\Temp\Ransomware\Krotten.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\Krotten.exe"
1⤵
- Disables RegEdit via registry modification
- Adds Run key to start application
- Modifies WinLogon
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- System policy modification
PID:5612

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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