4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06

Analysis

max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
30/09/2026, 06:44

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General

Target
4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe
Size 899KB
Sample260930-hhztxassd1
SHA256 4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06
MD5 169a8cf1e873bac1f2c450d4387f6bcc
SHA1 4cb51ac4dd4c0ae6d4d5ef7815daf62577e74327
SHA512 2b124adfbeeafca61efba8404be6e523967be7c28c9305f6af10fe56715a93df559ad3405578e3e2d04072013f816b1c7eb95589c4da894a654ab11d791f9fa1
SSDEEP 24576:jGvrY3tcr1R2ydMQULhbeeE7xoD46mJvC0wErDpGvrY3tcr1R2ydMQULhbeeE7xi:jLN+GE3pLN+GE3q
TLSH
T112159E26F291C4B2D037293D8C1BA2B8599D7EA13D196C463AE83D4D5F393D03D2A397
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery persistence

Malware Config

Signatures

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-696679853-3915825385-3233721679-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	ttry.exe

Executes dropped EXE 2 IoCs

pid	Process
3864	tsay.exe
3756	ttry.exe

Adds Run key to start application 2 TTPs 3 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\RunOnce\msfsa = "C:\\windows\\tsay.exe"	4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\msfsa = "C:\\windows\\tsay.exe"	tsay.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\msfsa = "C:\\windows\\tsay.exe"	ttry.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

ioc	Process
\??\V:\	ttry.exe
\??\L:\	ttry.exe
\??\N:\	ttry.exe
\??\Q:\	ttry.exe
\??\X:\	ttry.exe
\??\Z:\	ttry.exe
\??\H:\	ttry.exe
\??\J:\	ttry.exe
\??\M:\	ttry.exe
\??\U:\	ttry.exe
\??\W:\	ttry.exe
\??\D:\	ttry.exe
\??\E:\	ttry.exe
\??\G:\	ttry.exe
\??\O:\	ttry.exe
\??\P:\	ttry.exe
\??\S:\	ttry.exe
\??\T:\	ttry.exe
\??\Y:\	ttry.exe
\??\F:\	ttry.exe
\??\I:\	ttry.exe
\??\K:\	ttry.exe
\??\R:\	ttry.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\windows\tsay.exe	4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe
File created	C:\windows\tsay.exe	tsay.exe
File created	C:\windows\ttry.exe	tsay.exe
File opened for modification	C:\windows\tsay.exe	ttry.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	ttry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tsay.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 3864 wrote to memory of 3756	3864	tsay.exe	91

C:\Users\Admin\AppData\Local\Temp\4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe
"C:\Users\Admin\AppData\Local\Temp\4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
PID:5444

C:\windows\tsay.exe
C:\windows\tsay.exe
1⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3864
- C:\windows\ttry.exe
  "C:\windows\ttry.exe"
  2⤵
  - Modifies visibility of file extensions in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:3756

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tsay.exe

Path C:\Windows\tsay.exe
Size 899KB
SHA256 4ef9aa619c130a2a1c2a2b362590585d698db052b0abbbf65f8f20dc3830bf06
MD5 169a8cf1e873bac1f2c450d4387f6bcc
SHA1 4cb51ac4dd4c0ae6d4d5ef7815daf62577e74327
SHA512 2b124adfbeeafca61efba8404be6e523967be7c28c9305f6af10fe56715a93df559ad3405578e3e2d04072013f816b1c7eb95589c4da894a654ab11d791f9fa1
SSDEEP 24576:jGvrY3tcr1R2ydMQULhbeeE7xoD46mJvC0wErDpGvrY3tcr1R2ydMQULhbeeE7xi:jLN+GE3pLN+GE3q
TLSH
T112159E26F291C4B2D037293D8C1BA2B8599D7EA13D196C463AE83D4D5F393D03D2A397
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3756-10-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3756-11-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3756-12-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3756-18-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3864-6-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/3864-9-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/5444-0-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/5444-1-0x0000000002360000-0x0000000002361000-memory.dmp

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memory/5444-2-0x0000000000453000-0x0000000000454000-memory.dmp

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memory/5444-4-0x0000000000400000-0x0000000000477000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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